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(i) (i) (i) (i)

Traditional groups:

* Bryophyta * * Pteridophyta
Pteridophyta
* * Gymnospermae
Gymnospermae
* * Angiospermae
Angiospermae

SYNONYMS

* Cormophyta Endlicher , 1836 * Phyta Barkley , 1939 * Cormobionta Rothmaler , 1948 * Euplanta Barkley, 1949 * Telomobionta Takhtajan
Takhtajan
, 1964 * Embryobionta Cronquist et al. 1966 * Metaphyta Whittaker, 1969 * Plantae Margulis , 1971

The EMBRYOPHYTA are the most familiar group of green plants that form vegetation on earth. Living embryophytes include hornworts , liverworts , mosses , ferns , lycophytes , gymnosperms and flowering plants , and emerged within the Charophyte green algae . The Embryophyta
Embryophyta
are informally called LAND PLANTS because they live primarily in terrestrial habitats, while the related green algae are primarily aquatic. All are complex multicellular eukaryotes with specialized reproductive organs . The name derives from their innovative characteristic of nurturing the young embryo sporophyte during the early stages of its multicellular development within the tissues of the parent gametophyte . With very few exceptions, embryophytes obtain their energy by photosynthesis , that is by using the energy of sunlight to synthesize their food from carbon dioxide and water.

CONTENTS

* 1 Description * 2 Phylogeny and classification

* 3 Diversity

* 3.1 Bryophytes
Bryophytes
* 3.2 Rise of vascular plants * 3.3 Lycophytes and euphyllophytes * 3.4 Ferns and horsetails * 3.5 Seed
Seed
plants

* 4 References * 5 Bibliography

DESCRIPTION

The evolutionary origins of the embryophytes are discussed further below, but they are believed to have evolved from within a group of complex green algae during the Paleozoic
Paleozoic
era (which started around 540 million years ago ). Charales
Charales
or the stoneworts may be the best living illustration of that developmental step. Embryophytes are primarily adapted for life on land, although some are secondarily aquatic . Accordingly, they are often called land plants or terrestrial plants.

On a microscopic level, the cells of embryophytes are broadly similar to those of green algae, but differ in that in cell division the daughter nuclei are separated by a phragmoplast . They are eukaryotic , with a cell wall composed of cellulose and plastids surrounded by two membranes. The latter include chloroplasts , which conduct photosynthesis and store food in the form of starch , and are characteristically pigmented with chlorophylls a and b, generally giving them a bright green color. Embryophyte
Embryophyte
cells also generally have an enlarged central vacuole enclosed by a vacuolar membrane or tonoplast, which maintains cell turgor and keeps the plant rigid.

In common with all groups of multicellular algae they have a life cycle which involves 'alternation of generations '. A multicellular generation with a single set of chromosomes – the haploid gametophyte – produces sperm and eggs which fuse and grow into a multicellular generation with twice the number of chromosomes – the diploid sporophyte . The mature sporophyte produces haploid spores which grow into a gametophyte, thus completing the cycle. Embryophytes have two features related to their reproductive cycles which distinguish them from all other plant lineages. Firstly, their gametophytes produce sperm and eggs in multicellular structures (called 'antheridia ' and 'archegonia '), and fertilization of the ovum takes place within the archegonium rather than in the external environment. Secondly, and most importantly, the initial stage of development of the fertilized egg (the zygote ) into a diploid multicellular sporophyte, take place within the archegonium where it is both protected and provided with nutrition. This second feature is the origin of the term 'embryophyte' – the fertilized egg develops into a protected embryo, rather than dispersing as a single cell. In the bryophytes the sporophyte remains dependent on the gametophyte, while in all other embryophytes the sporophyte generation is dominant and capable of independent existence.

Embryophytes also differ from algae by having metamers . Metamers are repeated units of development, in which each unit derives from a single cell, but the resulting product tissue or part is largely the same for each cell. The whole organism is thus constructed from similar, repeating parts or metamers. Accordingly, these plants are sometimes termed 'metaphytes' and classified as the group Metaphyta (but Haeckel
Haeckel
's definition of Metaphyta places some algae in this group ). In all land plants a disc-like structure called a phragmoplast forms where the cell will divide , a trait only found in the land plants in the streptophyte lineage, some species within their relatives Coleochaetales
Coleochaetales
, Charales
Charales
and Zygnematales
Zygnematales
, as well as within subaerial species of the algae order Trentepohliales , and appears to be essential in the adaptation towards a terrestrial life style.

PHYLOGENY AND CLASSIFICATION

All green algae and land plants are now known to form a single evolutionary lineage or clade , one name for which is Viridiplantae (i.e. 'green plants'). According to several molecular clock estimates the Viridiplantae
Viridiplantae
split 1,200 million years ago to 725 million years ago into two clades: chlorophytes and streptophytes. The chlorophytes are considerably more diverse (with around 700 genera) and were originally marine, although some groups have since spread into fresh water. The streptophyte algae (i.e. the streptophyte clade minus the land plants) are less diverse (with around 122 genera) and adapted to fresh water very early in their evolutionary history. They have not spread into marine environments (only a few stoneworts, which belong to this group, tolerate brackish water). Some time during the Ordovician
Ordovician
period (which started around 490 million years ago ) one or more streptophytes invaded the land and began the evolution of the embryophyte land plants.

Becker and Marin speculate that land plants evolved from streptophytes rather than any other group of algae because streptophytes were adapted to living in fresh water. This prepared them to tolerate a range of environmental conditions found on land. Fresh water living made them tolerant of exposure to rain; living in shallow pools required tolerance to temperature variation, high levels of ultra-violet light and seasonal dehydration.

Relationships between the groups making up Viridiplantae
Viridiplantae
are still being elucidated. Views have changed considerably since 2000 and classifications have not yet caught up. However, the division between chlorophytes and streptophytes and the evolution of embryophytes from within the latter group, as shown in the cladogram below, are well established. Three approaches to classification are shown. Older classifications, as on the left, treated all green algae as a single division of the plant kingdom under the name Chlorophyta. Land plants were then placed in separate divisions. All the streptophyte algae can be grouped into one paraphyletic taxon, as in the middle, allowing the embryophytes to form a taxon at the same level. Alternatively, the embryophytes can be sunk into a monophyletic taxon comprising all the streptophytes, as shown below. A variety of names have been used for the different groups which result from these approaches; those used below are only one of a number of possibilities. The higher-level classification of the Viridiplantae
Viridiplantae
varies considerably, resulting in widely different ranks being assigned to the embryophytes, from kingdom to class.

Viridiplantae
Viridiplantae

chlorophytes

streptophytes

streptophyte algae (paraphyletic group)

embryophytes

Plantae Chlorophyta
Chlorophyta
all green algae Land plants separate divisions for each group Viridiplantae
Viridiplantae
Chlorophyta
Chlorophyta
~8 chlorophyte algal taxa Charophyta (paraphyletic) ~6 streptophyte algal taxa Embryophyta
Embryophyta
Viridiplantae
Viridiplantae
Chlorophyta
Chlorophyta
~8 chlorophyte algal taxa Streptophyta
Streptophyta
sensu Becker "> . The stoneworts (Charales) have traditionally been identified as closest to the embryophytes, but recent work suggests that either the Zygnematales
Zygnematales
or a clade consisting of the Zygnematales
Zygnematales
and the Coleochaetales
Coleochaetales
may be the sister group to the land plants. That the Zygnematales
Zygnematales
(or Zygnematophyceae) are the closest algal relatives to land plants was underpinned by an exhaustive phylogenetic analysis (phylogenomics) performed in 2014, which is supported by both plastid genome phylogenies as well as plastid gene content and properties.

The preponderance of currently available molecular evidence suggests that the groups making up the embryophytes are related as shown in the cladogram below (based on Qiu et al. 2006 with additional names from Crane et al. 2004).

Living embryophytes

Liverworts

Mosses
Mosses

Hornworts

Tracheophytes

Lycophytes

Euphyllophytes

Monilophytes (ferns and horsetails )

Spermatophytes

Gymnosperms

Angiosperms (flowering plants )

Studies based on morphology rather than on genes and proteins have regularly reached different conclusions; for example that neither the monilophytes (ferns and horsetails) nor the gymnosperms are a natural or monophyletic group.

There is considerable variation in how these relationships are converted into a formal classification . Consider the angiosperms or flowering plants . Many botanists, following Lindley in 1830, have treated the angiosperms as a division. Researchers concerned with fossil plants have usually followed Banks in treating the tracheophytes or vascular plants as a division , so that the angiosperms become a class or even a subclass. Two very different systems are shown below. The classification on the left is a traditional one, in which ten living groups are treated as separate divisions; the classification on the right (based on Kenrick and Crane's 1997 treatment) sharply reduces the rank of groups such as the flowering plants. (More complex classifications are needed if extinct plants are included.)

Two contrasting classifications of living land plants Liverworts Marchiantiophyta Marchiantiophyta

Mosses Bryophyta Bryophyta

Hornworts Anthocerotophyta Anthocerotophyta

Tracheophyta

Lycophytes Lycopodiophyta Lycophytina

Euphyllophytina

Ferns and horsetails Pteridophyta Moniliformopses

Radiatopses

Cycads Cycadophyta Cycadatae

Conifers Pinophyta Coniferophytatae

Ginkgo Ginkgophyta Ginkgoatae

Gnetophytes Gnetophyta Anthophytatae

Flowering plants Magnoliophyta

An updated phylogeny of EMBRYOPHYTA based on the work by Novíkov & Barabaš-Krasni 2015 with plant taxon authors from Anderson, Anderson border:0;padding:0 0.2em;border-bottom:1px solid;vertical-align:bottom;text-align:center;">

Embryophyta
Embryophyta

Marchantiophyta (Liverworts)

Stomatophyta

Bryophyta (Mosses)

Anthocerotophyta
Anthocerotophyta
(Hornworts)

Polysporangiophyta

?†Taeniocradales Němejc 1963

Horneophytopsida
Horneophytopsida
Nemejc 1960

Aglaophyton Edwards 1986

Tracheophyta
Tracheophyta

?†Yarraviales Novak 1961

Rhyniopsida
Rhyniopsida
Kryshtofovich 1925

Eutracheophytes

?†Cooksoniales Doweld 2001

?†Renaliaceae Doweld 2001

Lycopodiophytina Tippo sensu Ruggiero et al. 2015 (Clubmosses, Spikemosses border-left:1px solid;vertical-align:top;text-align:center;">

Euphyllophytina

Eophyllophyton Hao border-left:1px solid;vertical-align:top;text-align:center;">

Trimerophytopsida
Trimerophytopsida
Foster border-left:1px solid;vertical-align:top;text-align:center;">

Moniliformopses

Polypodiophytina Reveal 1966 s.l.(Ferns)

Radiatopses

Pertica Kasper border-left:1px solid;vertical-align:top;text-align:center;">

Lignophytes

?†Cecropsidales Stubblefield 1969

?†Noeggerathiopsida Krysht. 1934

†Aneurophytopsida Bierhorst ex Takhtajan
Takhtajan
1978

Metalignophytes

†Archaeopteridopsida Takhtajan
Takhtajan
1978

†Protopityales Nemejc 1963

Spermatophytina ( Seed
Seed
plants)

DIVERSITY

BRYOPHYTES

Most bryophytes, such as these mosses, produce stalked sporophytes from which their spores are released. Main article: Bryophyte
Bryophyte

Bryophytes
Bryophytes
consist of all non-vascular land plants (embryophytes without vascular tissue ). All are relatively small and are usually confined to environments that are humid or at least seasonally moist. They are limited by their reliance on water needed to disperse their gametes , although only a few bryophytes are truly aquatic. Most species are tropical, but there are many arctic species as well. They may locally dominate the ground cover in tundra and Arctic–alpine habitats or the epiphyte flora in rain forest habitats.

The three living divisions are the mosses (Bryophyta), hornworts (Anthocerotophyta), and liverworts (Marchantiophyta). Originally, these three groups were included together as classes within the single division Bryophyta. However, they now are placed separately into three divisions since the bryophytes as a whole are known to be a paraphyletic (artificial) group instead of a single lineage. Instead, the three bryophyte groups form an evolutionary grade of those land plants that are not vascular. Some closely related green algae are also non-vascular, but are not considered "land plants."

* Marchantiophyta (liverworts) * Bryophyta (mosses) * Anthocerotophyta
Anthocerotophyta
(hornworts)

Despite the fact that they are no longer classified as a single group, the bryophytes are still studied together because of their many biological similarities as non-vascular land plants. All three bryophyte groups share a haploid-dominant life cycle and unbranched sporophytes. These are traits that appear to be plesiotypic within the land plants, and thus were common to all early diverging lineages of plants on the land. The fact that the bryophytes have a life cycle in common is thus an artefact of being the oldest extant lineages of land plant, and not the result of close shared ancestry. (See the phylogeny above.)

The bryophyte life-cycle is strongly dominated by the haploid gametophyte generation. The sporophyte remains small and dependent on the parent gametophyte for its entire brief life. All other living groups of land plants have a life cycle dominated by the diploid sporophyte generation. It is in the diploid sporophyte that vascular tissue develops. Although some mosses have quite complex water-conducting vessels, bryophytes lack true vascular tissue.

Like the vascular plants, bryophytes do have differentiated stems, and although these are most often no more than a few centimeters tall, they do provide mechanical support. Most bryophytes also have leaves, although these typically are one cell thick and lack veins. Unlike the vascular plants, bryophytes lack true roots or any deep anchoring structures. Some species do grow a filamentous network of horizontal stems, but these have a primary function of mechanical attachment rather than extraction of soil nutrients (Palaeos 2008).

RISE OF VASCULAR PLANTS

Reconstruction of a plant of Rhynia

During the Silurian
Silurian
and Devonian
Devonian
periods (around 440 to 360 million years ago ), plants evolved which possessed true vascular tissue, including cells with walls strengthened by lignin (tracheids ). Some extinct early plants appear to be between the grade of organization of bryophytes and that of true vascular plants (eutracheophytes). Genera such as Horneophyton
Horneophyton
have water-conducting tissue more like that of mosses, but a different life-cycle in which the sporophyte is more developed than the gametophyte. Genera such as Rhynia have a similar life-cycle but have simple tracheids and so are a kind of vascular plant.

During the Devonian
Devonian
period, vascular plants diversified and spread to many different land environments. In addition to vascular tissues which transport water throughout the body, tracheophytes have an outer layer or cuticle that resists drying out . The sporophyte is the dominant generation, and in modern species develops leaves , stems and roots , while the gametophyte remains very small. Further information: Polysporangiophyte , Horneophytopsida
Horneophytopsida
, and Rhyniopsida
Rhyniopsida

LYCOPHYTES AND EUPHYLLOPHYTES

Lycopodiella inundata, a lycophyte Main article: Lycopodiophyta
Lycopodiophyta

All the vascular plants which disperse through spores were once thought to be related (and were often grouped as 'ferns and allies'). However, recent research suggests that leaves evolved quite separately in two different lineages. The lycophytes or lycopodiophytes – modern clubmosses, spikemosses and quillworts – make up less than 1% of living vascular plants. They have small leaves, often called 'microphylls' or 'lycophylls', which are borne all along the stems in the clubmosses and spikemosses, and which effectively grow from the base, via an intercalary meristem . It is believed that microphylls evolved from outgrowths on stems, such as spines, which later acquired veins (vascular traces).

Although the living lycophytes are all relatively small and inconspicuous plants, more common in the moist tropics than in temperate regions, during the Carboniferous
Carboniferous
period tree-like lycophytes (such as Lepidodendron
Lepidodendron
) formed huge forests that dominated the landscape.

The euphyllophytes, making up more than 99% of living vascular plant species, have large 'true' leaves (megaphylls), which effectively grow from the sides or the apex, via marginal or apical meristems. One theory is that megaphylls developed from three-dimensional branching systems by first 'planation' – flattening to produce a two dimensional branched structure – and then 'webbing' – tissue growing out between the flattened branches. Others have questioned whether megaphylls developed in the same way in different groups.

FERNS AND HORSETAILS

THIS SECTION NEEDS EXPANSION. You can help by adding to it . (March 2011)

Athyrium filix-femina , unrolling young frond Main article: Fern
Fern

Euphyllophytes are divided into two lineages: the ferns and horsetails (monilophytes) and the seed plants (spermatophytes). Like all the preceding groups, the monilophytes continue to use spores as their main method of dispersal. Traditionally, whisk ferns and horsetails were treated as distinct from 'true' ferns. Recent research suggests that they all belong together, although there are differences of opinion on the exact classification to be used. Living whisk ferns and horsetails do not have the large leaves (megaphylls) which would be expected of euphyllophytes. However, this has probably resulted from reduction, as evidenced by early fossil horsetails, in which the leaves are broad with branching veins.

Ferns are a large and diverse group, with some 12,000 species . A stereotypical fern has broad, much divided leaves, which grow by unrolling.

SEED PLANTS

Main article: Spermatophyte
Spermatophyte
Conifer forest in Northern California Large seed of a horse chestnut, Aesculus hippocastanum

Seed
Seed
plants, which first appeared in the fossil record towards the end of the Paleozoic
Paleozoic
era, reproduce using desiccation -resistant capsules called seeds . Starting from a plant which disperses by spores, highly complex changes are needed to produce seeds. The sporophyte has two kinds of spore-forming organs (sporangia). One kind, the megasporangium, produces only a single large spore (a megaspore). This sporangium is surrounded by one or more sheathing layers (integuments) which form the seed coat. Within the seed coat, the megaspore develops into a tiny gametophyte, which in turn produces one or more egg cells. Before fertilization, the sporangium and its contents plus its coat is called an 'ovule'; after fertilization a 'seed'. In parallel to these developments, the other kind of sporangium, the microsporangium, produces microspores. A tiny gametophyte develops inside the wall of a microspore, producing a pollen grain. Pollen
Pollen
grains can be physically transferred between plants by the wind or animals, most commonly insects . Pollen
Pollen
grains can also transfer to an ovule of the same plant, either with the same flower or between two flowers of the same plant (self-fertilization ). When a pollen grain reaches an ovule, it enters via a microscopic gap in the coat (the micropyle). The tiny gametophyte inside the pollen grain then produces sperm cells which move to the egg cell and fertilize it. Seed
Seed
plants include two groups with living members, the gymnosperms and the angiosperms or flowering plants. In gymnosperms, the ovules or seeds are not further enclosed. In angiosperms, they are enclosed in ovaries. A split ovary with a visible seed can be seen in the adjacent image. Angiosperms typically also have other, secondary structures, such as petals , which together form a flower .

Extant seed plants are divided into five groups: Gymnosperms

* Pinophyta
Pinophyta
- conifers * Cycadophyta - cycads * Ginkgophyta
Ginkgophyta
- ginkgo * Gnetophyta
Gnetophyta
- gnetophytes

Angiosperms

* Magnoliophyta – flowering plants

REFERENCES

* ^ Gray, J.; Chaloner, W.G. & Westoll, T.S. (1985), "The Microfossil Record of Early Land Plants: Advances in Understanding of Early Terrestrialization, 1970-1984 ", Philosophical Transactions of the Royal Society B: Biological Sciences, 309 (1138): 167–195, Bibcode :1985RSPTB.309..167G, doi :10.1098/rstb.1985.0077 * ^ Rubinstein, C.V.; Gerrienne, P.; De La Puente, G.S.; Astini, R.A. & Steemans, P. (2010), "Early Middle Ordovician
Ordovician
evidence for land plants in Argentina (eastern Gondwana)", New Phytologist, 188 (2): 365–9, PMID 20731783 , doi :10.1111/j.1469-8137.2010.03433.x * ^ Engler, A. 1892. Syllabus der Vorlesungen über specielle und medicinisch-pharmaceutische Botanik: Eine Uebersicht über das ganze Pflanzensystem mit Berücksichtigung der Medicinal- und Nutzpflanzen. Berlin: Gebr. Borntraeger. * ^ Pirani, J. R.; Prado, J. (2012). "Embryopsida, a new name for the class of land plants" (PDF). Taxon. 61 (5): 1096–1098. * ^ Barkley, Fred A. Keys to the phyla of organisms. Missoula, Montana. 1939. * ^ Rothmaler, Werner. Über das natürliche System der Organismen. Biologisches Zentralblatt. 67: 242-250. 1948. * ^ Barkley, Fred A. "Un esbozo de clasificación de los organismos." Revista de la Facultad Nacional de Agronomia, Universidad de Antioquia, Medellín. 10: 83-103, . * ^ Takhtajan, A. (1964). The taxa of the higher plants above the rank of order. Taxon 13(5): 160-164, . * ^ Cronquist, A.; Takhtajan, A.; Zimmermann, W. (1966). "On the Higher Taxa of Embryobionta" (PDF). Taxon. 15 (4): 129–134. doi :10.2307/1217531 . * ^ Whittaker, R. H. (1969). "New concepts of kingdoms or organisms" (PDF). Science. 163 (3863): 150–160. Bibcode :1969Sci...163..150W. PMID 5762760 . doi :10.1126/science.163.3863.150 . * ^ Margulis, L (1971). "Whittaker's five kingdoms of organisms: minor revisions suggested by considerations of the origin of mitosis". Evolution. 25: 242–245. doi :10.2307/2406516 . * ^ A B Niklas, K.J.; Kutschera, U. (2010), "The evolution of the land plant life cycle", New Phytologist, 185 (1): 27–41, PMID 19863728 , doi :10.1111/j.1469-8137.2009.03054.x . * ^ Pickett-Heaps, J. (1976). "Cell division in eucaryotic algae". BioScience. 26 (7): 445–450. doi :10.2307/1297481 . * ^ Mayr, E. (1990), "A natural system of organisms", Nature, Nature Publishing Group, 348 (6301): 491, Bibcode :1990Natur.348..491M, doi :10.1038/348491a0 * ^ https://archive.org/stream/systematischephy01haec#page/256/mode/2up * ^ Land plants divided and ruled : Nature News * ^ Phragmoplastin, green algae and the evolution of cytokinesis * ^ Invasions of the Algae
Algae
- ScienceNOW - News - Science * ^ All Land Plants
Plants
Evolved From Single Type of Algae, Scientists Say * ^ A B Becker, B. & Marin, B. (2009), " Streptophyte algae and the origin of embryophytes", Annals of Botany, 103 (7): 999–1004, PMC 2707909  , PMID 19273476 , doi :10.1093/aob/mcp044 * ^ Becker & Marin 2009 , p. 1001 * ^ A B Lewis, Louise A. & McCourt, R.M. (2004), " Green algae
Green algae
and the origin of land plants", Am. J. Bot., 91 (10): 1535–1556, PMID 21652308 , doi :10.3732/ajb.91.10.1535 * ^ Taylor, T.N.; Taylor, E.L. Boston: Academic Press, ISBN 978-0-12-373972-8 , p. 1027 * ^ Wodniok, Sabina; Brinkmann, Henner; Glöckner, Gernot; Heidel, Andrew J.; Philippe, Hervé; Melkonian, Michael & Becker, Burkhard (2011), "Origin of land plants: Do conjugating green algae hold the key?", BMC Evolutionary Biology, 11 (1): 104, PMC 3088898  , PMID 21501468 , doi :10.1186/1471-2148-11-104 * ^ Leliaert, Frederik; Verbruggen, Heroen & Zechman, Frederick W. (2011), "Into the deep: New discoveries at the base of the green plant phylogeny", BioEssays, 33 (9): 683–692, PMID 21744372 , doi :10.1002/bies.201100035 * ^ Wickett, Norman J.; Mirarab, Siavash; Nguyen, Nam; Warnow, Tandy; Carpenter, Eric; Matasci, Naim; Ayyampalayam, Saravanaraj; Barker, Michael S.; Burleigh, J. Gordon (2014-11-11). "Phylotranscriptomic analysis of the origin and early diversification of land plants". Proceedings of the National Academy of Sciences. 111 (45): E4859–E4868. ISSN 0027-8424 . PMC 4234587  . PMID 25355905 . doi :10.1073/pnas.1323926111 . * ^ Ruhfel, Brad R.; Gitzendanner, Matthew A.; Soltis, Pamela S. ; Soltis, Douglas E.; Burleigh, J. Gordon (2014-01-01). "From algae to angiosperms–inferring the phylogeny of green plants (Viridiplantae) from 360 plastid genomes". BMC Evolutionary Biology. 14: 23. ISSN 1471-2148 . PMC 3933183  . PMID 24533922 . doi :10.1186/1471-2148-14-23 . * ^ Vries, Jan de; Stanton, Amanda; Archibald, John M.; Gould, Sven B. (2016-02-16). " Streptophyte Terrestrialization in Light of Plastid Evolution". Trends in Plant
Plant
Science. 21 (6): 467–476. ISSN 1360-1385 . doi :10.1016/j.tplants.2016.01.021 . * ^ Qiu, Y.L.; Li, L.; Wang, B.; Chen, Z.; et al. (2006), "The deepest divergences in land plants inferred from phylogenomic evidence", Proceedings of the National Academy of Sciences, 103 (42): 15511–6, Bibcode :2006PNAS..10315511Q, PMC 1622854  , PMID 17030812 , doi :10.1073/pnas.0603335103 * ^ Crane, P.R.; Herendeen, P. & Friis, E.M. (2004), "Fossils and plant phylogeny", American Journal of Botany, 91 (10): 1683–99, PMID 21652317 , doi :10.3732/ajb.91.10.1683 , retrieved 2011-01-28 * ^ Rothwell, G.W. & Nixon, K.C. (2006), "How Does the Inclusion of Fossil Data Change Our Conclusions about the Phylogenetic History of Euphyllophytes?", International Journal of Plant
Plant
Sciences, 167 (3): 737–749, doi :10.1086/503298 * ^ Stevens, P.F., Angiosperm
Angiosperm
Phylogeny Website - Seed
Seed
Plant Evolution * ^ Hilton, Jason 2 , retrieved 2011-03-06 * ^ Lindley, J. (1830), Introduction to the Natural System of Botany, London: Longman, Rees, Orme, Brown, and Green, OCLC
OCLC
3803812 , p. xxxvi * ^ Banks, H.P. (1975), "Reclassification of Psilophyta", Taxon, 24 (4): 401–413, doi :10.2307/1219491 * ^ Kenrick, P. & Crane, P.R. (1997), The Origin and Early Diversification of Land Plants: A Cladistic Study, Washington, D.C.: Smithsonian Institution Press, ISBN 978-1-56098-730-7 * ^ Novíkov & Barabaš-Krasni (2015). "Modern plant systematics". Liga-Pres: 685. ISBN 978-966-397-276-3 . doi :10.13140/RG.2.1.4745.6164 . * ^ Anderson, Anderson & Cleal (2007). "Brief history of the gymnosperms: classification, biodiversity, phytogeography and ecology". Strelitzia. SANBI. 20: 280. ISBN 978-1-919976-39-6 . * ^ Pelletier (2012). "Empire biota: taxonomy and evolution 2nd ed". Lulu.com: 354. ISBN 1329874005 . * ^ Lecointre, Guillaume; Guyader, Hervé Le (2006). The Tree
Tree
of Life: A Phylogenetic Classification. Harvard University Press. ISBN 9780674021839 . * ^ A B Pryer, K.M.; Schuettpelz, E.; Wolf, P.G.; Schneider, H.; Smith, A.R. & Cranfill, R. (2004), "Phylogeny and evolution of ferns (monilophytes) with a focus on the early leptosporangiate divergences", American Journal of Botany, 91 (10): 1582–98, PMID 21652310 , doi :10.3732/ajb.91.10.1582 , retrieved 2011-01-29 , pp. 1582–3 * ^ Boyce, C.K. (2005), "The evolutionary history of roots and leaves", in Holbrook, N.M. & Zwieniecki, M.A., Vascular Transport in Plants, Burlington: Academic Press, pp. 479–499, ISBN 978-0-12-088457-5 , doi :10.1016/B978-012088457-5/50025-3 , retrieved 2011-02-06 * ^ Sahney, S.; Benton, M.J. & Falcon-Lang, H.J. (2010), "Rainforest collapse triggered Pennsylvanian tetrapod diversification in Euramerica", Geology, 38 (12): 1079–1082, Bibcode :2010Geo....38.1079S, doi :10.1130/G31182.1 * ^ Beerling, D.J. & Fleming, A.J. (2007), "Zimmermann's telome theory of megaphyll leaf evolution: a molecular and cellular critique", Current Opinion in Plant
Plant
Biology, 10 (1): 4–12, PMID 17141552 , doi :10.1016/j.pbi.2006.11.006 * ^ Tomescu, A. (2009), "Megaphylls, microphylls and the evolution of leaf development", Trends in Plant
Plant
Science, 14 (1): 5–12, PMID 19070531 , doi :10.1016/j.tplants.2008.10.008 * ^ Smith, A.R.; Pryer, K.M.; Schuettpelz, E.; Korall, P.; Schneider, H. ">(PDF), Taxon, 55 (3): 705–731, doi :10.2307/25065646 , archived from the original (PDF) on 2008-02-26, retrieved 2011-01-28

* ^ Rutishauser, R. (1999), "Polymerous Leaf
Leaf
Whorls in Vascular Plants: Developmental Morphology and Fuzziness of Organ Identities", International Journal of Plant
Plant
Sciences, 160 (6): 81–103, PMID 10572024 , doi :10.1086/314221 * ^ Chapman, Arthur D. (2009), Numbers of Living Species
Species
in Australia and the World. Report for the Australian Biological Resources Study, Canberra, Australia, retrieved 2011-03-11 * ^ Taylor, T.N.; Taylor, E.L. Boston: Academic Press, ISBN 978-0-12-373972-8 , pp. 508ff.

BIBLIOGRAPHY

* Raven, P.H.; Evert, R.F. & Eichhorn, S.E. (2005), Biology of Plants
Plants
(7th ed.), New York: W.H. Freeman, ISBN 978-0-7167-1007-3 * Stewart, W.N. & Rothwell, G.W. (1993), Paleobotany and the Evolution of Plants
Plants
(2nd ed.), Cambridge: Cambridge University Press, ISBN 978-0-521-38294-6 * Taylor, T.N.; Taylor, E.L. Boston: Academic Press, ISBN 978-0-12-373972-8

Wikispecies
Wikispecies
has information related to: EMBRYOPHYTA

* v * t * e

Botany
Botany

History of botany
History of botany

SUBDISCIPLINES

* Plant
Plant
systematics * Ethnobotany
Ethnobotany
* Paleobotany * Plant anatomy
Plant anatomy
* Plant ecology
Plant ecology

* Phytogeography
Phytogeography

* Geobotany * Flora
Flora

* Phytochemistry
Phytochemistry
* Plant pathology
Plant pathology
* Bryology * Phycology * Floristics * Dendrology
Dendrology

PLANT GROUPS

* Algae
Algae
* Archaeplastida
Archaeplastida
* Bryophyte
Bryophyte
* Non-vascular plants * Vascular plants * Spermatophytes * Pteridophyte
Pteridophyte
* Gymnosperm
Gymnosperm

* Angiosperm
Angiosperm
(flowering)

* Grasses

Plant
Plant
morphology (glossary )

PLANT CELLS

* Cell wall * Phragmoplast
Phragmoplast
* Plastid
Plastid
* Plasmodesmata
Plasmodesmata
* Vacuole
Vacuole

TISSUES

* Meristem

* Vascular tissue

* Vascular bundle
Vascular bundle

* Ground tissue
Ground tissue

* Mesophyll
Mesophyll

* Cork * Wood
Wood
* Storage organs

VEGETATIVE

* Root
Root
* Rhizoid * Bulb
Bulb
* Rhizome
Rhizome

* Shoot
Shoot

* Stem

* Leaf
Leaf

* Petiole * Cataphyll

* Bud
Bud
* Sessility

Reproductive (Flower)

* Flower
Flower
development

* Inflorescence
Inflorescence

* Umbel * Raceme * Bract
Bract
* Pedicellate

* Flower
Flower

* Whorl * Floral symmetry * Floral diagram
Floral diagram
* Floral formula

* Receptacle * Hypanthium
Hypanthium
(Floral cup)

* Perianth
Perianth

* Tepal
Tepal
* Petal
Petal
* Sepal
Sepal

* Sporophyll
Sporophyll

* Gynoecium
Gynoecium

* Ovary

* Ovule
Ovule

* Stigma

* Archegonium
Archegonium

* Androecium

* Stamen
Stamen
* Staminode * Pollen
Pollen
* Tapetum

* Gynandrium * Gametophyte
Gametophyte
* Sporophyte
Sporophyte
* Plant
Plant
embryo

* Fruit
Fruit

* Fruit
Fruit
anatomy * Berry * Capsule

* Seed
Seed

* Seed
Seed
dispersal * Endosperm
Endosperm

SURFACE STRUCTURES

* Epicuticular wax
Epicuticular wax
* Plant
Plant
cuticle * Epidermis * Stoma
Stoma
* Nectary
Nectary
* Trichome
Trichome
* Prickle

* Plant
Plant
physiology * Materials

* Nutrition

* Photosynthesis
Photosynthesis

* Chlorophyll
Chlorophyll

* Plant
Plant
hormone * Transpiration * Turgor
Turgor
pressure * Bulk flow * Aleurone
Aleurone
* Phytomelanin * Sugar
Sugar
* Sap
Sap
* Starch
Starch
* Cellulose
Cellulose

PLANT GROWTH AND HABIT

* Secondary growth
Secondary growth
* Woody plants * Herbaceous plants

* Habit

* Vines

* Lianas

* Shrubs

* Subshrubs

* Trees * Succulent plants

Reproduction

* Evolution * Ecology

* Alternation of generations

* Sporangium
Sporangium

* Spore
Spore

* Microsporangia

* Microspore
Microspore

* Megasporangium

* Megaspore

* Pollination

* Pollinators * Pollen
Pollen
tube

* Double fertilization
Double fertilization
* Germination
Germination
* Evolutionary development

* Evolutionary history

* timeline

* Hardiness zone
Hardiness zone

PLANT TAXONOMY

* History of plant systematics
History of plant systematics
* Herbarium
Herbarium
* Biological classification
Biological classification

* Botanical nomenclature
Botanical nomenclature

* Botanical name * Correct name * Author citation * International Code of Nomenclature for algae, fungi, and plants (ICN) * - for Cultivated Plants
Plants
(ICNCP)

* Taxonomic rank
Taxonomic rank
* International Association for Plant
Plant
Taxonomy (IAPT) * Plant
Plant
taxonomy systems

* Cultivated plant taxonomy

* Citrus taxonomy
Citrus taxonomy

* cultigen

* cultivar * Group * grex

PRACTICE

* Agronomy * Floriculture
Floriculture
* Forestry
Forestry
* Horticulture
Horticulture

* Lists * Related topics

* Botanical terms

* Botanists

* by author abbreviation

* Botanical expedition

* CATEGORY * COMMONS * PORTAL * WIKIPROJECT

* v * t * e

Classification of Archaeplastida
Archaeplastida
/ Plantae sensu lato

Domain Archaea Bacteria Eukaryota
Eukaryota
(Supergroup Plant
Plant
Hacrobia Heterokont Alveolata Rhizaria Excavata Amoebozoa Opisthokonta Animal Fungi )

Rhodophyta (red algae)

* Cyanidiophyceae * Porphyridiophyceae * Compsopogonophyceae * Stylonematophyceae * Rhodellophyceae * Bangiophyceae
Bangiophyceae
* Florideophyceae
Florideophyceae

Glaucocystophyta (glaucophytes)

* Glaucocystophyceae

* Glaucocystis * Cyanophora * Gloeochaete

Viridiplantae
Viridiplantae
(green algae border-left-width:2px;border-left-style:solid;width:100%;padding:0px">

CHLOROPHYTA

* Palmophyllales * Nephroselmidophyceae * Prasinophyceae
Prasinophyceae
* Pseudoscourfieldiales * Pyramimonadophyceae * Scourfieldiales * Pedinophyceae * Chlorodendrophyceae

* UTC clade

* Ulvophyceae
Ulvophyceae
* Trebouxiophyceae
Trebouxiophyceae
* Chlorophyceae

Streptophyta
Streptophyta
(charophytes , border-left-width:2px;border-left-style:solid;width:100%;padding:0px">

* Mesostigmatophyceae * Chlorokybophyceae * Klebsormidiophyceae

Phragmo- plasto- phyta

* Charophyceae
Charophyceae
* Coleochaetophyceae * Zygnematophyceae
Zygnematophyceae

Embryophyta (land plants)

Bryophytes
Bryophytes
(non-vascular)

* Marchantiophyta * Anthocerotophyta
Anthocerotophyta
* Bryophyta "Moss" * † Horneophytopsida
Horneophytopsida

Tracheophyta
Tracheophyta
(vascular)

Lycopodiophyta
Lycopodiophyta
(microphylls )

* † Zosterophyllopsida
Zosterophyllopsida
* † Sawdoniales * Isoetopsida
Isoetopsida
* Lycopodiopsida
Lycopodiopsida

Euphyllophyta (megaphylls )

Moniliformopses (ferns)

* † Cladoxylopsida
Cladoxylopsida
* † Stauropteridales * † Zygopteridales * Equisetopsida
Equisetopsida
* Psilotopsida
Psilotopsida
* Marattiopsida * Filicopsida

Spermatophyta
Spermatophyta
(seed plants)

* † Seed
Seed
ferns

* Gymnosperms

* Gnetopsida * Pinopsida * Cycadopsida * Ginkgoopsida

* Angiosperms or flowering plants

* Monocotyledon
Monocotyledon
* Eudicots
Eudicots
* Nymphaeales
Nymphaeales
* Austrobaileyales
Austrobaileyales
* Magnoliids
Magnoliids

OTHER

* † Trimerophytopsida
Trimerophytopsida
* † Progymnosperm

OTHER

* † Rhyniopsida
Rhyniopsida

† = extinct . See also the list of plant orders .

TAXON IDENTIFIERS

* Wd : Q192154 * EoL : 11823577 * Fossilworks : 250231 * NCBI : 3193

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Embryophyte
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