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Dendrolycopodium
The genus ''Dendrolycopodium'' is a clubmoss genus in the family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae. Some sources do not recognize the genus, sinking it into ''Lycopodium''. It is treated as section ''Obscura'' when retained within ''Lycopodium''. The genus includes a discrete group of plants with similar morphologies. All have erect to semi-erect, branched stems. Species , the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species: * ''Dendrolycopodium dendroideum'' (Michx.) A.Haines (including ''D. verticale'') – northern North America, eastern Asia * ''Dendrolycopodium hickeyi'' (W.H.Wagner, Beitel & R.C.Moran) A.Haines – northeastern North America * '' Dendrolycopodium juniperoideum'' (Sw.) A.Haines – northeast Asia (central Siberia) * ''Dendrolycopodium obscurum ''Dendrolycopodium obscurum'', synonym ''Lycopodium obscurum'', commonly called rare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrolycopodium Obscurum
''Dendrolycopodium obscurum'', synonym ''Lycopodium obscurum'', commonly called rare clubmoss, ground pine, or princess pine, is a North American species of clubmoss in the family Lycopodiaceae. It is a close relative of other species such as '' D. dendroideum'' and '' D. hickeyi'', also treelike. It is native to the eastern United States and southeastern Canada from Georgia to Minnesota to Nova Scotia. It grows in the understory of temperate coniferous and deciduous forests, where it is involved in seral secondary succession, growing in clonal colonies some years after disturbance has occurred. It has also been found in Japan, Taiwan, Korea, Russian Far East, and northeastern China. Description ''Dendrolycopodium obscurum'' is known for the superficial resemblance of its sporophyte to various conifers. However, its above-ground parts are rarely more than 15 cm (6 inches) tall. Its main stem is actually a subterranean, creeping rhizome, which grows about 6 cm (2.4 inch ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrolycopodium Juniperoideum
The genus ''Dendrolycopodium'' is a clubmoss genus in the family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae. Some sources do not recognize the genus, sinking it into ''Lycopodium''. It is treated as section ''Obscura'' when retained within ''Lycopodium''. The genus includes a discrete group of plants with similar morphologies. All have erect to semi-erect, branched stems. Species , the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species: * ''Dendrolycopodium dendroideum'' (Michx.) A.Haines (including ''D. verticale'') – northern North America, eastern Asia * ''Dendrolycopodium hickeyi'' (W.H.Wagner, Beitel & R.C.Moran) A.Haines – northeastern North America * '' Dendrolycopodium juniperoideum'' (Sw.) A.Haines – northeast Asia (central Siberia) * ''Dendrolycopodium obscurum ''Dendrolycopodium obscurum'', synonym ''Lycopodium obscurum'', commonly called rare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrolycopodium Verticale
The genus ''Dendrolycopodium'' is a clubmoss genus in the family Lycopodiaceae. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), it is placed in the subfamily Lycopodioideae. Some sources do not recognize the genus, sinking it into ''Lycopodium''. It is treated as section ''Obscura'' when retained within ''Lycopodium''. The genus includes a discrete group of plants with similar morphologies. All have erect to semi-erect, branched stems. Species , the ''Checklist of Ferns and Lycophytes of the World'' recognized the following species: * ''Dendrolycopodium dendroideum'' (Michx.) A.Haines (including ''D. verticale'') – northern North America, eastern Asia * ''Dendrolycopodium hickeyi'' (W.H.Wagner, Beitel & R.C.Moran) A.Haines – northeastern North America * '' Dendrolycopodium juniperoideum'' (Sw.) A.Haines – northeast Asia (central Siberia) * ''Dendrolycopodium obscurum ''Dendrolycopodium obscurum'', synonym ''Lycopodium obscurum'', commonly called rare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrolycopodium Hickeyi
''Dendrolycopodium hickeyi'' (synonym ''Lycopodium hickeyi'') known as Hickey's tree club-moss or Pennsylvania clubmoss, is a North American species of clubmoss in the family Lycopodiaceae. It is native to eastern and Central Canada (from Newfoundland to Ontario with isolated populations in Saskatchewan) and the eastern and north-central United States (from Maine west to Minnesota and south as far as Tennessee and North Carolina). The genus ''Dendrolycopodium'' is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), but not in other classifications, which submerge the genus in a larger ''Lycopodium''. Description Similar to other members of the genus, the sporophyte of ''Dendrolycopodium hickeyi'' resembles the seedlings of some conifers. The upright sporophytes grow from subterranean horizontal stems, often causing tree club-mosses to be found in clusters. The upright sporophytes have small, green microphylls (leaves) extending from the ground to the tip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dendrolycopodium Dendroideum
''Dendrolycopodium dendroideum'', synonym ''Lycopodium dendroideum'', known as tree groundpine, is a North American species of clubmoss. It is part of a complex of species colloquially known as groundpine, which taxa were formerly lumped into the species '' Lycopodium obscurum''. The species is native to Russia and also to the colder parts of North America (all states and provinces in Canada except Nunavut; northern and east-central United States including Alaska). The genus ''Dendrolycopodium'' is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I), but not in other classifications, which submerge the genus in ''Lycopodium''. ''Dendrolycopodium dendroideum'' prefers humus-rich, sandy, moist but not completely saturated soils. It is very similar to '' D. obscurum'' except for side shoots that are round in cross-section rather than flat, and having leaves all the same size. Uses Historically, this and other related clubmosses had been collected for de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycopodium
''Lycopodium'' (from Greek ''lykos'', wolf and ''podion'', diminutive of ''pous'', foot) is a genus of clubmosses, also known as ground pines or creeping cedars, in the family Lycopodiaceae. Two very different circumscriptions of the genus are in use. In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), ''Lycopodium'' is one of nine genera in the subfamily Lycopodioideae, and has from nine to 15 species. In other classifications, the genus is equivalent to the whole of the subfamily, since it includes all of the other genera. More than 40 species are accepted. Description They are flowerless, vascular, terrestrial or epiphytic plants, with widely branched, erect, prostrate, or creeping stems, with small, simple, needle-like or scale-like leaves that cover the stem and branches thickly. The leaves contain a single, unbranched vascular strand, and are microphylls by definition. The kidney-shaped (reniform) spore-cases (sporangia) contain spores of one kind only, ( i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycopodioideae
''Lycopodioideae'' is a subfamily in the family Lycopodiaceae in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). It is equivalent to a broad circumscription of the genus ''Lycopodium'' in other classifications. Like all lycophytes, members of the Lycopodioideae reproduce by spores. The oldest fossils of modern members of the family date to the Early Cretaceous. Description The sporophytes of Lycopodioideae species are relatively short herbaceous plants. They have stems with pseudomonopodial branching in which unequal binary branching produces the appearance of a main stem with secondary side branches. The main stems are indeterminate and of various forms, including rhizomatous, creeping, trailing and climbing. They usually form roots at intervals along their length. The branches are usually determinate (i.e. of limited growth and extension). Sporangia are borne at the bases or in the axils of special spore-bearing leaves (sporophylls), which are notably different ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycopodiaceae
The Lycopodiaceae (class Lycopodiopsida, order Lycopodiales) are an old family of vascular plants, including all of the core clubmosses and firmosses, comprising 16 accepted genera and about 400 known species. This family originated about 380 million years ago in the early Devonian, though the diversity within the family has been much more recent. "Wolf foot" is another common name for this family due to the resemblance of either the roots or branch tips to a wolf's paw. Description Members of Lycopodiaceae are not spermatophytes and so do not produce seeds. Instead they produce spores, which are oily and flammable, and are the most economically important aspects of these plants. The spores are of one size (i.e. the plants are isosporous) and are borne on a specialized structure at the apex of a shoot called a strobilus (plural: strobili), which resembles a tiny battle club, from which the common name derives. Members of the family share the common feature of having a microphyll, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Species
In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. Other ways of defining species include their karyotype, DNA sequence, morphology, behaviour or ecological niche. In addition, paleontologists use the concept of the chronospecies since fossil reproduction cannot be examined. The most recent rigorous estimate for the total number of species of eukaryotes is between 8 and 8.7 million. However, only about 14% of these had been described by 2011. All species (except viruses) are given a two-part name, a "binomial". The first part of a binomial is the genus to which the species belongs. The second part is called the specific name or the specific epithet (in botanical nomenclature, also sometimes i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Josef Ludwig Holub
The Professor Josef Ludwig Holub (5 February 1930 in Mladá Boleslav, (now Czech Republic) – 23 July 1999) was a Czech botanist who described a number of new species, worked on systematic reorganization of botanical groups, and contributed greatly to the study of European flora. Biography Josef Holub studied at Charles University in Prague, becoming a lecturer in botany in 1953. He co-founded the Czech Institute of Botany where he worked for many years. He also helped create the Department of Biosystematics, and the journal ''Folia'', published by the "Geobotanical and Phytotaxonomic Institute. In 1991 he was named president of the Czech Botanical Society. He participated in many botanical field studies in central Europe. Work He worked on vascular plant taxonomy. He contributed to economic botany, especially with his work on the flora of Slovakia and the Czech Republic. *Holub, J et al. 1967. "Sobrevista de las unidades de vegetación superior de Checoslovaquia", ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lycopodiopsida
Lycopodiopsida is a class of vascular plants known as lycopods, lycophytes or other terms including the component lyco-. Members of the class are also called clubmosses, firmosses, spikemosses and quillworts. They have dichotomously branching stems bearing simple leaves called microphylls and reproduce by means of spores borne in sporangia on the sides of the stems at the bases of the leaves. Although living species are small, during the Carboniferous, extinct tree-like forms formed huge forests that dominated the landscape and contributed to coal deposits. The nomenclature and classification of plants with microphylls varies substantially among authors. A consensus classification for extant (living) species was produced in 2016 by the Pteridophyte Phylogeny Group (PPG I), which places them all in the class Lycopodiopsida, which includes the classes Isoetopsida and Selaginellopsida used in other systems. (See Table 2.) Alternative classification systems have used ranks fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
