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Catamixis
''Catamixis'' is a genus assigned to the family Asteraceae, with only one known species, ''Catamixis baccharoides'', a low to medium height shrub. It is native to a very small area of western Nepal and northern India in the Himalayas. It has spoon-shaped, leathery leaves with rounded teeth, set alternately along straight, shyly branching stems. They carry many flower heads about long, with a few creamy white florets, sometimes with a hint of violet, in corymbs at the end of the branches. Flowers and fruits can be found between March and May. Its vernacular name in Hindi is विषपत्री (vishpatri) or विश्पत्र (vishpatra). Description ''Catamixis baccharoides'' is a shrub high, with straight, shyly branching stems, which are circular in cross-section, initially covered in silky hairs pressed to the surface, but later becoming hairless, carrying alternately set leaves close together, which leave distinct marks after being shed. The leaves are leather ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lactuceae
The Cichorieae (also called Lactuceae) are a tribe in the plant family Asteraceae that includes 93 genera, more than 1,600 sexually reproductive species and more than 7,000 apomictic species. They are found primarily in temperate regions of the Eastern Hemisphere. Cichorieae all have milky latex and flowerheads that only contain one type of floret. The genera ''Gundelia'' and ''Warionia'' only have disk florets, while all other genera only have ligulate florets. The genera that contain most species are ''Taraxacum'' (Crepidinae subtribe) with about 1,600 apomictic species, ''Hieracium'' with about 770 sexually reproducing and 5,200 apomictic species, and ''Pilosella'' with 110 sexually reproducing and 700 apomictic species (both Hieraciinae). Well-known members include lettuce, chicory, dandelion, and salsify. Description Most species are herbaceous, perennial, short-lived or annual plants, rarely subshrubs, shrubs or vines. All Cichorieae-species have latex canals in both t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pertyeae
The Pertyoideae are a subfamily of the family Asteraceae of the flowering plants. It comprises a single tribe, Pertyeae, of six genera Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s .... References External links Tolweb Pertyoideae Asterales subfamilies {{Asteraceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Thomson (botanist)
Thomas Thomson (4 December 1817 – 18 April 1878) was a British surgeon with the British East India Company before becoming a botanist. He was a friend of Joseph Dalton Hooker and helped write the first volume of ''Flora Indica''. With Hooker he distributed the exsiccata-like series ''Herbarium Indiae orientalis''. He was born in Glasgow the son of Thomas Thomson, chemistry professor at Glasgow University. He qualified as an M.D. at Glasgow University in 1839, as was appointed Assistant Surgeon in the Bengal Army 21 December 1839. He served during the campaign in Afghanistan 1839-1842 being present at the capture of Ghazni in 1839 and was taken prisoner at Ghazni in March 1842 but was released 21 September 1842. He served in the Sutlej campaign, 1845–46, being present at Firuzshahr, and in the second Sikh war, 1848–49. During 1847–48, Thomson served on the Kashmir Boundary Commission under the leadership of Alexander Cunningham. ( Henry Strachey was the other commissione ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucomeris
''Leucomeris'' is a genus of Asian flowering plant in the family Asteraceae. ; Species * ''Leucomeris decora'' Kurz - Manipur, Mizoram, Myanmar, Thailand, Vietnam * ''Leucomeris spectabilis'' D.Don - Uttar Pradesh, Uttarakhand, Nepal ; formerly included see ''Pertya Vernonia'' * ''Leucomeris celebica'' (Blume) Blume ex DC.- ''Vernonia arborea'' Buch.-Ham. * ''Leucomeris glabra'' Blume ex DC. - ''Vernonia arborea'' Buch.-Ham. * ''Leucomeris javanica'' Blume ex DC. - ''Vernonia arborea'' Buch.-Ham. * ''Leucomeris scandens'' (Thunb. ex Murray) Sch.Bip. - ''Pertya scandens'' (Thunb. ex Thunb.) Sch.Bip. References Leucomeris, Asteraceae genera Taxonomy articles created by Polbot Flora of the Indomalayan realm {{asteraceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asteroideae
Asteroideae is a subfamily of the plant family Asteraceae. It contains about 70% of the species of the family. It consists of several tribes, including Astereae, Calenduleae, Eupatorieae, Gnaphalieae, Heliantheae, Senecioneae and Tageteae. Asteroideae contains plants found all over the world, many of which are shrubby. There are about 1,135 genera and 17,200 species within this subfamily; the largest genera by number of species are '' Helichrysum'' (500–600) and '' Artemisia'' (550). Asteroideae is said to date back to approximately 46–36.5 million years ago. Common characteristics This family will often have radiate style heads but some could have discoid or disciform. They contain ray florets that are three lobed and are also considered perfect flower implying that it is bisexual. Many contain stigmatic surfaces that are separated by two marginal bands and terminal sterile appendages with sweeping hairs. Taxonomy This subfamily is composed of 21 tribes that are b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corymbioideae
''Corymbium'' is a genus of flowering plants in the daisy family comprising nine species. It is the only genus in the subfamily Corymbioideae and the tribe Corymbieae. The species have leaves with parallel veins, strongly reminiscent of monocots, in a rosette and compounded inflorescences may be compact or loosely composed racemes, panicles or corymbs. Remarkable for species in the daisy family, each flower head contains just one, bisexual, mauve, pink or white disc floret within a sheath consisting of just two large involucral bracts. The species are all endemic to the Cape Floristic Region of South Africa, where they are known as plampers. Description The species of ''Corymbium'' are monoecious, stemless, perennial, herbaceous plants of high, that grow in tufts and look like a monocotyledon as long as they are not flowering. The plants have a fibrous rhizome that is covered the persisting bases of old leaves and long, soft, silky hairs. Most parts of the plants may be cove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cichorioideae
The Cichorioideae are a subfamily of the family Asteraceae of flowering plants. Familiar members of Cichorioideae include lettuce, dandelions, chicory and '' Gazania'' species. The subfamily comprises about 240 genera and about 2900 species. It is heterogeneous and hard to characterize except with molecular characters. Taxonomy The subfamily as understood in 1998 turned out to be paraphyletic, based on studies of DNA sequences, so a number of tribes were moved to new subfamilies. Names for the new subfamilies were published in 2002. In 2004, 2007, and 2008, molecular phylogenetic studies further clarified relationships within Cichorioideae.Sterling C. Keeley, Zac H. Forsman, and Raymund Chan. 2007. "A phylogeny of the "evil tribe" (Vernonieae: Compositae) reveals Old/New World long distance dispersal: Support from separate and combined congruent datasets (''trn''L-F, ''ndh''F, ITS)". ''Molecular Phylogenetics and Evolution'' 44(1):89-103.Jose L. Panero and Vicki A. Funk. 2008. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gymnarrhenoideae
Gymnarrhenoideae is a subfamily within the family Asteraceae, with only one tribe, the Gymnarrheneae. Two very different species have been assigned to it, '' Gymnarrhena micrantha'', a winter annual from the deserts of North-Africa and the Middle-East, and '' Cavea tanguensis'', a perennial herb that grows on scree near streams and glaciers in the Eastern Himalayas. These species have very little in common, other than having two types of flower heads and sharing a tendency towards dioecism. Both also have basal leaf rosettes, stretched leaves, with few spaced teeth on the margin, and both lack spines and latex. Taxonomy The subfamily Gymnarrhenoideae and tribe Gymnarrheneae were erected in 2009 by Jose Panero and Vicki Funk to accommodate the isolated position of ''Gymnarrhena'' that is suggested by genetic analyses. A later analysis including rare species from China illustrated that ''Cavea'' is its sister taxon. Phylogeny Based on recent genetic analysis, it is now general ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast DNA
Chloroplast DNA (cpDNA), also known as plastid DNA (ptDNA) is the DNA located in chloroplasts, which are photosynthetic organelles located within the cells of some eukaryotic organisms. Chloroplasts, like other types of plastid, contain a genome separate from that in the cell nucleus. The existence of chloroplast DNA was identified biochemically in 1959, and confirmed by electron microscopy in 1962. The discoveries that the chloroplast contains ribosomes and performs protein synthesis revealed that the chloroplast is genetically semi-autonomous. The first complete chloroplast genome sequences were published in 1986, ''Nicotiana tabacum'' (tobacco) by Sugiura and colleagues and '' Marchantia polymorpha'' (liverwort) by Ozeki et al. Since then, tens of thousands of chloroplast genomes from various species have been sequenced. Molecular structure Chloroplast DNAs are circular, and are typically 120,000–170,000 base pairs long. They can have a contour length of around 30–60 mi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base Pair
A base pair (bp) is a fundamental unit of double-stranded nucleic acids consisting of two nucleobases bound to each other by hydrogen bonds. They form the building blocks of the DNA double helix and contribute to the folded structure of both DNA and RNA. Dictated by specific hydrogen bonding patterns, "Watson–Crick" (or "Watson–Crick–Franklin") base pairs (guanine–cytosine and adenine–thymine) allow the DNA helix to maintain a regular helical structure that is subtly dependent on its nucleotide sequence. The Complementarity (molecular biology), complementary nature of this based-paired structure provides a Redundancy (information theory), redundant copy of the genetic information encoded within each strand of DNA. The regular structure and data redundancy provided by the DNA double helix make DNA well suited to the storage of genetic information, while base-pairing between DNA and incoming nucleotides provides the mechanism through which DNA polymerase replicates DNA and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dansk Botanisk Arkiv
''Dansk Botanisk Arkiv'' was a Danish scientific journal or monograph series concerning botany, issued by the Danish Botanical Society. It was published from 1913 to 1980. Articles were written in Danish, German, English and French. The synonym Res Botanicae Danicae was printed on the front page of some issues. In 1980, it was fused with '' Botaniska Notiser Supplement'' under the name '' Opera Botanica'', which since then has been the monograph series of the '' Nordic Journal of Botany''. External links Dansk Botanisk Arkivat HathiTrust HathiTrust Digital Library is a large-scale collaborative repository of digital content from research libraries. Its holdings include content digitized via Google Books and the Internet Archive digitization initiatives, as well as content digit ... Digital Library Dansk Botanisk Arkivat Botanical Scientific Journals 1913 establishments in Denmark Botany journals Publications established in 1913 {{botany-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Evolutionary Grade
A grade is a taxon united by a level of morphological or physiological complexity. The term was coined by British biologist Julian Huxley, to contrast with clade, a strictly phylogenetic unit. Phylogenetics The concept of evolutionary grades arises in the context of phylogenetics: the study of the evolutionary history and relationships among or within groups of organisms. These relationships are determined by phylogenetic inference methods that focus on observed heritable traits, such as DNA sequences, protein amino acid sequences, or morphology. The result of such an analysis is a phylogenetic tree—a diagram containing a hypothesis of relationships that reflects the evolutionary history of a group of organisms. Definition of an evolutionary grade An evolutionary grade is a group of species united by morphological or physiological traits, that has given rise to another group that has major differences from the ancestral group's condition, and is thus not considered p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
