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Asarum Trinacriforme
''Asarum'' is a genus of plants in the birthwort family Aristolochiaceae, commonly known as wild ginger. ''Asarum'' is the genitive plural of the Latin ''āsa'' (an alternate form of ''āra'') meaning altar or sanctuary. Description ''Asarum'' is a genus of low-growing herbs distributed across the temperate zones of the Northern Hemisphere, with most species in East Asia (China, Japan, and Vietnam) and North America, and one species in Europe. Biogeographically, ''Asarum'' originated in Asia. They have characteristic kidney-shaped leaves, growing from creeping rhizomes, and bear small, axillary, brown or reddish flowers. The plant is called wild ginger because the rhizome tastes and smells similar to ginger root, but the two are not particularly related. The FDA warns against consuming ''Asarum'', as it is nephrotoxic and contains the potent carcinogen aristolochic acid. The birthwort family also contains the genus ''Aristolochia'', known for carcinogens. Wild ginger ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asarum Caudatum
''Asarum caudatum'' (British Columbia wild ginger, western wild ginger, or long-tailed wild ginger) is a plant native to rich moist forests of western North America. It has heart-shaped leaves and a three-lobed purplish flower. Description Growing from a long rhizome, the reniform (kidney/heart-shaped) leaves range from in length. The leaves are found in colonies or clusters as the rhizome spreads, forming mats. The leaves emit a ginger aroma when rubbed. Blooming from April to July (about a month earlier in British Columbia), the flower sits at the end of a leafstalk, often on the ground, hidden by the leaves. The flowers are hirsute (hairy), cup-shaped, and brown-purple to green-yellow, terminating in three, long, gracefully curved lobes. Similar species include '' A. hartwegii'', '' A. lemmonii'', and '' A. marmoratum''. Etymology ''Caudatum'' comes from the Latin ''cauda'', meaning tail. This refers to the tail-like shape of the flower's calyx. Distributi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shade Garden
Shade gardens are a type of garden planted and grown in areas with little or no direct sunlight. Shade gardens may occur naturally or by design under trees, as well as on the side of buildings or fences. This style of garden presents certain challenges, in part because only certain plants are able to grow in shady conditions and otherwise there is direct competition for sunlight. Very few edible plants grow well in shady conditions, so shade gardens are usually ornamental gardens, though growing flowers may also be difficult in shade. Light shade, also known as "dappled sunlight", may support growing herbs or some leaf vegetables, but in addition to lack of light, trees and other large plants which create shade gardens may negatively impact soil fertility. See also * List of garden types A wide range of garden types exist. Below is a list of examples. By country of origin *Chinese garden ** Cantonese garden ** Sichuanese garden *Dutch garden * Egyptian garden *Eng ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asarum Arifolium
''Hexastylis arifolia'', or the little brown jug, is a perennial wildflower in the family Aristolochiaceae found in the southeastern United States, from Louisiana to Virginia, inland as far as Kentucky. It is considered a threatened species in Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to .... Description ''Hexastylis arifolia'' is an evergreen, perennial herb with no above-ground stems, spreading by means of underground rhizomes. Leaves are hairless, of two sorts. Small, scale-like leaves adhere to the underground rhizomes, while larger green, heart-shaped leaves emerge above ground. Flowers are formed one at a time, on the ends of the rhizomes. References Aristolochiaceae Endemic flora of the United States Flora of the Southeastern United States Flora of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Synapomorphy
In phylogenetics, an apomorphy (or derived trait) is a novel character or character state that has evolved from its ancestral form (or plesiomorphy). A synapomorphy is an apomorphy shared by two or more taxa and is therefore hypothesized to have evolved in their most recent common ancestor. ) In cladistics, synapomorphy implies homology. Examples of apomorphy are the presence of erect gait, fur, the evolution of three middle ear bones, and mammary glands in mammals but not in other vertebrate animals such as amphibians or reptiles, which have retained their ancestral traits of a sprawling gait and lack of fur. Thus, these derived traits are also synapomorphies of mammals in general as they are not shared by other vertebrate animals. Etymology The word —coined by German entomologist Willi Hennig—is derived from the Ancient Greek words (''sún''), meaning "with, together"; (''apó''), meaning "away from"; and (''morphḗ''), meaning "shape, form". Clade analysis T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paraphyletic
In taxonomy (general), taxonomy, a group is paraphyletic if it consists of the group's most recent common ancestor, last common ancestor and most of its descendants, excluding a few Monophyly, monophyletic subgroups. The group is said to be paraphyletic ''with respect to'' the excluded subgroups. In contrast, a monophyletic group (a clade) includes a common ancestor and ''all'' of its descendants. The terms are commonly used in phylogenetics (a subfield of biology) and in the tree model of historical linguistics. Paraphyletic groups are identified by a combination of Synapomorphy and apomorphy, synapomorphies and symplesiomorphy, symplesiomorphies. If many subgroups are missing from the named group, it is said to be polyparaphyletic. The term was coined by Willi Hennig to apply to well-known taxa like Reptilia (reptiles) which, as commonly named and traditionally defined, is paraphyletic with respect to mammals and birds. Reptilia contains the last common ancestor of reptiles a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monophyletic
In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic groups are typically characterised by shared derived characteristics ( synapomorphies), which distinguish organisms in the clade from other organisms. An equivalent term is holophyly. The word "mono-phyly" means "one-tribe" in Greek. Monophyly is contrasted with paraphyly and polyphyly as shown in the second diagram. A ''paraphyletic group'' consists of all of the descendants of a common ancestor minus one or more monophyletic groups. A '' polyphyletic group'' is characterized by convergent features or habits of scientific interest (for example, night-active primates, fruit trees, aquatic insects). The features by which a polyphyletic group is differentiated from others are not inherited from a common ancestor. These definitions have tak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribosomal DNA
Ribosomal DNA (rDNA) is a DNA sequence that codes for ribosomal RNA. These sequences regulate transcription initiation and amplification, and contain both transcribed and non-transcribed spacer segments. In the human genome there are 5 chromosomes with nucleolus organizer regions: the acrocentric chromosomes 13 (RNR1), 14 ( RNR2), 15 ( RNR3), 21 (RNR4) and 22 (RNR5). The genes that are responsible for encoding the various sub-units of rRNA are located across multiple chromosomes in humans. But the genes that encode for rRNA are highly conserved across the domains, with only the copy numbers involved for the genes having varying numbers per species. In Bacteria, Archaea, and chloroplasts the rRNA is composed of different (smaller) units, the large (23S) ribosomal RNA, 16S ribosomal RNA and 5S rRNA. The 16S rRNA is widely used for phylogenetic studies. Eukaryotes The rRNA transcribed from the approximately 600 rDNA repeats forms the most abundant section of RNA found in cells ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internal Transcribed Spacer
Internal transcribed spacer (ITS) is the spacer DNA situated between the small-subunit ribosomal RNA (rRNA) and large-subunit rRNA genes in the chromosome or the corresponding transcribed region in the polycistronic rRNA precursor transcript. ITS across life domains In bacteria and archaea, there is a single ITS, located between the 16S and 23S rRNA genes. Conversely, there are two ITSs in eukaryotes: ITS1 is located between 18S and 5.8S rRNA genes, while ITS2 is between 5.8S and 28S (in opisthokonts, or 25S in plants) rRNA genes. ITS1 corresponds to the ITS in bacteria and archaea, while ITS2 originated as an insertion that interrupted the ancestral 23S rRNA gene. Organization In bacteria and archaea, the ITS occurs in one to several copies, as do the flanking 16S and 23S genes. When there are multiple copies, these do not occur adjacent to one another. Rather, they occur in discrete locations in the circular chromosome. It is not uncommon in bacteria to carry tRN ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hexastylis
''Hexastylis'' or heartleaf is a segregate of the genus '' Asarum'', in the family Aristolochiaceae. The group comprises ten species endemic to southeastern North America. It is a perennial, evergreen, herbaceous plant with leaves and flowers arising directly from the rhizomes. Hexastylis was once recognized at the level of genus, and in some floral treatments still is, yet it has been shown through morphological and molecular evidence that it is rooted within the genus '' Asarum''. Species There are eighteen species of ''Hexastylis'': * ''Hexastylis arifolia'' * ''Hexastylis callifolia'' * ''Hexastylis chueyi'' * ''Hexastylis contracta'' * ''Hexastylis finzelii'' * ''Hexastylis harperi'' * ''Hexastylis heterophylla'' * ''Hexastylis lewisii'' * ''Hexastylis minor'' * ''Hexastylis naniflora'' * ''Hexastylis rhombiformis'' * ''Hexastylis rollinsiae'' * ''Hexastylis rosei'' * ''Hexastylis ruthii ''Hexastylis'' or heartleaf is a segregate of the genus '' Asarum'', in the fam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heterotropa (plant)
''Heterotropa'' is a monotypic moth genus in the subfamily Arctiinae. Its single species, ''Heterotropa fastosa'', is found in Australia's Northern Territory and Queensland ) , nickname = Sunshine State , image_map = Queensland in Australia.svg , map_caption = Location of Queensland in Australia , subdivision_type = Country , subdivision_name = Australia , established_title = Before federation , established_ .... Both the genus and species were first described by Turner in 1940. The forewings have a bold pattern of yellow, brown and white. References * Lithosiini Monotypic moth genera Moths of Australia {{Lithosiini-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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