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Rhodiola Sachalinensis
''Rhodiola'' is a genus of perennial plants in the family Crassulaceae that resemble ''Sedum'' and other members of the family. Like sedums, ''Rhodiola'' species are often called stonecrops. Some authors merge ''Rhodiola'' into ''Sedum''. ''Rhodiola'' species grow in high-altitude and other cold regions of the Northern Hemisphere. ''Plants of the World Online'' gives the number of accepted species as 74, the Angiosperm Phylogeny Website gives it as 90, and the ''Flora of China'' gives it as about 90, with 55 in China and 16 endemic there. ''Flora of North America'' lists only three species in the United States and Canada. Description Among the distinguishing characters of the genus are two series of stamens totaling twice the number of petals; free or nearly free petals (not joined in a tube); a stout rhizome from whose axils the flowering stems rise; and a basal rosette of leaves. This genus contains the only species of Crassulaceae that have unisexual flowers. Phyt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodiola Pachyclados
''Rhodiola pachyclados'', the gray stonecrop, is a species of succulent flowering plant in the family Crassulaceae. It is an evergreen, succulent plant native to Pakistan and Afghanistan, but widely cultivated as an ornamental plant. It was formerly included in the genus ''Sedum''. Taxonomy ''Rhodiola pachyclados'' was originally described as ''Sedum pachyclados'' by J. E. T. Aitchison and William Hemsley (botanist), William Hemsley in 1880. Hideaki Ohba transferred it from ''Sedum'' to a new genus, ''Rhodiola'', in 1976. ''Rhodiola pachyclados'' looks somewhat like plants in the genus ''Rosularia'', but it can be identified by its broad-based radical leaves. It also differs from ''Rhodiola primuloides'', of which it was once considered a subspecies, by having shallowly lobed radical leaves, petals with smooth edges, and flower clusters containing 3–8 flowers. Description ''Rhodiola pachyclados'' grows 2–3 cm tall and spreads through thin, underground stems called rhizomes, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodiola Integrifolia
''Rhodiola integrifolia'' is a species of flowering plant in the stonecrop family known by the common names ledge stonecrop, western roseroot, and king's crown. It is native to north-easternmost Russia, including Kamchatka, and western North America, where it grows in mountainous habitat in subalpine and alpine climates, including meadows, cliffs, and talus. It is a perennial herb producing a stout stem from a fleshy, branching caudex, reaching a maximum height near 30 centimeters. The fleshy leaves are alternately arranged on the stem, widely lance-shaped to oval and pointed, flat but upcurved toward the tip, reaching 2.5 centimeters long. They are green when new and age to orange, rose, or red. The inflorescence is a dense cyme of up to 50 flowers with fleshy petals in shades of bright red to deep purple. The fruits are red, rounded ovals with pointed tips. There are several subspecies of this plant, with one, ssp. ''leedyi'', very rare and limited to a few populations in Min ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodiola Crenulata
''Rhodiola crenulata'' is a species of flowering plant in the family Crassulaceae The Crassulaceae (, from Latin ''crassus'', thick), also known as the crassulas, the stonecrops or the orpine family, are a diverse Family (biology), family of dicotyledon angiosperms primarily characterized by succulent leaves and a form of phot ..., native to the Himalayas. A geophyte usually tall, it is typically found at elevations from above sea level. Its genome has been sequenced. References crenulata Flora of West Himalaya Flora of Nepal Flora of East Himalaya Flora of Tibet Flora of Qinghai Flora of South-Central China Plants described in 1976 {{Crassulaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monophyly
In biological cladistics for the classification of organisms, monophyly is the condition of a taxonomic grouping being a clade – that is, a grouping of organisms which meets these criteria: # the grouping contains its own most recent common ancestor (or more precisely an ancestral population), i.e. excludes non-descendants of that common ancestor # the grouping contains all the descendants of that common ancestor, without exception Monophyly is contrasted with paraphyly and polyphyly as shown in the second diagram. A ''paraphyletic'' grouping meets 1. but not 2., thus consisting of the descendants of a common ancestor, excepting one or more monophyletic subgroups. A ''polyphyletic'' grouping meets neither criterion, and instead serves to characterize convergent relationships of biological features rather than genetic relationships – for example, night-active primates, fruit trees, or aquatic insects. As such, these characteristic features of a polyphyletic grouping are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudosedum
''Pseudosedum'' is a genus of flowering plants in the family Crassulaceae native to Central Asia and Siberia. Species Species in the genus include: * '' Pseudosedum acutisepalum'' C.-A.Jansson * '' Pseudosedum affine'' (Schrenk) A.Berger * '' Pseudosedum bucharicum'' Boriss. * '' Pseudosedum campanuliflorum'' Boriss. * '' Pseudosedum condensatum'' Boriss. * '' Pseudosedum fedtschenkoanum'' Boriss. * '' Pseudosedum ferganense'' Boriss. * '' Pseudosedum kamelinii'' Palanov * '' Pseudosedum karatavicum'' Boriss. * '' Pseudosedum koelzii'' C.-A.Jansson * '' Pseudosedum kuramense'' Boriss. * '' Pseudosedum lievenii'' (Ledeb.) A.Berger * '' Pseudosedum longidentatum'' Boriss. * '' Pseudosedum multicaule'' (Boiss. & Buhse) Boriss. Ecology It is an important host for the larva of the Central Asian butterfly ''Parnassius apollonius ''Parnassius apollonius'' is a member of the snow Apollo genus ''Parnassius'' of the swallowtail family, Papilionidae. It is found in central and south Kazak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sister Group
In phylogenetics, a sister group or sister taxon, also called an adelphotaxon, comprises the closest relative(s) of another given unit in an evolutionary tree. Definition The expression is most easily illustrated by a cladogram: Taxon A and taxon B are sister groups to each other. Taxa A and B, together with any other extant or extinct descendants of their most recent common ancestor (MRCA), form a monophyletic group, the clade AB. Clade AB and taxon C are also sister groups. Taxa A, B, and C, together with all other descendants of their MRCA form the clade ABC. The whole clade ABC is itself a subtree of a larger tree which offers yet more sister group relationships, both among the leaves and among larger, more deeply rooted clades. The tree structure shown connects through its root to the rest of the universal tree of life. In cladistic standards, taxa A, B, and C may represent specimens, species, genera, or any other taxonomic units. If A and B are at the same taxono ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sempervivoideae
Sempervivoideae is the largest of three subfamilies in the Saxifragales family Crassulaceae, with about 20–30 genera with succulent leaves. Unlike the two smaller subfamilies, it is distributed in temperate climates. The largest genus in this subfamily is ''Sedum'', with about 470 species. Description Succulent leaved plants. Unlike the other two smaller subfamilies, which are highly derived, Sempervivoideae retain the basic features of the family Crassulaceae. The Sempervivoideae contain many familiar horticultural plants, such as ''Sedum''. Taxonomy Sempervivoideae has taxonomic priority over its synonym, Sedoideae, and is related to the other Crassulaceae subfamilies, as shown in this cladogram, although Messerschmid and colleagues (2020) state that these three subfamily clades are successive sisters, rather than Sempervivoideae being a direct sister only to Kalanchoideae. Subdivisions Six clades within the Subfamily Sempervivoideae have been segregated into fi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetic
Molecular phylogenetics () is the branch of phylogeny that analyzes genetic, hereditary molecular differences, predominantly in DNA sequences, to gain information on an organism's evolutionary relationships. From these analyses, it is possible to determine the processes by which diversity among species has been achieved. The result of a molecular phylogenetic analysis is expressed in a phylogenetic tree. Molecular phylogenetics is one aspect of molecular systematics, a broader term that also includes the use of molecular data in taxonomy and biogeography. Molecular phylogenetics and molecular evolution correlate. Molecular evolution is the process of selective changes (mutations) at a molecular level (genes, proteins, etc.) throughout various branches in the tree of life (evolution). Molecular phylogenetics makes inferences of the evolutionary relationships that arise due to molecular evolution and results in the construction of a phylogenetic tree. History The theoretical fra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Axils
A leaf (: leaves) is a principal appendage of the stem of a vascular plant, usually borne laterally above ground and specialized for photosynthesis. Leaves are collectively called foliage, as in "autumn foliage", while the leaves, stem, flower, and fruit collectively form the shoot system. In most leaves, the primary photosynthetic tissue is the palisade mesophyll and is located on the upper side of the blade or lamina of the leaf, but in some species, including the mature foliage of ''Eucalyptus'', palisade mesophyll is present on both sides and the leaves are said to be isobilateral. The leaf is an integral part of the stem system, and most leaves are flattened and have distinct upper ( adaxial) and lower ( abaxial) surfaces that differ in color, hairiness, the number of stomata (pores that intake and output gases), the amount and structure of epicuticular wax, and other features. Leaves are mostly green in color due to the presence of a compound called chlorophyll wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Plant Stems
A stem is one of two main structural axes of a vascular plant, the other being the root. It supports leaves, flowers and fruits, transports water and dissolved substances between the roots and the shoots in the xylem and phloem, engages in photosynthesis, stores nutrients, and produces new living tissue. The stem can also be called the culm, halm, haulm, stalk, or thyrsus. The stem is normally divided into nodes and internodes: * The nodes are the points of attachment for leaves and can hold one or more leaves. There are sometimes axillary buds between the stem and leaf which can grow into branches (with leaves, conifer cones, or flowers). Adventitious roots (e.g. brace roots) may also be produced from the nodes. Vines may produce tendrils from nodes. * The internodes distance one node from another. The term "shoots" is often confused with "stems"; "shoots" generally refers to new fresh plant growth, including both stems and other structures like leaves or flowers. In most p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
