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Asclepiadoideae
The Asclepiadoideae are a subfamily of plants in the family Apocynaceae. Formerly, it was treated as a separate family under the name Asclepiadaceae, e.g. by APG II, and known as the milkweed family. They form a group of perennial herbs, twining shrubs, lianas or rarely trees but notably also contain a significant number of leafless stem succulents. The name comes from the type genus '' Asclepias'' (milkweeds). There are 348 genera, with about 2,900 species. They are mainly located in the tropics to subtropics, especially in Africa and South America. The florally-advanced tribe Stapelieae within this family contains several relatively familiar stem succulent genera, such as '' Orbea'', '' Huernia, Stapelia'' and '' Hoodia''. They are remarkable for the complex mechanisms which they have developed for pollination, independently parallel to the unrelated Orchidaceae, such as the grouping of their pollen into pollinia. The "fragrance" (or odor) of the flowers, often called "c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stapelieae
Stapeliinae is a subtribe of flowering plants within the tribe Ceropegieae of the subfamily Asclepiadoideae of the family Apocynaceae. The subtribe comprises about 35 genera, including both the stem-succulent "stapeliads" and the horticulturally popular genera '' Brachystelma'' and '' Ceropegia''. The largest number of genera are native to Africa, but a more limited number of genera are widespread in Arabia and Asia. Historically, a similarly circumscribed taxon was treated as a separate tribe, Stapelieae. Description Most of the genera of plants within the subtribe Stapeliinae are to varying degrees stem succulents, often referred to as "stapeliads". Many of these resemble cacti, though are not closely related, as an example of convergent evolution. The stems are often angular, mostly four-angled in cross-section, but in some species there are six or more, with some species of '' Hoodia'' having more than thirty angles. In size they vary from less than 2.5 cm/1" in length to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apocynaceae
Apocynaceae (, from '' Apocynum'', Greek for "dog-away") is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison. Notable members of the family include oleander, dogbanes, milkweeds, and periwinkles. The family is native to the European, Asian, African, Australian, and American tropics or subtropics, with some temperate members as well. The former family Asclepiadaceae (now known as Asclepiadoideae) is considered a subfamily of Apocynaceae and contains 348 genera. A list of Apocynaceae genera may be found here. Many species are tall trees found in tropical forests, but some grow in tropical dry ( xeric) environments. Also perennial herbs from temperate zones occur. Many of these plants have milky latex, and many species are poisonous if ingested, the family being rich in genera containing alkaloids and cardiac glycosides, those containing the latter oft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pollinia
A pollinium (: pollinia) is a coherent mass of pollen grains in a plant that are the product of only one anther, but are transferred, during pollination, as a single unit. This is regularly seen in plants such as orchids and many species of milkweeds (Asclepiadoideae). Usage of the term differs: in some orchids two masses of pollen are well attached to one another, but in other orchids there are two halves (with two separate viscidia) each of which is sometimes referred to as a pollinium. Most orchids have waxy pollinia. These are connected to one or two elongate stipes, which in turn are attached to a sticky viscidium, a disc-shaped structure that sticks to a visiting insect. Some orchid genera have mealy pollinia. These are tapering into a caudicle (stalk), attached to the viscidium. They extend into the middle section of the column. The pollinarium is a collective term that means either (1) the complete set of pollinia from all the anthers of a flower, as in Asclepiadoideae, ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Huernia
The genus ''Huernia'' (family Apocynaceae, subfamily Asclepiadoideae) consists of perennial, stem succulents from Eastern and Southern Africa and Arabia, first described as a genus in 1810.Brown, Robert. 1810. On the Asclepiadeae 11 The flowers are five-lobed, usually somewhat more funnel- or bell-shaped than in the closely related genus ''Stapelia'', and often striped vividly in contrasting colors or tones, some glossy, others matte and wrinkled depending on the species concerned. Frequently the flowers are colored a variation of red, yellow or brown. To pollinate, the flowers attract flies by emitting a scent similar to that of carrion. The genus is considered close to the genera ''Stapelia'' and '' Hoodia''. Phylogenetic studies have shown the genus to be monophyletic, and most closely related to the genus '' Tavaresia'', and to a widespread branch of stapeliads comprising the genera '' Orbea'', ''Piaranthus'' and ''Stapelia''.P. Bruyns, C. Klak, P. Hanacek: ''Evolution of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoodia
''Hoodia'' (; known locally as "ghaap" or "bobbejaanghaap") is a genus of flowering plants in the family Apocynaceae, under the subfamily Asclepiadoideae, native to Southern Africa. One species of ''Hoodia'' in particular, '' Hoodia gordonii'', has achieved a degree of fame and controversy, after being investigated for use as a possible appetite suppressant. Description The group was first described as a genus in 1844. Hoodia are stem succulents, described as "cactiform" because of their remarkable similarity to the unrelated cactus family. They have a branching, shrub-like form, and the largest species ('' Hoodia parviflora'') can grow to the size of a tree — over in height. The flowers are extremely variable in size — from less than 1 cm, to almost 20 cm in diameter, depending on the species. Flowers appear in large numbers, always near the tops of the stems. Those of larger-flowered species (such as '' Hoodia gordonii'') are often a papery pink-tan colour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microloma Calycinum PICT2490
''Microloma'' is a small genus of ''Ceropegia''-like twiners and twiggy bushes occurring in mainly arid or fynbos regions in South Africa. They are generally undistinguished when not in bloom, but the flowers of most species are incongruously decorative. Overview ''Microloma'' Robert Brown (botanist, born 1773), R. Br. in Mem. Werner. Soc.1: 53, (1809), is a genus of herbaceous perennial plant, perennial, dicotyledonous plants. ''Microloma'' species were originally described as members of the genus Ceropegia, in the family (biology), family Asclepiadaceae, but Robert Brown (botanist, born 1773), Brown separated them and created a new genus, still in the family Asclepiadaceae. More recently the Asclepiadaceae have been reclassified as the Family (biology), subfamily Asclepiadoideae of the dogbane family Apocynaceae. Common names of ''Microloma'' species are various and regional; Manning mentions "wax creeper" and "melktou" (literally "milk-string", a curious name because the pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Succulent Plant
In botany, succulent plants, also known as succulents, are plants with parts that are thickened, fleshy, and engorged, usually to retain water in arid climates or soil conditions. The word ''succulent'' comes from the Latin word ''sucus'', meaning "juice" or "sap". Succulents may store water in various structures, such as leaf, leaves and Plant stem, stems. The water content of some succulent organs can get up to 90–95%, such as ''Glottiphyllum semicyllindricum'' and ''Mesembryanthemum barkleyii''. Some definitions also include roots, thus geophytes that survive unfavorable periods by dying back to underground storage organs (caudex) may be regarded as succulents. The habitats of these water-preserving plants are often in areas with high temperatures and low rainfall, such as deserts, but succulents may be found even in Alpine climate, alpine ecosystems growing in rocky or sandy soil. Succulents are characterized by their ability to thrive on limited water sources, such as mist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asclepias
''Asclepias'' is a genus of herbaceous, perennial, flowering plants known as milkweeds, named for their latex, a milky substance containing cardiac glycosides termed cardenolides, exuded where cells are damaged. Most species are toxic to humans and many other species, primarily due to the presence of cardenolides. However, as with many such plants, some species feed upon milkweed leaves or the nectar from their flowers. A noteworthy feeder on milkweeds is the monarch butterfly, which uses and requires certain milkweeds as host plants for its larvae. The ''Asclepias'' genus contains over 200 species distributed broadly across Africa, North America, and South America. It previously belonged to the family Asclepiadaceae, which is now classified as the subfamily Asclepiadoideae of the dogbane family, Apocynaceae. The genus was formally described by Carl Linnaeus in 1753, who named it after Asclepius, the Greek god of healing. Flowers Members of the genus produce some of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orbea (plant)
''Orbea'' is a genus of flowering plants of the family Apocynaceae, first described as a genus in 1812. It is native to AfricaLeach, Leslie Charles. 1975. Kirkia 10(1): 289-291. and the Arabian Peninsula. ;Species Species accepted by the Plants of the World Online as of February 2023: References {{Taxonbar, from=Q162376 Apocynaceae genera Asclepiadoideae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aspidoglossum
''Aspidoglossum'' is a genus of plants in the family Apocynaceae, first described as a genus in 1838. It is native to Africa Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ....Gibbs Russell, G. E., W. G. M. Welman, E. Retief, K. L. Immelman, G. Germishuizen, B. J. Pienaar, M. Van Wyk & A. Nicholas. 1987. List of species of southern African plants. Memoirs of the Botanical Survey of South Africa 2(1–2): 1–152(pt. 1), 1–270(pt. 2). ;Accepted species References {{Taxonbar, from=Q5709469 Apocynaceae genera Asclepiadoideae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Araujia
''Araujia'' is a small genus of perennial vines in the Apocynaceae, dogbane family first described as a genus in 1817. The group is native to South America. Species The following species are recognised in the genus ''Araujia'': *''Araujia angustifolia'' - Brazil, Paraguay, Uruguay, NE Argentina *''Araujia brachystephana'' *''Araujia hassleriana'' *''Araujia herzogii'' - Bolivia *''Araujia megapotamica'' - Brazil, Uruguay, NE Argentina *''Araujia odorata'' *''Araujia plumosa'' - Brazil, Paraguay, Bolivia, NW Argentina *''Araujia scalae'' *''Araujia sericifera'' - white bladderflower, cruel vine - Peru, Brazil; naturalized in parts of South Africa + United States *''Araujia stormiana'' *''Araujia stuckertiana'' - Cordoba in Argentina *''Araujia subhastata'' - Brazil *''Araujia variegata'' References External links Jepson Manual Treatment [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Molecular Phylogenetics
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 phylogenetics, 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 (biology), 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 tre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
