Eremothamnus | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Asterales |
Family: | Asteraceae |
Subfamily: | Cichorioideae |
Genus: | Eremothamnus O.Hoffm. |
Species: | E. marlothianus |
Binomial name | |
Eremothamnus marlothianus | |
Eremothamnus is a monotypic genus of shrubs in the family Asteraceae. Its only species is Eremothamnus marlothianus. [2] It is native to the coastal desert of Namibia. [3] It is a small shrub with spiny leaves.
The genus Eremothamnus was erected in 1889 by Otto Hoffmann, when he named its only species, Eremothamnus marlothianus. [4] The specific epithet is for Rudolf Marloth (1855–1931), a South African botanist, pharmacist, and analytical chemist. The generic name is derived from the Greek words eremos and thamnos. Hoffmann did not give an etymology for the name and it has been supposed that it means "solitary shrub", [5] but "desert shrub" is also a possible interpretation.
Eremothamnus is closely related to Hoplophyllum . [6] [7] These two genera form a clade in the subfamily Cichorioideae. [8] [9] Some authors have placed Eremothamnus in the tribe Arctotideae. [2] [10] In some of the more recent classification systems, Eremothamnus and Hoplophyllum constitute the tribe Eremothamneae. [11]
Asteraceae is a large family of flowering plants that consists of over 32,000 known species in over 1,900 genera within the order Asterales. The number of species in Asteraceae is rivaled only by the Orchidaceae, and which is the larger family is unclear as the quantity of extant species in each family is unknown. The Asteraceae were first described in the year 1740 and given the original name Compositae. The family is commonly known as the aster, daisy, composite, or sunflower family.
Eupatorieae is a tribe of over 2000 species of plants in the family Asteraceae. Most of the species are native to tropical, subtropical, and warm temperate areas of the Americas, but some are found elsewhere. Well-known members are Stevia rebaudiana, a number of medicinal plants (Eupatorium), and a variety of late summer to autumn blooming garden flowers, including Ageratum (flossflower), Conoclinium (mistflower), and Liatris.
Gazania is a genus of flowering plants in the family Asteraceae, native to Southern Africa.
Distephanus is a genus of flowering plants in the family Asteraceae. It is described by American botanist Harold E. Robinson as having over 40 species and by David Mabberley as having only 34 species. These sources differ sharply in their description of the range of the genus. Robinson has it ranging throughout Africa and occurring also in India and China. Mabberley has it restricted to southeast Africa, Madagascar, and Mauritius. Plants of the World Online accepts 44 species native to sub-Saharan Africa, Madagascar, and south-central China.
The Gochnatioideae are a subfamily of the aster family, Asteraceae. It contains the single tribe Gochnatieae of six genera, with a total of about 80 to 90 species. They are native to the Americas from the southern United States to Argentina, including the Caribbean, and Cuba in particular.
Carduoideae is the thistle subfamily of the Asteraceae, or sunflower family, of flowering plants. It comprises a number of tribes in various circumscriptions of the family, in addition to the Cardueae.
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.
Anthemideae is a tribe of flowering plants in the subfamily Asteroideae, which is part of the family Asteraceae. They are distributed worldwide, with concentrations in central Asia, the Mediterranean Basin, and southern Africa. Most species of plant known as chamomile belong to genera of this tribe.
Liabeae is a tribe in the plant family Asteraceae. It is endemic to the Neotropics, where it is most diverse in the northern and central Andes. The center of diversity is in Peru.
Didelta is a genus of shrubs of up to 1 or 2 meter high, with two known species in the daisy family. Like in almost all Asteraceae, the individual flowers are 5-merous, small and clustered in typical heads, and are surrounded by an involucre, consisting of in this case two whorls of bracts, which are almost free from each other. The 3–5 outer bracts are protruding and triangular in shape, the inner about twice as many are lance-shaped and ascending. In Didelta, the centre of the head is taken by 3–5 clusters of bisexual yolk yellow disc florets, sometimes divided from each other by male disc florets, and is surrounded by one complete whorl of infertile yolk yellow ray florets. The common base of the flowerhead swells around the developing fruitlets, become woody and breaks into segments when ripe. The fruitlets germinate within this woody encasing. The species of the genus Didelta can be found in Namibia and South Africa. The genus is called salad thistle in English and slaaibos in Afrikaans.
Gymnarrhena is a deviant genus of plants in the family Asteraceae, with only one known species, Gymnarrhena micrantha. It is native to North Africa and the Middle East, as far east as Balochistan. Together with the very different Cavea tanguensis it constitutes the tribe Gymnarrheneae, and in the subfamily Gymnarrhenoideae.
Heterolepis is a genus of flowering plants in the sunflower family. It has three or four species, all endemic to the Western Cape Province in South Africa.
Hoplophyllum is a genus of flowering plants in the family Asteraceae. It has two species, Hoplophyllum spinosum and Hoplophyllum ferox, both native to South Africa.
Platycarpha is a genus of South African plants within the family Asteraceae.
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 1 cm (0.4 in) 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).
Cavea is a low perennial herbaceous plant that is assigned to the family Asteraceae. Cavea tanguensis is currently the only species assigned to this genus. It has a basal rosette of entire, slightly leathery leaves, and stems of 5–25 cm high, topped by bowl-shaped flower heads with many slender florets with long pappus and purplish corollas. The vernacular name in Chinese is 葶菊. It grows high in the mountains of China (Sichuan), Tibet, India (Sikkim), and Bhutan, and flowers in July and August.
Cymbonotus lawsonianus, commonly known as bears ear, is a species of small shrub in the family Asteraceae from southeastern Australia. It has been described as Arctotis lawsoniana. It is one of three species in the small genus Cymbonotus. It was named in honour of the explorer William Lawson.
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.
Ambrosiinae is a subtribe of flowering plants in the tribe Heliantheae, and is endemic to the Americas.
Vernonioideae is a subfamily of the sunflower family, Asteraceae. It includes seven or more tribes, some of which contain subtribes.