Dorotheantheae | |
---|---|
Cleretum bellidiforme | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Order: | Caryophyllales |
Family: | Aizoaceae |
Subfamily: | Ruschioideae |
Tribe: | Dorotheantheae |
Type genus | |
Dorotheanthus | |
Genera | |
CleretumN.E.Br. |
Dorotheantheae is a small tribe of annual succulents in the Aizoaceae subfamily Ruschioideae. Though it originally comprised three genera (Aethephyllum, Cleretum , and Dorotheanthus),Cleretum remains as the only recognised genus. Dorotheantheae are endemic to the western and south-western parts of South Africa. The type genus is Dorotheanthus, [1] despite it being no longer recognised.
Species in the Dorotheantheae tribe are endemic to the south and southwest areas of South Africa, specifically the Cape Floristic Region and Succulent Karoo Region, [2] or "Greater Cape Flora", [3] an area that sees great diversity in its flora, though, remains distinct. [4] In turn, this means the location of individual species can range from as north as Namaqualand to as east as Plettenberg Bay. The species most commonly appear in flat and open areas, occasionally with the land consisting of loam or sand. [2]
All species are annual succulent herbs. The difference in appearance between each of the tribe's four formerly recognised clades is usually minor. The leaf shape is spathulate, with the exception of those that were members of the Aethephyllum clade, with those having lyrate leaves. All species have visible bladder cells, typically described as "moderately raised". [2] The pedicel is either long or short and there is distinct variation between clades for the vibrancy and colouration of the flower and its conspicuousness. Additionally, the diameter of the flower ranges from large to small. [2]
All species have papillate seed surfaces, besides those that were in the Dorotheanthus subg. Dorotheanthus clade. [2]
There is only one recognised genus in the Dorotheantheae tribe, per Plants of the World Online: [5]
Previously, another two genera were recognised as being members of this tribe: [6]
In a molecular study completed by Cornelia Klak and Peter V. Bruyns in 2012 and published in the scientific journal Taxon , titled "Phylogeny of the Dorotheantheae (Aizoaceae), a tribe of succulent annuals", it was found that Dorotheantheae consisted of four clades: [2] [7] the aforementioned three modified to have Dorotheanthus split in two, introducing D. subg. Dorotheanthus and D. subg. Pherolobus . [2] Additionally, it was proved that the genus Cleretum was not monophyletic, as circumscribed in 1987, and hence some species were better suited under the genus Aethephyllum. Following this, it was argued that "fruit morphology" was unreliable for discerning genera in the family Aizoaceae; the most common manner was to consider combinations of homoplasious characteristics. [2] This method was considered by Klak and Bruyns to be "not necessarily justified", with it being the only differentiating factor between the Cleretum and Dorotheanthus clades. [2] Hence, despite there being aspects allowing for the recognition of Dorotheanthus and Aethephyllum, though they "remain[ed] difficult to distinguish", the conclusions of the study were that while the tribe is adequately characterised, the factors differentiating each genus are indistinct or negligible and should be reduced to only Cleretum due to that species' loose circumscription. [2]
Prior to the study, the genera Cleretum and Dorotheanthus were often confused, as noted in the "Aizoaceae A-E" edition of Heidrun Hartmann's 2001 book "Illustrated Handbook of Succulent Plants". [8]
The Crassulaceae, also known as the stonecrop family or the orpine family, are a diverse family of dicotyledon flowering plants characterized by succulent leaves and a unique form of photosynthesis, known as Crassulacean acid metabolism (CAM). Flowers generally have five floral parts. Crassulaceae are usually herbaceous but there are some subshrubs, and relatively few treelike or aquatic plants. Crassulaceae are a medium size monophyletic family in the core eudicots, among the order Saxifragales, whose diversity has made infrafamilial classification very difficult. The family includes approximately 1,400 species and 34–35 genera, depending on the circumscription of the genus Sedum, and distributed over three subfamilies. Members of the Crassulaceae are found worldwide, but mostly in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce, although a few are aquatic.
The Aizoaceae, or fig-marigold family, is a large family of dicotyledonous flowering plants containing 135 genera and about 1800 species. They are commonly known as ice plants or carpet weeds. They are often called vygies in South Africa and New Zealand. Highly succulent species that resemble stones are sometimes called mesembs.
Mesembryanthemum is a genus of flowering plants in the family Aizoaceae; like many members of this family, it is characterized by long-lasting flower heads. Flowers of Mesembryanthemum protect their gametes from night-time dews or frosts but open in sunlight. There is an obvious evolutionary advantage to doing this; where sun, dew, frost, wind or predators are likely to damage exposed reproductive organs, closing may be advantageous during times when flowers are unlikely to attract pollinators. It is indigenous to southern Africa.
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".
Glottiphyllum is a genus of about 57 species of succulent subtropical plants of the family Aizoaceae. It is closely related to the Gibbaeum and Faucaria genera. The name comes from ancient Greek γλωττίς glottis "tongue" and φύλλον phyllon "leaf". The species are native to South Africa, specifically to Cape Province and the Karoo desert. They grow in rocks and soils incorporating slate, sandstone and quartz. Rainfall in their native areas is between 125 and 500 mm, most of which falls in March and November.
Cylindrophyllum comptonii is a species of succulent plant belonging to the genus Cylindrophyllum of the family Aizoaceae. It is endemic to South Africa.
Cleretum bellidiforme, commonly called Livingstone daisy, Bokbaaivygie (Afrikaans), or Buck Bay vygie, is a species of flowering plant in the family Aizoaceae, native to the Cape Peninsula in South Africa. It is a low-growing succulent annual growing to 25 cm (10 in), and cultivated for its iridescent, many-petalled, daisy-like blooms in shades of white, yellow, orange, cream, pink and crimson. In temperate areas it is popularly grown as a half-hardy annual, and lends itself to mass plantings or as edging plants in summer bedding schemes in parks and gardens. It is still widely referenced under its former names, Mesembryanthemum criniflorum and Dorotheanthus bellidiformis.
Glottiphyllum cruciatum is a rare species of succulent plant, of the family Aizoaceae. It is indigenous to arid areas near Oudtshoorn in the Western Cape, South Africa. The plant has many synonyms including Glottiphyllum angustum.
Piaranthus is a succulent plant genus in the subfamily Asclepiadoideae, in the family Apocynaceae.
Euphorbia flanaganii, commonly known as Transkei medusa's head, is a succulent plant that belongs to the family Euphorbiaceae. Due to the breadth of the Euphorbiaceae, little research specific to E. flanaganii has been conducted.
Glottiphyllum regium is a rare species of succulent plant, in the family Aizoaceae. It is known locally as "koeispene". It is restricted to a small arid area near Calitzdorp in the Western Cape, South Africa.
Glottiphyllum linguiforme is a widespread species of succulent plant, of the family Aizoaceae, native to South Africa. It is the type species of the genus Glottiphyllum.
Cleretum is a genus of flowering plants in the family Aizoaceae, native to the Cape Provinces of South Africa.
Trichodiadema marlothii is succulent plant of the genus Trichodiadema, native to the Western Cape Province, South Africa, where it is known from the Robertson and Swellendam areas.
Trichodiadema intonsum is succulent plant of the genus Trichodiadema, native to the Eastern Cape Province, South Africa.
Trichodiadema mirabile is succulent plant of the genus Trichodiadema, native to the Western Cape Province, South Africa, where it is known from the Laingsburg area and especially from south-facing slopes.
Trichodiadema densum is a succulent flowering plant in the fig-marigold family Aizoaceae, native to the Willowmore region of the Western Cape Province, South Africa.
Neohenricia is a genus of flowering plants in the family Aizoaceae, native to South Africa. Low-lying succulents, they are found in places that can collect a little water, such as crevices and pans, on sandstone or dolorite, in areas that get at least 200 mm of rainfall annually.
Trichodiadema barbatum is succulent plant of the genus Trichodiadema, native to the Eastern Cape Province, South Africa.
Stayneria is a genus of flowering plants belonging to the family Aizoaceae. It contains a single species, Stayneria neilii. It is in the subfamily Ruschioideae and the tribe Ruschieae.
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