Stapeliinae | |
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Stapelia gigantea | |
Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Eudicots |
Clade: | Asterids |
Order: | Gentianales |
Family: | Apocynaceae |
Subfamily: | Asclepiadoideae |
Tribe: | Ceropegieae |
Subtribe: | Stapeliinae G. Don [1] |
Genera | |
See text. |
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. [2] Historically, a similarly circumscribed taxon was treated as a separate tribe, Stapelieae.
This section includes a list of general references, but it lacks sufficient corresponding inline citations .(December 2023) |
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 over 2 m/6" tall. The leaves are in most species reduced to rudiments, sometimes hardened and thorn-like, arranged on bumps or tubercles on the angles. Some species, however, still have recognisable leaves, most notably the Indian species Boucerosia frerei (syn. Frerea indica), and some members of Tridentea . Stapeliads are most abundant in warm, dry climates. In Africa, there are two separate regions where stapeliads have most diversified: northeast Africa, and Southern Africa. Several species are endemic to the small island of Socotra off the Horn of Africa. The Arabian Peninsula, and most specifically the country of Yemen, contain another concentration of species. Several more are found in the drier parts of Pakistan, Afghanistan, India, Nepal, and Myanmar. A single species, Apteranthes europaea (syn. Caralluma europaea) is found in Europe, in the very southern part of the Iberian peninsula and in the island of Lampedusa. Stapeliads are often regarded as a climax group within the family because of their often structurally complex flowers. Certain aspects of these reproductive parts mirror the pollination systems in the orchid family and represent a case of parallel evolution though both groups are quite unrelated and have developed similar, though not identical means to achieve the ultimate goal of pollination and therefore reproduction. Most stapeliads use flies as pollinators, that are attracted to odours resembling dung or rotting meat, emanating from the flowers. Many of the flowers also bear some physical resemblance to rotting animal carcasses, leading to their popular name of "carrion flowers". However, not all stapeliads smell bad, or attract flies. Some species use beetles, bees, wasps, butterflies or moths as pollinators. Stapeliad flowers range in size from mere millimetres in species of Echidnopsis and Pseudolithos to those of Stapelia gigantea that can reach 40 cm/16" in diameter, and are some the largest of flowers to be found on any species of succulent.
Flowers are actinomorphic (radially symmetrical) with 5 free or fused sepals and petals. Some petals are formed in a shape of a star while some have a tubular shaped corolla. On some species, a raised ring or annulus is present in the center of the corolla. Instead of stamens and pistils, stapeliads contain a pollinarium. [3] [4]
The first use of the subtribe (using the name Stapelieae) was by George Don in 1838. [5] [6] Don's taxon included both Ceropegia and Stapelia . [6] Later workers, such as George Bentham, used these genera as the basis of two separate tribes, Ceropegieae and Stapeliae. The two tribes were formally reunited in 1991 as the tribe Ceropegieae. [7] In 2004, Ulrich Meve and Sigrid Liede reintroduced the subtribe as a division of the tribe Ceropegieae, supported by molecular phylogenetic studies. [8] Subsequent studies, including one in 2017, have confirmed the division of the tribe Ceropegieae into four subtribes, of which Stapeliinae is the most derived: [2]
Ceropegieae |
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In 2014, Endress, Liede-Schumann and Meve placed the following genera in subtribe Stapeliinae. [1] As of December 2023 [update] , some are treated as synonyms by Plants of the World Online.
Apocynaceae 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. Members of the family are native to the European, Asian, African, Australian, and American tropics or subtropics, with some temperate members. The former family Asclepiadaceae is considered a subfamily of Apocynaceae and contains 348 genera. A list of Apocynaceae genera may be found here.
The Asclepiadoideae are a subfamily of plants in the family Apocynaceae. Formerly, they were treated as a separate family under the name Asclepiadaceae, e.g. by APG II, and known as the milkweed family.
Ceropegia is a genus of plants within the family Apocynaceae, native to Africa, southern Asia, and Australia. It was named by Carl Linnaeus, who first described this genus in his Genera plantarum, which appeared in 1737. Linnaeus referred to the description and picture of a plant in the Horti Malabarici as the plant for which the genus was created. In 1753 he named this species as Ceropegia candelabrum. Linnaeus did not explain the etymology but later explanations stated that the name Ceropegia was from the Greek word keropegion κηροπηγɩον. This means candelabrum in Latin, which has a broader range than the modern word - "a candlestick, a branched candlestick, a chandelier, candelabrum, or also lamp-stand, light-stand, sometimes of exquisite workmanship".
Stapelia is a genus of low-growing, spineless, stem succulent plants, predominantly from South Africa with a few from other parts of Africa. Several Asian and Latin American species were formerly included but they have all now been transferred to other genera. The flowers of certain species, most notably Stapelia gigantea, can reach 41 cm (16 inches) in diameter when fully open. Most Stapelia flowers are visibly hairy and generate the odor of rotten flesh when they bloom.
The genus Huernia consists of perennial, stem succulents from Eastern and Southern Africa and Arabia, first described as a genus in 1810.
Carrion flowers, also known as corpse flowers or stinking flowers, are mimetic flowers that emit an odor that smells like rotting flesh. Apart from the scent, carrion flowers often display additional characteristics that contribute to the mimesis of a decaying corpse. These include their specific coloration, the presence of setae and orifice-like flower architecture. Carrion flowers attract mostly scavenging flies and beetles as pollinators. Some species may trap the insects temporarily to ensure the gathering and transfer of pollen.
Duvalia is a succulent plant genus in the subfamily Asclepiadoideae, in the family Apocynaceae (dogbane).
Larryleachia is a genus of stapeliad succulent flowering plants in the family Apocynaceae.
Stapelianthus is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1933. The entire genus is endemic to Madagascar and is concentrated in the far south of the island.
Pseudolithos is a genus of succulent flowering plants of the family Apocynaceae, indigenous to arid areas of Somalia, Yemen and Oman.
Tavaresia is a genus of plants in the family Apocynaceae, first described as a genus in 1902. It is native to southern Africa.
Stapeliopsis is a genus of succulent plants in the family Apocynaceae, native to southern Africa.
Echidnopsis is a genus of succulent, cactus-like plants in the family Apocynaceae, first described as a genus in 1871. They are native to eastern Africa and the Arabian Peninsula.
Piaranthus is a succulent plant genus in the subfamily Asclepiadoideae, in the family Apocynaceae.
Orbea is a genus of flowering plants of the family Apocynaceae, first described as a genus in 1812. It is native to Africa and the Arabian Peninsula.
Peter René Oscar Bally was a Swiss botanical illustrator, botanist and taxonomist. The standard author abbreviation P.R.O.Bally is used to indicate this person as the author when citing a botanical name.
Ceropegia ampliata is a flowering plant in the dogbane family Apocynaceae, native to eastern and southern Africa, including Kenya, Tanzania, Mozambique, South Africa, Eswatini, Botswana, and Madagascar. Common names include bushman's pipe, condom plant, and horny wonder.