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Rhodocactus
''Rhodocactus'' is a genus of flowering plant in the cactus family Cactaceae, native to central South America. Unlike most species of cacti, ''Rhodocactus'' has persistent leaves and a fully tree-like habit. The genus was sunk into a broadly circumscribed '' Pereskia'', but molecular phylogenetic studies from 2005 onwards showed that with this circumscription ''Pereskia'' was paraphyletic, and in 2016, ''Rhodocactus'' was restored for southern South American species. Description Like all cacti, ''Rhodocactus'' species have a succulent habit and specialized structures, areoles, that bear spines. They differ from most cacti in having persistent leaves. They grow as trees, tall. When mature, their stems develop bark, but its development is delayed, and all the species other than '' Rhodocactus nemorosus'' retain stomata. The areoles of ''Rhodocactus'' species can form "brachyblasts", called "spur shoots" by Beat Leuenberger. The areole initially forms in the axil of a leaf (s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodocactus Stenanthus
''Rhodocactus stenanthus'' is a species of cactus that is endemic to Brazil. First described as ''Pereskia stenantha'', it was transferred to ''Rhodocactus'' in 2016. Like all species in the genus ''Rhodocactus'', and unlike most cacti, it has persistent leaves. In its native locality, it is sometimes used in hedges. Description ''Rhodocactus stenanthus'' grows as a small tree or a shrub, usually reaching high, occasionally , with trunks to about in diameter in large specimens. The young twigs, thick, have variable numbers of stomata. Mature stems develop grayish-brown bark. Like all species of ''Rhodocactus'', and unlike most other cacti, ''R. stenanthus'' has persistent leaves, that are variable in shape and size. The very largest are up to long and wide, but more usually they are by . The fleshy leaves are often folded upwards along the midrib and have short petioles, long. The areoles bear leaves (brachyblast leaves) along with spines. The areoles on the twigs h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodocactus Grandifolius
''Rhodocactus grandifolius'' (rose cactus; syn. ''Pereskia grandifolia'') is a species of cactus native to eastern and southern Brazil. Like all species in the genus ''Rhodocactus'' and unlike most cacti, it has persistent leaves. It was first described in 1819. It is grown as an ornamental plant and has naturalized outside its native range. Description Although ''Rhodocactus grandifolius'' is a cactus by classification, it takes the form of a shrub or small tree, in height, exceptionally . Young twigs are green or reddish with conspicuous white spots marking the stomata. It has trunk has grayish-brown bark and has a diameter of up to . The areoles are rounded, cushion-shaped, and with grayish or brownish tomentum. On the twigs, they are across and up to on the main trunk. The areoles can have one to three or occasionally four leaves (brachyblast leaves) in addition to spines. The spines range from black to brown, the number at each areole gradually increasing with age; new ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pereskia Stenantha 02 SSZ
''Pereskia'' is a small genus of about four species of cacti that do not look much like other types of cacti, having substantial leaves and non-succulent stems. The genus is named after Nicolas-Claude Fabri de Peiresc, a 16th-century French botanist. The genus was more widely circumscribed until molecular phylogenetic studies showed that it was paraphyletic. The majority of species have since been transferred to ''Leuenbergeria'' and ''Rhodocactus''. Although ''Pereskia'' does not resemble other cacti in its overall morphology, close examination shows spines developing from areoles, and the distinctive floral cup of the cactus family. Description The four species of ''Pereskia'' as the genus is now circumscribed share many features in common with ''Leuenbergeria'' and ''Rhodocactus'', which were formerly included in a broadly defined ''Pereskia''. They are shrubs, trees or climbing vines, with maximum heights varying between 3 and 10 m. Unlike the great majority of species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodocactus Sacharosa
''Rhodocactus sacharosa'', synonym ''Pereskia sacharosa'', is a species of flowering plant in the cactus family Cactaceae, native from Bolivia and west-central Brazil to Paraguay and northern Argentina. Like all species in the genus ''Rhodocactus'' and unlike most cacti, it has persistent leaves. It was first described in 1879. Description ''Rhodocactus sacharosa'' grows as a small tree or a shrub, reaching high. Mature stems develop bark and, like most other species of ''Rhodocactus'', have stomata. Like all species of ''Rhodocactus'' and unlike most other cacti, ''R. sacharosa'' has persistent leaves. These are very variable in shape and size, long and wide, often folded along the midrib, which is very prominent on the underside, and with obvious petioles. The areoles on the twigs have up to five strong spines, long, those on the trunks may have up to 25 spines, long. The flowers are various shades of pink and are either solitary or borne in small terminal infloresce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pereskia Nemorosa, Phipps Conservatory, Pittsburgh
''Pereskia'' is a small genus of about four species of cacti that do not look much like other types of cacti, having substantial leaves and non-succulent stems. The genus is named after Nicolas-Claude Fabri de Peiresc, a 16th-century French botanist. The genus was more widely circumscribed until molecular phylogenetic studies showed that it was paraphyletic. The majority of species have since been transferred to ''Leuenbergeria'' and ''Rhodocactus''. Although ''Pereskia'' does not resemble other cacti in its overall morphology, close examination shows spines developing from areoles, and the distinctive floral cup of the cactus family. Description The four species of ''Pereskia'' as the genus is now circumscribed share many features in common with ''Leuenbergeria'' and ''Rhodocactus'', which were formerly included in a broadly defined ''Pereskia''. They are shrubs, trees or climbing vines, with maximum heights varying between 3 and 10 m. Unlike the great majority of species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pereskia Grandifolia 04764
''Pereskia'' is a small genus of about four species of cacti that do not look much like other types of cacti, having substantial leaves and non-succulent stems. The genus is named after Nicolas-Claude Fabri de Peiresc, a 16th-century French botanist. The genus was more widely circumscribed until molecular phylogenetic studies showed that it was paraphyletic. The majority of species have since been transferred to ''Leuenbergeria'' and ''Rhodocactus''. Although ''Pereskia'' does not resemble other cacti in its overall morphology, close examination shows spines developing from areoles, and the distinctive floral cup of the cactus family. Description The four species of ''Pereskia'' as the genus is now circumscribed share many features in common with ''Leuenbergeria'' and ''Rhodocactus'', which were formerly included in a broadly defined ''Pereskia''. They are shrubs, trees or climbing vines, with maximum heights varying between 3 and 10 m. Unlike the great majority of species o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodocactus Bahiensis
''Rhodocactus bahiensis'' is a species of tree-like cactus that is endemic to the Brazilian state of Bahia. First described as ''Pereskia bahiensis'', it was transferred to ''Rhodocactus'' in 2016. Like all species in the genus ''Rhodocactus'', and unlike most cacti, it has persistent leaves. In its native locality, it is used to form hedges. Description ''Rhodocactus bahiensis'' grows as a small tree or a shrub, reaching high, with trunks to in diameter. The young twigs are green or reddish, and have a few stomata, mainly around the areoles. Mature stems develop grayish-brown bark. Like all species of ''Rhodocactus'' and unlike most other cacti, ''R. bahiensis'' has persistent leaves, the largest being up to long and wide. The leaves are succulent and have very short petioles, only long. The areoles bear leaves (brachyblast leaves) along with spines. The areoles on the twigs have up to six spines, those on the trunks may have about 45, each or exceptionally long. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pereskia
''Pereskia'' is a small genus of about four species of cacti that do not look much like other types of cacti, having substantial leaves and non-succulent stems. The genus is named after Nicolas-Claude Fabri de Peiresc, a 16th-century French botanist. The genus was more widely circumscribed until molecular phylogenetic studies showed that it was paraphyletic. The majority of species have since been transferred to ''Leuenbergeria'' and ''Rhodocactus''. Although ''Pereskia'' does not resemble other cacti in its overall morphology, close examination shows spines developing from areoles, and the distinctive floral cup of the cactus family. Description The four species of ''Pereskia'' as the genus is now circumscribed share many features in common with ''Leuenbergeria'' and ''Rhodocactus'', which were formerly included in a broadly defined ''Pereskia''. They are shrubs, trees or climbing vines, with maximum heights varying between 3 and 10 m. Unlike the great majority of species ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pereskia Bahiensis Gürke
''Pereskia'' is a small genus of about four species of cacti that do not look much like other types of cacti, having substantial leaves and non- succulent stems. The genus is named after Nicolas-Claude Fabri de Peiresc, a 16th-century French botanist. The genus was more widely circumscribed until molecular phylogenetic studies showed that it was paraphyletic. The majority of species have since been transferred to '' Leuenbergeria'' and ''Rhodocactus''. Although ''Pereskia'' does not resemble other cacti in its overall morphology, close examination shows spines developing from areoles, and the distinctive floral cup of the cactus family. Description The four species of ''Pereskia'' as the genus is now circumscribed share many features in common with ''Leuenbergeria'' and ''Rhodocactus'', which were formerly included in a broadly defined ''Pereskia''. They are shrubs, trees or climbing vines, with maximum heights varying between 3 and 10 m. Unlike the great majority of sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodocactus Nemorosus
''Rhodocactus nemorosus'' is a species of flowering plant in the cactus family Cactaceae, native to southern Brazil, Paraguay, Uruguay and northeast Argentina. Like all species in the genus ''Rhodocactus'' and unlike most cacti, it has persistent leaves. It was first described by Nicolás Rojas Acosta in 1897 as ''Pereskia nemorosa'', and transferred to ''Rhodocactus'' in 2016. Description ''Rhodocactus nemorosus'' grows as a small tree or a shrub, reaching high, with trunks to in diameter. Mature stems develop bark and, unlike other species of ''Rhodocactus'', do not have stomata. Like all species of ''Rhodocactus'' and unlike most other cacti, ''R. nemorosus'' has persistent leaves, the largest being up to long and wide. The leaves are succulent and have short petioles, only long, and are borne on the areoles along with spines. The areoles on the twigs have up to five spines, those on the trunks up to 20 or more, each long. The white to pale pink flowers are eithe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cactus
A cactus (, or less commonly, cactus) is a member of the plant family Cactaceae, a family comprising about 127 genera with some 1750 known species of the order Caryophyllales. The word ''cactus'' derives, through Latin, from the Ancient Greek word (''káktos''), a name originally used by Theophrastus for a spiny plant whose identity is now not certain. Cacti occur in a wide range of shapes and sizes. Although some species live in quite humid environments, most cacti live in habitats subject to at least some drought. Many live in extremely dry environments, even being found in the Atacama Desert, one of the driest places on Earth. Because of this, cacti show many adaptations to conserve water. For example, almost all cacti are succulents, meaning they have thickened, fleshy parts adapted to store water. Unlike many other succulents, the stem is the only part of most cacti where this vital process takes place. Most species of cacti have lost true leaves, retaining only spines, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leuenbergeria
''Leuenbergeria '' is a genus of flowering plant in the family Cactaceae, mostly native around the Caribbean. Unlike most cacti, it has persistent leaves and develops bark on its stems early in its growth. The genus was created in 2012 by Joël Lodé. Before the creation of ''Leuenbergeria'' as a genus, the species within it were included in a broadly circumscribed genus, ''Pereskia''. ''Leuenbergeria'' is the only genus in the subfamily Leuenbergerioideae. Description Species of ''Leuenbergeria'' grow as trees or shrubs, up to in the case of '' L. lychnidiflora''. They differ from most cacti in having leaves even when mature – as also do species of ''Pereskia'' and ''Rhodocactus'', with which ''Leuenbergeria'' species were once united in a single genus. ''Leuenbergeria'' differs from those other genera in that the stems of ''Leuenbergeria'' species form bark at an early stage in their growth and do not have stomata, preventing them from acting as organs of photosynthes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
