Species of cactus
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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. The pink to reddish-purple flowers are either solitary or borne in small terminal inflorescences of 2–12, and are across. The fruits are more-or-less pear-shaped, long, containing many glossy black seeds.
In its native habitat, "R. bahiensis" flowers in the spring and summer, from October to April, and fruits in the autumn from March to June. It then loses its leaves in the winter dry season from about June to October.
Taxonomy.
The species was first described by R. L. M. Gürke in 1897 as "Pereskia bahiensis". Molecular phylogenetic studies suggested that when broadly circumscribed, "Pereskia" was not monophyletic, and consisted of three clades. In 2016, the genus "Rhodocactus" was revived for one of these clades, which included "R. bahiensis".
Distribution and habitat.
"Rhodocactus bahiensis" is endemic to the Brazilian state of Bahia, where it is found in "caatinga", subtropical dry shrubland.
Conservation.
"Rhodocactus bahiensis" has been assessed as Least Concern, with no major threats. It regenerates well after disturbance.
Uses.
"Rhodocactus bahiensis" is used locally for hedges. Cuttings are planted densely to form an impenetrable hedge, which is cut regularly.
References.
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