Larryleachia cactiformis

Trichocaulon cactiforme
Scientific classification
Kingdom:	Plantae
Order:	Gentianales
Family:	Apocynaceae
Subfamily:	Asclepiadoideae
Genus:	Trichocaulon
Species:	T. cactiforme
Binomial name
Trichocaulon cactiforme

Native to rocky crevices in Namaqualandu in South Africa, Trichocaulon cactiforme proves as difficult a member of the Apocynaceae family in cultivation as others in its genus.

Description

True its name, cactiforme grows in the shape of a small cactus, whith no leaves, spines or branches but ribbed with mammaillae on 4-6 sided protrusions. It is greyish green in colour and starts spherical, then grows into a short cylindrical stem of 4-6 inches high, and sometimes taller in captivity. The flowers grow from 0.2-0.6 inch penduncles from the top, and are 1 inch in diameter when open. The corolla is pale yellow, fleshy, five pointed, shrivelled on the inside and decorated with dark red spots and lighter red tips. Seeds are flat and brown.

Cultivation

The usual problems for cultivation of Trichocaulons apply to cactiforme, primary of these being the need for year- round warmth and sunlight, and the dangers of root rot and mealy bugs. Grafting T. cactiforme onto a rootstock tuber of a Ceropegia, such as C. woodii, and treating the plants against root mealy bugs should mostly alleviate these issues, though propagation is still a problem as the plant does not offset or seed readily and grows difficultly and slowly from seedling.

References

• The Complete Encyclopedia of Succulents by Zdenek Jezek and Libor Kunte