Cleistocactus Lem.

Torch Cactus

Greek kleistos—closed, referring to the unexpanded flower.

Body mostly shrubby, erect, prostrate or pendulous, narrowly cylindric. Ribs 5-30, low. Areoles with and without flowers mostly the same. Flowers narrow, tubular, red, orange, yellow or green; stamens in 2 groups, the lower one on a rim over the nectar chamber. Flower tube straight, bent or s-shaped and, together with the pericarpel, covered with scales that are woolly or hairy in the axils. Fruit small, spherical, fleshy, sometimes with hairs and usually with perianth remnants persistent. [Borzicactus Riccob.]

Narrow tubular 'closed' flowers (adapted to pollination from humming-birds) with stamens in 2 groups; fruit spherical, 1-4 cm wide.

40-50 species from C Peru to Bolivia, N Argentina, Paraguay, Uruguay.

Source: Thompson, A, ; Forbes, S.; Spencer, R. (1997). Cactaceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Caryophyllanae
order      Caryophyllales
family       Cactaceae
Higher taxa
Subordinate taxa