Cleistocactus baumannii (Lem.) Lem.

Stems to 2 m or more long having 12-16 ribs. Areoles close-set with 15-20 spines to 4 cm long. Flowers curved upwards, orange or red.

Paraguay, Uruguay, NE Argentina


Other available species with mostly 7-14 spines include C. morawetzianus Backeb. from C Peru which has white flowers and C. smaragdiflorus (F.A.C. Weber) Britton & Rose from N Argentina which has characteristic green-tipped red flowers.

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
genus        Cleistocactus Lem.