Commemorating Francis L. Stetson from New York (early 20th century).
Body tree-like, to 10 m tall with many erect cylindrical branches. Ribs 8-9. Spines 7-9. Flowers nocturnal, funnel-shaped with an internal ring of hairs formed from modified stamens, white. Pericarpel and especially flower tube elongated with numerous overlapping pointed scales. Fruit oblong to spherical, to 6 cm long, red or green with many small scales.
The sole species is the white-flowered S. coryne (Salm-Dyck) Britton & Rose which makes a fine pot specimen mostly 10 cm to 30 cm tall, rarely encountered growing towards its potential natural height.
Tall, columnar stems; flowers with an internal ring of hairs.
1 species from NW Argentina, Paraguay and S Bolivia.
Source: (1997). Cactaceae. In: . 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.
