Body solitary or clustering, compressed spherical. Ribs 8-13, markedly tuberculate. Central spines 0-1, radial spines 6-10. Flowers white, yellow or pink and woolly tubed. [N. occulta (Phil.) Britton &Rose]

Chile

 

N. jussieui (Monville) Britton & Rose has 12-17 ribs with extremely prominent tubercles and relatively few more or less equal spines.

N. napina (Philippi) Backeb. is similar to N. odieri but has a sparsely bristly flower tube.

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.