Etymology: Named in honour of Werner Übelmann, a Swiss citizen
that worked to discover new cactus species.
are usually solitary, or form clusters with
age. Stems are flattened, globose, often pulling into the ground, glaucous
grey-green, up to 1 cm high and 7 cm in diameter. With 8-12 ribs, forming
distinct tubercles with chin-like protrusions and grooves between the
Spines: Spine clusters have a characteristic spider-like
shape, Spines (all radials): 5-7, chalky white, flexible, somewhat curved
and often twisted, one pointing downward, 0.5-1.5 cm long.
Flowers: cream-white, with a darker pinkish-red throat,
up to 3.5 cm in length and in diameter.
Fruits: broadly globose, green, up to 6 mm in diameter.