Description: Tiny solitary cactus.
Stem: Flattened globose, pale grey-green, olive green or
purplish-tan in full sun, 2 cm tall, 3.5-5 cm in diameter.
Root: tap root
Tubercles: Broad, flattened, 4-angled.
Areoles: White and woolly.
Spines: 1 to 3 spongy spines, one up to 2 cm
Flowers: White in summer (July to September in habitat), 2.5 cm
long, 4 cm across, white or pinkish stigmas.
Cultivation: It’s a fairly
easy species to cultivate. It needs a very well-drained soil, and
requires strong sun to part sun to keep the plant compact
and low and to develop a good spinal growth. Waterings should be
rather infrequent to keep the plant compact, and avoid its becoming
excessively elongated and unnatural in appearance.
Furthermore it has a tap root, and watering it properly is often
difficult, because it tends to crack open or rot if over-watered.
Keep dry in winter, or when night temperatures remain below 10° C. It
is hardy to -4°C for a short period. Assure a good ventilation.
Reproduction: From seed, since the plant rarely produces