Always grows solitarily. It is a variable
low growing species especially for spination. (Some plants have minimal
spination while others seem quite heavily armed)
green, dull olive-green
to brownish, flattish globular (mature plants may become slightly short
columnar) 7-15(-20) cm across, with a somewhat sunken apex.
Ribs: Usually 7-12 (up to 16) , very flat and broad, with
scarcely evident protuberances and often a small horizontal indention
above the areoles.
Areoles: Covered by some tomentum.
Spines: Stout, awl shaped,
glassy white to light-brown in clusters of about 7 mostly straight up
to10-30(-60) mm in length, very symetrical, and tending to curve
upwards, away from the body of the cactus.. no obvious central spine.
The 1 or 2 central spines - when one exists - have the same length.
Flowers: Mostly near the apex,
bell-shaped, pure white or white with a hint of lilac, about 30 mm in length and
diameter. Inner petals are white to light pink, outer petals are a light
purple colour with a dark purple centre strip. Filaments and style are
white. Anthers creamy-white to pale yellow.
Blooming season: Flowers freely
throughout the Summer.
Fruits: Round or barrel shaped, about 20 mm in diameter, red with
scales of the same colour, fruits are juicy and of a carmine colour.
Seeds: Almost nodular, yellowish brown with very fine
protuberances, about 0,7 mm in length, white hilum, long and thin.
is a summer grower species that offers no cultivation difficulties.
Water regularly in summer (but do not overwater ) Keep this plant almost dry in winter at a minimum
temperature of 0°C, prefer relatively rich substrate and
compost (if possible not limestone) otherwise
growth will stop altogether. Feed with a high
potassium fertilizer in summer. It is quite frost resistant if kept dry
(hardy to -5° C)
Sun Exposure: Light shade. It may tolerate
bright situations but is
likely to suffer from sun scorch or stunted growth if over exposed to
during the hottest part of the day in summer. This plant needs plenty of space for
its roots, repotting should be done every other year or when the
it has outgrown its pot. This species is particularly
easy and accommodating, seldom suffer of
Propagation: Direct sow after
last frost. (seldom
Fruit must be significantly
overripe before harvesting seed; clean and dry seeds