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Description: Usually solitary, globular glaucous stems, 7 to12 cm in
diameter and across and has a woolly, spiny apex; It has about 35 (30 to
40) slender ribs deeply notched wavy and corrugated; Areoles are at
first covered with white felt.
Spines: Centrals 1 or 2 (to 4), growing one above the other,
which of variable length up to7 cm. long. They are sharp and needlelike,
sometimes flattened, pointing upward at first and then outward,
brownish-black at their apex and somewhat reddish lower down. Radials
(10 to) 15 to 25 slender, almost transparent white, 1-1.5 cm long
straight or slightly curved, and radially arranged, overlapping each
other above the ribs.
Flowers: The flowers are 2 (2,5) cm. long, often remain squeezed
between the apical spines, and have pale yellow, creamy-white or pink
segments with a darker mid-stripe.
Cultivation: It needs very drained soil and less watering
than normal for the genus. Propagation: Seeds (usually) or by the shoots
of adult plants (if available). Exposure: Full sun to light shade, Frost
Tolerance -5°C if kept dry.
It tillers more readily than most other species.
Photo of conspecific taxa, varieties, forms an cultivars:
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