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Family:
Cactaceae (Cactus
Family)
Scientific name: Coryphantha difficilis (Quehl) A.Berger
1929
Synonyms:
- Mammillaria difficilis Quehl 1908.
- Coryphantha densispina Werdermann in Fedde 1932
Origin: Grows in the Mexican state of Coahuila
Description:
Solitary.
Stem: Spherical to short
cylindrical bluish-Gray green
stems up to 8 cm tall , 6 cm in diameter.
Tubercles: The
tubercles are oblique and their outer end points outwards.
Central spines: 0-4 up to 3 cm long
Radial spines: 12 to 14 , up to 2 cm long ( Similarly to
Coryphantha
salinensis two types of
radial spines can be differentiated: lower, stiff, regularly
radiating, often only 10 mm long spines and upper, longer (up to 20 mm)
often bundled spines.)
Flowers: The
flowers are large purely yellow, without any red in the
throat.
Cultivation:
In
culture, contrary to its name "difficilis" (difficult) this
species does not show special problems, but it is very
slow-growing. In C.difficilis the observation of the plant
development from
radial spined
youth-forms to the definite, wildly spined outlook is particularly
interesting.
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