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Family:
Cactaceae (Cactus
Family)
Scientific name: Coryphantha poselgeriana
(Dietrich 1851) Britton & Rose 1923
Synonyms:
- Echinocactus poselgerianus A.Dietr. 1851
- Mammillaria valida J.A.Purpus (Nom inval.) 1911
- Coryphantha valida (J.A.Purpus) Bremer 1977
- Also known as Coryphantha kieferiana
Origin: It grows in the Mexican states of Coahuila, San Luis
Potosí, Nuevo León, Zacatecas and Durango.
Notes: These
clinal species have two forms, often referred
to as distinct varieties or
subspecies. The forms
from North of the Sierra de Paila are more strongly
spined (var. valida) than the ones South of it, which have
more radials ( var. saltillensis). But the transition is
continuous, and separation of a subspecies is questionable.
Description: This is a heavily spined,
imposing species, and reminds one of an Echinocactus.
The stem is globular, solitary,
or slowly clumping reaching up to 30 cm
in height and 18 cm in breadth;
tubercles up to 2 cm long; one central spine with light tip;
5 to
7 radials
Flowers: 6-7 cm, varying from ish-rose with
a pink center, to
carmin red, and in San Luis Potosí even yellow-flowering forms occur.
Cultivation: This plant grows in the same habitat
as
Echinocactus horizonthalonius, with which it has some
cultivation problems in common: slow-growing, seldom reaching the same
size as in nature, sensitive against over-watering. Water sparingly.
It
needs good drainage. Keep drier in winter, Full sun to partial shade.
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