The stem is flat green-grey, the
spines are white thin, curved inward and very close to each other.
Flowers are pale pink with a reddish throat
and often does not open completely.
flattened cactus that can be found very clumped in habitat.
Stem: About 6 cm wide and 4 cm. high.
Ribs: Flat and
tuberculate 8 to 12 (but generally 11), the tubercles are polygonal
+/- rounded divided by short transversal grooves .
Areoles: Oval, covered with a yellowish
tomentum that tends to whiten as they age
Radial spines: 9-13, they are thin of different length, 5-10 mm
long, curved inward and very close to each other. They are white or
sometime with a reddish basal portion.
Central spines: Absent.
Flowers: Pale pink, are born near apex, about 6 cm long and 7.5cm
in diameter. Flower tube is green scaled. They does not open completely.
clavate 1,2-3,5 cm long more or less elonged, epidermis is greenish
with a grey-bluish pruine coat. It is covered by small rounded scales
bordered with white and contains a large quantity of seeds with the
length of 1 mm.
There are many varieties and forms
of G. chaloclorum relatively similar but with stems of variable colour
an size, among them:
- “proliferum” with a little bigger stem
of a darker green colour, and with flowers that open completely,
showing curved petals to the outside and of white, brownish white, or
- “roseiacanthum” with smaller stems of
about 3 cm. wide and 2 cm. high, showing areolas of yellow colour with
twisted spines of pink colour and big flowers of white colour with the
(Boedeker) Y. Ito,
Published in: M. DKG 260; 1952
Origin: Argentina Cordoba, Catamarca, alt. 500 ŕ 1300 m
Conservation status: Listed in
CITES appendix 2.
- Echinocactus calochlorus Boedeker
Published in: Cacti 1952: 90 1952, 1932
- Gymnocalycium calochlorum v. proliferum
Published in: Cactaceae (Backeberg) 3:, 1959
- Gymnocalycium proliferum
- Echinocactus prolifer
- Gymnocalycium proliferum var. calochlorum
Buds and fruits are covered by small rounded
scales bordered with white.
Cultivation: Keep this plant almost dry in winter at a minimum
temperature of -5°C (but it is resistant down to -23 if grown in
ground and very dry), prefers a
growth will stop altogether. The plant tolerate
extremely bright situations but enjoy fresh places and
some shade during the hottest part of the day in summer.
Propagation: Seeds or by
Photo of conspecific taxa, varieties, forms and
cultivars of Gymnocalycium calochlorum.