Description: G. achirasense
is a (usually) solitary
Stem: Flattened or
globular, grey-green to olive green, 5-6 cm in diameter, up to 5 cm
tall, but in cultivation it can become 7-8 cm high (or more)
Radial spines: Stout 10 up to 12, but usually less in young
plants, bent against the body.
Central spines: Usually absent, or 1 erected
Flowers: Are some of the largest in this genus, often growing
larger than the plant!, 6 up to 7 cm long and wide, dark to light
purple, with a darker
Seeds: Dark brown.
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.
This species has olive green
stems with stout spines.
Photo of of
plants belonging to the Gymnocalycium
Taxon has lots of
synonyms ( like many other
gymnocalycium) whit several controversial
varieties and subspecies and comprises a multitude of different
forms, but where each form is linked to others by populations of plants
Gymnocalycium achirasense H. Till &
Schatzl 1979 ex H. Till
Published in: KuaS 38(8): 191, 1987
Origin: Argentina (San Luis)
Conservation status: Listed in
CITES appendix 2.
- Gymnocalycium monvillei ssp. achirasense
(H. Till & Schatzl ex H. Till) H. Till,
Gymnocalycium 6(3): 102, 1993
- Gymnocalycium horridispinum var.
achirasense (Till & Schatzl) Lodé
Published in: Cactus Aventures International Nr. 27:
29, 1995 und Fichier Encycl. Cact. 16: 1473, 1995
Spines are covered by characteristic