Gymnocalycium Pfeiffer ex Mittler (1844)
(Greek gymnos = naked, Greek kalyx = calyx)
naked flower calyx
because of the calyx without spines, bristles and hairs
usually flat globular, in age some thick columnar, very different sizes, simple or clumping
ribs 20 or less;
spines adjacent or outspread, thin to very strong
flowers small short to large funnel shaped, often white or white with red center, however also yellow or red,
calyx bare and scaly; fruits and seeds very different |
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Distribution |
south America - Bolivia, Paraguay, south Brazil to Argentinia
almost complete south America eastern of the Cordilleras
steppes and mountains |
Growth period |
warm and part shady, avoid full sun, temporarily a location outdoor is possible
plants with stronger spines can get more sun
from early summer abundant watering, but standing moisture is to avoid
especially at warm weather not to sparse moisture |
Winter period |
bright and cool, not to dry, at 6–12°C (42–53°F), as possible not under 5°C (41°F)
mountain species occasionally also colder |
Substrat |
nutrient rich, very permeable to water with addition of peat |
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| Gymnocalycium horridispinum G. Frank (1963) |
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Habitat |
Argentinia
Province Córdoba -
southwestern of Salsacate
in about 3281 ft (1000 m) altitude,
on slight slopy hillsides which faces to south or southwestern under grass and herbs |
Description |
wild spines Gymnocalycium
short cylindrical, to 3.1 in (8 cm) Ø, dark green
ribs 11, under the areoles formed into strong chin shaped humps with sharp lengthwise furrows
10–13 radial spines, about 0.8 in (2 cm) long, sturdy, awl-shaped, bended to the body, gray with brown tip
4 central spine, 1.2–1.6 in (3–4 cm) long, stronger, thickened at the base, as a foursome are crossed, stand-away
buds are squat, somewhat tapered, crimson
flowers 2.4 in (6 cm) long and Ø, white with purple rim, also complete purple pink with dark midvein and white center,
about 1 week open, color changed to violet pink
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Comment |
at full sun is somewhat to shade,
slight frost is temporarily possible
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Synonyms |
Gymnocalycium horridispinum G. Frank ex H. Till (1987)
Gymnocalycium monvillei ssp. horridispinum (G. Frank ex H. Till) H. Till (1993) |
| CITES |
Appendix II |
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