Gymnocactus Backeberg (1938)
(Greek gymnos = naked, Latin cactus = cactus)
naked (fruits) cactus
small, roundish, partly clumping, with dainty tubercles, crown with bright wool
to 20 spines, radial, bright
flowers appears on a longish areole, small, purple, pink or white, ovary bare
seeds dull black |
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Distribution |
north-east Mexico to central Mexico - Zacatecas to Hidalgo
very warm steppes |
Growth period |
bright and warm, not in full sun, somewhat half shady
somewhat sensitive against moisture therefore only seldom watering |
Winter period |
dry and bright at 8–10°C (46–50°F)
to constitute flowers requires the early blooming plants in late winter
and early springtime somewhat more of moisture |
Substrat |
minerally and permeable for water with some of loam |
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| Gymnocactus viereckii (E. Werdermann) C. Backeberg (1951) |
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Habitat |
Mexico
Tamaulipas - Jaumave |
Description |
named after H.-W. Viereck
globular, to 7 cm (2.7 in) Ø, blueish dull green, simple or clumping, crown dense wooly
tubercles in about 15–18 rows, about 6 mm high
about 20 radial spines, 1 cm (0.4 in) long, radial white
4 central spines, more than 2 cm (0.7 in) long, over cross, below white, above brown, black tips
1–3 additional spines, shorter
flowers about 2 cm (0.7 in) long, mellow violet pink |
Synonyms |
Echinocactus viereckii E. Werdermann (1931)
Neolloydia viereckii (E. Werdermann) F. M. Knuth (1936)
Thelocactus viereckii (E. Werdermann) H. Bravo (1937)
Pediocactus viereckii (E. Werdermann) Halda (1998)
Turbinicarpus viereckii (E. Werdermann) John & Ríha (1983)
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CITES |
Appendix II since 01. July 1975; Appendix I since 11. June 1992 |
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