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 subterraneus var. zaragosae C. Glass & R. A. Foster (1976) |
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Habitat |
Mexico
Nuevo León -
bei Zaragosa auf Gipsfelsen |
Description |
like beet root thickened roots
body with narrow base, otherwise clavate, 3.5–4 cm (1.3–1.5 in)
Ø
20–25 radial spines, 3–6 mm long, glassy white with dark tip, acicular,
outspread, sometimes with some additional, bristles like, to 2 cm (0.7 in) long spines
(1–) 2 central spines, the upper
± 1.6 cm (0.6 in), ascending, the lower 1–1.5 cm (0.4–0.6 in) long,
distant, glassy white, with dark tip
flowers funnel shaped, yellowish to brownish, with reddish midvein
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Synonyms |
Thelocactus subterraneus var. zaragosae (C. Glass & R. A. Foster) H. Bravo (1980)
Neolloydia subterranea var. zaragosae (C. Glass & R. A. Foster) E. F. Anderson (1986)
Turbinicarpus subterraneus var. zaragosae (C. Glass & R. A. Foster) A. Zimmermann (1994)
Turbinicarpus zaragosae (C. Glass & R. A. Foster) C. Glass & A. Hofer (1997)
Pediocactus subterraneus var. zaragosae (C. Glass & R. A. Foster) Halda (1998)
Neolloydia subterranea ssp. zaragosae (C. Glass & R. A. Foster) Doweld (1999)
Neolloydia zaragosae (C. Glass & R. A. Foster) Doweld (2000)
Rapicactus subterraneus ssp. zaragosae (C. Glass & R. A. Foster) J. Luethy (2003)
Turbinicarpus mandragora ssp. zaragosae (C. Glass & R. A. Foster) J. Luethy (1999)
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CITES |
Appendix II since 01. July 1975; Appendix I since 11. June 1992 |
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