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| Cactus collection-Holzheu |
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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 (C. Backeberg) C. Backeberg (1951) |
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Habitat |
Mexico
Nuevo León - region of Dr. Arroyo
on limestone scree between tussocks |
Description |
underground growing Gymnocactus
oblong, ± clavate, about 5 cm (2 in) long, to about 3 cm (1.2 in) Ø, leaf green, simple with long necked tap root
young areoles with many white wool
about 16 radial spines, to 6 mm long, radial, white
2 central spines, 2 cm (0.7 in) long, one is erected, blackish gray
bristles more than 3 cm (1.2 in) long, adjacent, white
flowers 3 cm (1.2 in) Ø, pink violet, self-pollination
fruits globular, wine-red
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Synonyms |
Echinocactus subterraneus C. Backeberg (1932)
Thelocactus subterraneus (C. Backeberg) C. Backeberg & F. M. Knuth (1936)
Rapicactus subterraneus (C. Backeberg) F. Buxbaum & H. Oehme (1942)
Neolloydia subterranea (C. Backeberg) H. E. Moore (1975)
Turbinicarpus subterraneus (C. Backeberg) A. Zimmerman (1991)
Pediocactus subterraneus (C. Backeberg) Halda (1998)
Turbinicarpus mandragora ssp. subterraneus (C. Backeberg) J. Luethy (1999)
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CITES |
Appendix II since 01. July 1975; Appendix I since 11. June 1992 |
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