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 gielsdorfianus (E. Werdermann) C. Backeberg (1951) |
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Habitat |
Mexico
San Luis Potosi -
Municipio of Ciudad del Maiz,
on hills and in chinks of lime rocks
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Description |
named after Karl Gielsdorf, longstanding expert cacti grower on the botanical Garden, Berlin-Dahlem, 1888–1973
globular, dull yellowish to blue-gray-green, seldom clumping
tubercles conical to pyramidal, spirally
areoles with short furrow extensions
6–8 radial spines, to 2 cm (0.7 in) long, thin awl-shaped,
± arcuated, dark brown, tip blackish,
later falling off
flowers 2.5 cm (1 in) long, white; seeds rotund, black
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Synonyms |
Echinocactus gielsdorfianus E. Werdermann (1929)
Neolloydia gielsdorfiana (E. Werdermann) C. Backeberg & F. M. Knuth (1936)
Thelocactus gielsdorfianus (E. Werdermann) Borg (1937)
Pediocactus gielsdorfianus (E. Werdermann) Halda (1998)
Turbinicarpus gielsdorfianus (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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