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 knuthianus (Boedeker) C. Backeberg (1951) |
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Habitat |
Mexico
San Luis Potosi -
Villar, Tampico, Guadalcazar |
Description |
named after Count F. M. Knuth of Knuthenborg in Bandholm
globular to cylindrical, about 6 cm (2.3 in) high, 7 cm (2.7 in) Ø, dark leaf green, clumping
ribs seperated in tubercles
areoles wooly
14–20 radial spines, to 8 mm long, arcuated to the body, glassy, with yellowish base
central spine, to 1 cm (0.4 in) long, with a bright to dark tip
flowers 2–3 cm (0.7–1.2 in) long, usually multiple on the crown, white, with purple-pink midvein
fruits green to red-brown
seeds dark brown to black
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Synonyms |
Echinocactus knuthianus Boedeker (1930)
Neolloydia knuthiana (Boedeker) F. M. Knuth (1936)
Thelocactus knuthianus (Boedeker) Borg (1937)
Pediocactus knuthianus (Boedeker) Halda (1998)
Turbinicarpus saueri ssp. knuthianus (Boedeker) J. Luethy (2002)
Turbinicarpus knuthianus (Boedeker) John & Ríha (1983)
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CITES |
Appendix II since 01. July 1975; Appendix I since 11. June 1992 |
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