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Origin and Habitat: Bolivia (Western South America, Southern America)
San José de Chiquitos, Chiquitos
Gymnocalycium damsii var. torulosum Backeb.
Descr. Cact. Nov. 3: 6. 1963 nom. inval. (type specimen, a living culture); et H.Till & Amerh. Gymnocalycium 17(1): 553 (-554; abb. 17-19). 2004 [Feb 2004]
Subspecies, varieties, forms and cultivars of plants belonging to the Gymnocalycium anisitsii group
Gymnocalycium anisitsii is a very polymorphic species with a large range of variability. Two subspecies are recognized, the nominate form and subsp. multiproliferum. There seems to be very little justification for vars. centrispinum, rotundulum, torulosum and tucavocense. Gymnocalycium griseopallidum from the salt-pan desert area on the Bolivia-Paraguay borders may well be another variety or local form which has become adapted to the peculiar local conditions of that region.
- Gymnocalycium anisitsii (K.Schum.) Britton & Rose: may be solitary or freely offsetting with white flowers. Spines 5 to 7, tortuous, up to 6 cm. long. It is a very polymorphic species with a large range of variability. Distribution: Bolivia, Paraguay.
- Gymnocalycium anisitsii subs. damsii (K.Schum.) G.J.Charles: Spherical-depressed up to 10 cm tall, 8-15 cm in diameter, green to brownish-green, often with horizontal strips. Ribs broad to acute, and more or less notched.
- Gymnocalycium anisitsii subs. damsii f. cristatum hort.: crested form.
- Gymnocalycium anisitsii subs. damsii f. monstruosum hort.
- Gymnocalycium anisitsii var. griseopallidum H.Till & Amerh.
- Gymnocalycium anisitsii subs. holdii Amerh.
- Gymnocalycium anisitsii subs. multiproliferum (P.J.Braun) P.J.Braun & Esteves: has numerous violet-green stems, longer spines, and rose-colored flowers. Distribution Mato Grosso do Sul, Brazil.
- Gymnocalycium anisitsii var. tucavocense Backeb. ex H.Till & Amerh.: has beautiful deep mauve to violet flowers, is remarkably prolific in branching and very precocious flowering.
- Gymnocalycium anisitsii var. tucavocense cv. Red Form: it is a garden selection characterized by an unusual bright red colouring of the body, this colour is due to a reduced production of chlorophyll pigments.
- Gymnocalycium anisitsii subs. volkeri Amerh.
- Gymnocalycium damsii var. boosii Amerh.: has longer, thin, flexible usually twisted spines up to 6 cm long. Flowers bright pink or carmine-red. Distribution: S-E of Chocis, Santa Cruz, Bolivia.
- Gymnocalycium damsii var. centrispinum Backeb.
- Gymnocalycium damsii subs. evae Halda, Horáček & Milt
- Gymnocalycium damsii var. rotundulum Backeb.
- Gymnocalycium damsii var. torulosum Backeb.
- Gymnocalycium damsii cv. Purple Blush: has purple blushed stems and nice pink blooms. It seems related to Gymnocalycium damsii var. tucavocense to which it shares many characteristics.
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