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Gymnocalycium gibbosum brachypetalum
P101 (Choele Choel, Rio Negro, Argentina 300m)
This variety has robust
dark style="font-family: Arial">/brown
stems and long
brownish/blackish spines
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Description: Solitary cactus.
Stem: Deep
glaucous-green to grey-black, discoidal that
became elonged with time 10-25 cm tall, up to 12 cm in diameter, the
apex is slightly woolly.
Ribs: 10-16 straight, divided in well distinct angular ribs.
Areoles: Whitish-grey,
elonged.
Radial spines: 5-7 20-35 mm long slightly
bent against the plants body, clear brown with a darker base when young,
that became whitish-grey with a black base as they age.
Central spines: 0-2 very similar to the radials.
Flowers: Infundibuliform
in the nearest periphery just around the apex 45-60 mm
long, 60-65 in diameter. Tepals ivory white with a brownish mid rib or
occasionally reddish, throat greenish with a basal reddish area. Style
white-greenish, stigma white. Anthers cream coloured.
Fruit: Globate or fusiform, 20-40
mm long green with white bordered scales.
Photo of conspecific taxa, varieties, forms and
cultivars of plants belonging to the
Gymnocalycium gibbosum
complex
(This
Taxon
has lots of synonyms
(
like many other Gymnocalyciums)
whit several controversial varieties and subspecies and comprises a multitude of different forms, but where each form
is linked to others by populations of plants with intermediate
characteristics):
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Family:
Cactaceae (Cactus
Family)
Conservation status: Listed in
CITES appendix 2.
Scientific name: Gymnocalycium gibbosum var.
brachypetalum (Spegazzini) Backeberg
In: Kaktus-ABC
:289, 1935
Common Name: Black Chin Cactus
Origin &
habitat: G. gibbosum is
widely distributed in the mountains of Argentina from the south of the
Buenos Aires province to Patagonia and show a great variability in
morphological traits.
Synonyms:
- Gymnocalycium brachypetalum (brachypethalum)
Spegazzini,
in:
Anales de la Sociedad Cientifica de Argentina 99: 135, 1925
- Gymnocalycium gibbosum v. brachypetalum (Spegazzini)
Papsch 1996
- Gymnocalycium gibbosum subsp.gibbosum var. brachypetalum
(Speg.) Papsch,
In:
Gymnocalycium 9(4): 201, 1996
- Gymnocalycium gibbosum var. nigrum Backeberg nom.
inval. (Art. 37.1),
In: Die
Cactaceae 3: 1755,1959
- Gymnocalycium gibbosum ssp. radekii Halda & Milt,
In:
Acta musei Richnoviensis Sect. natur, 9(1):63-64, 2002
- Gymnocalycium nigrum n. n. Backeberg
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Note: Seems to be a pretty variable plant you
might get some other names which are effectively the same plant.... and
also not sure all plants identified as this are really this.
Cultivation:
summer grower
and pretty easy, water
regularly in summer, keep rather dry in winter,
but can handle excessive water to few water, best
for half-shade but grow well in full sun and full shade too (but in
full sun turns an uneven brownish red colour). style="font-family: Arial">
Frost Tolerance: Hardy to -12C.
Seed
Collecting: Permit
fruit to
ripen, fruit must be significantly
overripe before harvesting seed; clean and dry seeds
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Cultivation
and Mail Sale 