Gymnocalycium ferox var. ferocior

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Since 4 Aug 2013

Gymnocalycium ferox var. ferocior (Backeb.) Slaba
Kaktusy (Brno) 20(4): 83. 1984 nom. inval. basionym not validly published
Family: CACTACEAE

: Gymnocalycium castellanosii subs. ferocius (Backeb. ex H.Till & Amerh.) G.J.Charles
Cactaceae Syst. Init. 20: 18. 2005 [Nov 2005] (a.k.a.as "ferocior")

Gymnocalycium ferox var. ferocior (Gymnocalycium castellanosii subs. ferocius) Photo by: Valentino Vallicelli
The spines are very strong, stiff and impressive.

: Cordoba, Argentina
Type Location: Agua de Ramon and adjacent areas, Córdoba (Argentina)

Gymnocalycium castellanosii subs. ferocius (Backeb. ex H.Till & Amerh.) G.J.Charles

Gymnocalycium ferox var. ferocior (Backeb.) Slaba
Gymnocalycium hybopleurum var. ferocius Backeb.
Gymnocalycium mostii subs. ferocius Backeb. ex H.Till & Amerh.

:
Gymnocalycium castellanosii Backeb.
Kaktus-ABC [Backeb. & Knuth] 287, 416. 1936 [12 Feb 1936]
: 5

Gymnocalycium castellanosii Backeb.
Gymnocalycium castellanosii subs. acorrugatum (J.G.Lamb.) R.Kiesling & D.Metzing

Gymnocalycium acorrugatum J.G.Lamb.

Gymnocalycium ferox (Backeb.) Slaba

Gymnocalycium hybopleurum var. ferox Backeb.

:
Gymnocalycium castellanosii subs. bozsingianum (Schütz) Amerh. & H.Till
Gymnocalycium 19(3): 675. 2006 [Aug 2006]
: 3

Gymnocalycium castellanosii subs. bozsingianum (Schütz) Amerh. & H.Till

Gymnocalycium bozsingianum Schütz
Gymnocalycium castellanosii var. bozsingianum (Schütz) Piltz

:
Gymnocalycium castellanosii subs. ferocius (Backeb. ex H.Till & Amerh.) G.J.Charles
Cactaceae Syst. Init. 20: 18. 2005 [Nov 2005] (a.k.a.as "ferocior")
: 4

Gymnocalycium castellanosii subs. ferocius (Backeb. ex H.Till & Amerh.) G.J.Charles

Gymnocalycium ferox var. ferocior (Backeb.) Slaba
Gymnocalycium hybopleurum var. ferocius Backeb.
Gymnocalycium mostii subs. ferocius Backeb. ex H.Till & Amerh.

: Solitary, strongly armed cactus.
Stem: Dark green, depressed globose, up to 13 cm in diameter, 6-7 cm tall.
Ribs: Deeply notched, with prominent, chin-like tubercles.
Spines: Subulate, stout, thick and curving, yellowish or amber-coloured with darker tips, becoming grey with age.
Central spine: 1(-2), 18 to 20 mm long.
Radial spines: 7-11, unequal, 6 to 22 mm long.
Remarks: The taxonomy of this species is not clear. The former synonym Gymnocalycium castelanosii (As indicated by Backeberg) seems to be incorrect, and Slaba also separated it from Gymnocalycium hybopleurumSN|15762]]SN|15762]] (Gymnocalycium hybopleurumSN|15762]]SN|15762]] v. ferox backbg). Prevalently, this controversial species is now considered as Gymnocalycium mostii ssp. ferocior.

Gymnocalycium castellanosii Backeb.: has heavy spines bent backward, stem dull green or bluish-green with 10-12 ribs. Central spines 0-2, radials 5-7(-8). Distribution: La Rioja, San Juan and Cordoba.
Gymnocalycium castellanosii subs. bozsingianum (Schütz) Amerh. & H.Till: has grey green epidermis, c. 12 rounded ribs with low tubercles, 5 needle-like radial spines3-20 mm long, 0-1 central spine. Distribution: Chepes Viejo, La Rioja, Argentina.
Gymnocalycium castellanosii subs. ferocius (Backeb. ex H.Till & Amerh.) G.J.Charles: has dark green stems, ribs deeply notched. Spines stout and thick. Centrals 1(-2), 18-20 mm long, radials 7-11, 6-22 mm long. Distribution: Agua de Ramon, Córdoba.
Gymnocalycium ferox (Backeb.) Slaba: has ferocious thick spines (same as: Gymnocalycium castellanosii subs. ferocius?). Distribution: Cordoba and La Rioja, Argentina.

Gymnocalycium ferox var. ferocior (Gymnocalycium castellanosii subs. ferocius) Photo by: Cactus Art

Gymnocalycium ferox v. ferocior VS925 Aguas de Ramon, Cordoba (Gymnocalycium castellanosii subs. ferocius) Photo by: Valentino Vallicelli

Gymnocalycium ferox var. ferocior (Gymnocalycium castellanosii subs. ferocius) Photo by: Valentino Vallicelli

: Summer-growing and pretty easy, water regularly in summer, and keep rather dry in winter. However it can handle excessive water to little water. It grows well in full sun or half sun, too (but in full sun it will form stronger spines).
Propagation: Seeds (it seldom produces offsets). Seed Collecting: Permit fruit to ripen. Fruit must be significantly overripe before harvesting seed; clean and dry seeds

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