Parodia microsperma var. setifera

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Parodia microsperma var. setifera (Backeb.) Brickwood
Mitteilungsbl. Inter-Parodia-Kette 22: 14. 2004 - Remarks: not seen; from Repert. Pl. Succ. 55: 11. 2006
Family: CACTACEAE

Accepted Scientific Name: Parodia microsperma (F.A.C.Weber) Speg.
Anales Soc. Ci. Argent. 96: 70. 1923

Parodia microsperma var. setifera Photo by: Carolina González

Origin and Habitat: Salta, Argentina.
Altitude range: 600 to 2.500 metres above sea level.

Synonyms:

Parodia microsperma var. setifera (Backeb.) Brickwood

Parodia setifera Backeb.

See all synonyms of Parodia microsperma

Description: Parodia microspermaSN|11718]]SN|11718]] var. setifera is a morphological or geographical form of the extremely variable Parodia microspermaSN|11718]]SN|11718]]. Characteristic of this frequently offered cactus are its thin bristly radial spines and its yellow flowers.
Derivation of specific name: The specific name “setifera” means “bearing silky bristles”, probably in reference of the thin silky spines of this species.
Stems: Solitary, when young flattened-spherical, up to 80 mm wide, dark green, becoming elongate as high as 150 mm or more in older specimens; crown woolly and slightly depressed.
Ribs: About 18 narrow, 6 mm high, not slitted in tubercles with areoles separated only by shallow grooves so that the ribs can be easily defined.
Areoles: Oval, slightly white tomentose, 6 mm apart.
Radial spines: About 20 white, thin, bristle-like, 5-8 mm long.
Central spines: 3-4 needle-like, reddish to black, usually lighter toward the base, 10-30 mm long; the lowermost one the longest, hooked or slightly bent at the tip, other central spines straight.
All central spines at first almost vertical, with time the strongest ones curve downwards.
Flowers: About 35 mm long and wide, pale yellow. Pericarpel 6 mm wide, yellow-green at base, scales about 1 mm long pink in the upper half, with short wavy bristles. Floral-tube yellow, with narrow, about 2 mm long, pink scales, with abundant white hair and dark bristles. Tepals inside and outside pure yellow with no traces of red colour, 4-5 mm wide. Filaments yellow.
Fruits: Spherical, thin, brownish-green or reddish-brown.
Seeds: Sbout 0.3 mm in diameter, medium brown, shiny.

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Subspecies, varieties, forms and cultivars of plants belonging to the Parodia microsperma group

Parodia microsperma (F.A.C.Weber) Speg.: is very variable and has received a large number of names. It has green globose stems with long, hooked central spines, the radials are thin and flexible, and the flowers yellow to orange to red. Distribution: southern Bolivia and northern Argentina.
Parodia microsperma subs. aureispina (Backeb.) Brickwood: has dense white and yellow spines and bright yellow flower. Distribution: Southern Bolivia, northern Argentina.
Parodia microsperma var. dichroacantha (F.H.Brandt & Weskamp) Brickwood: has strong hooked central spines, rigid radials spines and bright orange-red flowers. Distribution: Salta, Northwest Cafayate (and Tucumán?)
Parodia microsperma var. dichroacantha f. cristata hort.: Crested form.
Parodia microsperma var. herzogii (Rausch) Brickwood: has deep orange to blood red flower to 4 cm across.
Parodia microsperma subs. horrida (F.H.Brandt) R.Kiesling & O.Ferrari: has reddish-grey cylindrical stems with either hooked or straight central spines, the radials are rigid, and the flowers yellow. Distribution: Salta, Argentina.
Parodia microsperma var. malyana (Rausch) Brickwood: has short reddish central spines and flowers ranging from yellow to orange and red. Distribution: Catamarca, Argentina.
Parodia microsperma var. mutabilis (Backeb.) Brickwood: has strong, yellow spination and yellow flower. Distribution: Salta, Northern Argentina.
Parodia microsperma var. rubristaminea (F.Ritter) Brickwood: has filaments of the stamens bright carmine to brownish-cinnabar.
Parodia microsperma subs. sanguiniflora (Backeb.) Brickwood: has blood red flowers. Filaments of the stamens carmine. Stylus reddish to pale yellowish; Stigma light-yellow to nearly white. Distribution: Southern Bolivia, northern Argentina.
Parodia microsperma subs. sanguiniflora f. brevispina (monstruosa) hort.: monstrous plant with short spines and short red flowers. It is a highly branching cactus that forms clumps.
Parodia microsperma var. setifera (Backeb.) Brickwood: Characteristic of this cactus are its thin bristly radial spines and its yellow flowers. Distribution: Salta, Argentina.
Parodia microsperma var. weberiana (F.H.Brandt) J.G.Lamb.: has large orange red to golden yellow flowers. Distribution: Salta (El Naranjo, El Tala), Argentina.
Parodia talaensis F.H.Brandt: has bright orange flowers and dense white and yellow spines. Distribution: Salta / Tucuman

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Bibliography: Major references and further lectures
1) Backeberg C., "Die Cactaceae", 3 : 1595, 1959
2) Backeberg C., Knuth F. M., "Kaktus-ABC", p. 272, 1935
3) Brandt F. H., "Kakt. Orch.-Rundschau", 3 : 37, 1982
4) Buining A. F., "Succulenta", 44 : 37, 1965
5) Cocker W. De, "Cactus, Antwerpen", p. 72-76, 1969
6) Hummel U., "Formenkreis Parodia setifera, rukopis", 1986
7) Köhler U., "Kakt. und and. Sukk.", 14 : 177, 1963
8) Werdermann E., "Blüh. Kakt.", tab. 144, 1938
9) Weskamp W., "Kakt. und and. Sukk.", 32 : 183-184, 1981
10) Miroslav Veverka. “Parodia setifera Backeb. var. setifera” Chrudimský kaktusář on line http://www.cact.cz/galerie_test/detail.php?id=99

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