Rebutia senilis var. lilacinorosea

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Rebutia senilis var. lilacinorosea Backeb.
Kaktus-ABC [Backeb. & Knuth] 278, 416. 1936 [12 Feb 1936] (as " lilacino-rosea")
Family: CACTACEAE

= Rebutia senilis var. lilacino-rosea Backeb.
Kaktus-ABC [Backeb. & Knuth] p.416, 1935 / p.278, 516, 1936 / ? Backeb., F.M.Knuth

Accepted Scientific Name: Rebutia minuscula K.Schum.
Monatsschr. Kakteenk. 5: 102, cum xylogr. 1895

Rebutia senilis var. lilacinorosea (Rebutia senilis var. lilacino-rosea) Photo by: Valentino Vallicelli

Origin and Habitat: Salta (Argentina)
Type Locality: Chicoana, 22 km al oeste de El Carril, alt. 2770 m

Synonyms:

Rebutia senilis var. lilacino-rosea Backeb.

Rebutia senilis var. lilacinorosea Backeb.
Rebutia senilis f. lilacino-rosea (Backeb.) Buining & Donald
Rebutia senilis subs. senilis f. lilacino-rosea (Backeb.) Donald

See all synonyms of Rebutia minuscula

Description: Rebutia senilisSN|15395]]SN|15395]] var. lilacino-rosea|SN|15484]] is a small cactus species, with peculiar pink-violet flowers that distinguishes it from other varieties of Rebutia senilisSN|15391]]SN|15395]].
Habitat: It is solitary or clumping and in age can grow clumps 10-15 cm wide. Each head is surrounded by a complete ring of pink-violet flowers produced from around the base of the plant. It begins to offset in about its third or fourth year, eventually making a moderately tight clump, with the individual stems standing out a little on their own.
Roots: Fibrous.
Stem: Squat, depressed globose (or somewhat spherical to slightly elongated in cultivation), deep green, 4-6(-7) cm in diameter and 4-6(-10) cm tall.
Ribs: 16-21 spiralling with low, vertical or slightly spiralled with distinct tubercles.
Tubercles: Low, flat conical in two downward spirals, in ratio 8:13.
Areoles: Circular, about 1 mm wide, brownish white tomentose.
Spines: Approximately 25, radiating to to upright, hardly distinguishable as radials and central, variable, usually few thin, short bristle-like, flexible, translucent and tiny, as with the well- known Rebutia minusculaSN|15395]]SN|15391]] (or fairly long, flexible, and more prolific, as seen on Rebutia senilisSN|15395]]SN|15395]]) whitish, usually with dark tips, 3-15 mm long.in number, 5-10 mm long, pure white.
Flowers: It produces a larger crop of funnel-shaped pink-violet of flowers, about 30 mm long and 35 mm wide, purplish pink, floral tube slender funnel-shaped, outside as well as pericarpel covered with brownish-red, naked scales. Perianth segments lanceolate, fairly uniformly purple-pink with short dark tips. Filaments whitish, anthers yellowish.
Style free to base pink with 4-5 white, spreading stigma lobes slightly protruding the anthers.
Blooming season: It is usually one of the earliest rebutias to flower in spring.
Fruit: Spherical, yellowish red or brownish, to 5 mm in diameter.
Seeds: Oblong, about 1 mm long, testa glossy black, hilum white.

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Subspecies, varieties, forms and cultivars of plants belonging to the Rebutia minuscula group

Rebutia chrysacantha Backeb.: This name is applied to plants with stiffer spines, yellowish with brown tips, and with reddish-orange flowers.
Rebutia chrysacantha var. elegans (Backeb.) Backeb.: has stiff whitish spines and reddish-orange flowers. The name is derived from the overall appearance of the variety, with elegant, neat, spines spirally arranged.
Rebutia grandiflora Backeb.
Rebutia minuscula K.Schum.: is a small clumping cactus species, widespread and extremely variable. Flowers orange-red to violet. Distribution: northern Argentina (Catamarca, Jujuy, Salta and Tucumán)
Rebutia minuscula subs. edeltraudianae n.n.: has yellow-orange flowers (= Rebutia xanthocarpa). Distribution: Sierra Medina, Tucuman, Argentina.
Rebutia minuscula f. kariusiana (Wessner) Donald: has pink-violet flowers and shows transitional characters between Rebutia minuscula subs. violaciflora and Rebutia wessneriana subs. beryllioides.
Rebutia senilis Backeb.: has bristly, glassy, white spines up to 30 mm long that largely covers the stems and very showy orange or crimson blooms. Distribution: Salta, Argentina.
Rebutia senilis var. iseliniana Krainz: has bright orange or orange-red (occasionally yellow) flowers and thinner spines, sometimes pure white, often with a yellowish cast.
Rebutia senilis var. lilacino-rosea Backeb.: has pink-violet flowers that distinguishes it from other varieties of Rebutia senilis.
Rebutia violaciflora Backeb.: has light-violet blossoms in the early spring. It is a selected colour strain.
Rebutia violaciflora var. albispina hort.: has pink-violet flowers and glassy-white spines intermediate between the short, spines of Rebutia minuscula and the long spines of Rebutia senilis.
Rebutia violaciflora var. carminea (Buining) Donald
Rebutia xanthocarpa var. graciliflora Backeb. ex Šída

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Bibliography: Major references and further lectures
1) Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
2) James Cullen, Sabina G. Knees, H. Suzanne Cubey "The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass" Cambridge University Press, 11/Aug/2011
3) David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. "The New Cactus Lexicon" dh books, 2006
4) N. L. Britton, J. N. Rose “The Cactaceae. Descriptions and Illustrations of Plants of the Cactus Family.” Volume 4, The Carnegie Institution of Washington, Washington 1923
5) Curt Backeberg “Die Cactaceae: Handbuch der Kakteenkunde” Gustav Fischer Verlag, Stuttgart New York 1982–1985
6) Willy Cullmann, Erich Götz, Gerhard Gröner “Kakteen” edn 5 - Stuttgart Eugen Ulmer, 1984
7) Backeberg, Curt; "Das Kakteenlexikon" p. 384, 1966
8) Donald, John Donald; "The Classification of the Rebutias" Ashingtonia, 2: 43, 1975
9) Hlinecký, Antonín; "Rod Rebutia K. Schumann"; Fričiana, 5/36: 9, 1965
10) Krainz, Hans; "Rebutia minuscula K. Schumann; Die Kakteen", CVc, 15.7.1960
11) Pilbeam, John; "Rebutia", p. 57, 1997
12)Schumann, Karl Moritz; "Gesamtbeschreibung der Kakteen", p. 395, 1898
13) Šída, Otakar; "Atlas kaktusů", tab. 50, 1991
14) Šída, Otakar; "Rod Rebutia", p. 31, 1997
15) Demaio, P., Lowry, M., Ortega-Baes, P., Perea, M. & Trevisson, M. 2013. Rebutia minuscula. In: IUCN 2013. "IUCN Red List of Threatened Species." Version 2013.2. <www.iucnredlist.org>. Downloaded on 06 January 2014.

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Cultivation and Propagation: Rebutia senilisSN|15395]]SN|15395]] var. lilacino-rosea|SN|15484]] is a free-flowering and easy plant to grow.
Exposition: Full sun to light shade.
Watering: Water regularly in summer but do not over-water. Keep dry in winter. Hardy down to -4°C.
Growing tips: It is better that they be repotted regularly. Repotting will increase the number and size of stems, and will increase the number of flowers produced. Repot yearly until it reaches about 100 mm in size, then every two or three years will suffice. Repotting is best done at the end of winter, but it can be done at other time, too. Do not water for a couple of weeks after repotting, in order to reduce risk of root rot via broken roots.
Propagation: Offsets, seeds.

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