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Rebutia canigueralii subs. rauschii f. viridis hort.

Family: CACTACEAE · Variety or form of Rebutia canigueralii

Description

Rebutia canigueralii subs. rauschii f. viridermis|, better known as Sulcorebutia rauschii cv. Green Form, is a morphological form of the variable Rebutia canigueralii subs. rauschii distinguished for the pure green body (not purple-violet). This cactus is indeed beautiful even without its blooms.

Habit: Miniature clustering species (rarely solitary), readily forms clumps of many heads.

Stem: Individual stems 2(4) cm tall, 3(5) cm in diameter. The stem is covered by flat tubercles (5 mm wide) which vary in colour between pale to dark green. In older plants tubercles are arranged in up to 16 spiral line merging in the apex.

Areoles: Long narrow with short white felt.

Spines: 9-11 short black radial spines, 1 to 2 mm long, pointing diagonally and downward, completely flattened against the tubercles, they take the characteristic form of a fish-bone.

Roots: Conical.

Flower: 20-50 mm long, 35-50 mm wide; floral tube funnel-shaped yellowish green with tan coloured scales, tepals deep magenta with a clearer throat.

Fruit: Reddish brown, 4-5 mm wide.

Blossoming time: Late spring.

Origin and Habitat

Zudañez, Chuquisaca, Bolivia

Cultivation and Propagation

These mountainous plants have thick taproots and are susceptible to overwatering. They loves a very permeable, coarse mineral soil as well as to be strictly kept dry throughout the winter quiescent period since it is very sensitive to any moisture excesses, To prevent rottenness it is also advisable to surround its root neck by very rough sand or grit, this help a fast water drainage. They requires also an appropriate air circulation and are sometime grafted to avoid root problems. They need to be kept in a cool place during winter rest (at 0-10°C). This is important for the flowers ,as well as for their health. Without this cool winter period, they normally won’t get any buds.

Grafted plants are very easy to grow, and are quite frost hardy (-5° C) if kept dry. Needs a full sun exposure ( light shadow my be useful in the hottest summer days)

Propagation: Seed, cutting, grafting.

Bibliography

Major references and further lectures

  1. 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

  2. David Hunt, Nigel Taylor “The New Cactus Lexicon” DH Books, 2006

  3. Edward F. Anderson “The Cactus Family” Timber Press, 2001

  4. Anderson E. F.: “The Cactus Family” Timber Press, Portland, Oregon, 2001

  5. Ritter Fr.: “Kakteen in Südamerika” Spangenberg, 1980

  6. John Pilbeam “Sulcorebutia and Weingartia: A Collector’s Guide” Timber Press, 1985

  7. E Haustein “Der Kosmos Kakteenfuehrer (the Kosmos Cactus Guide)” Balogh Scientific Books 01 December 1998

  8. Cullmann W., Götz E., Gröner G.”Kakteen: Kultur, Vermehrung und Pflege - Lexikon der Gattungen und Arten” Ulmer, Stuttgart, 1984