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Sulcorebutia rauschii forma cristata
(Syn: Sulcorebutia canigueralli forma critata)
 

CACTUSPEDIA       

 


 The unmistakable short pectinated spines.
 

Description: The typical Sulcorebutia rauschii is a well known miniature clustering species, that readily forms clumps of many heads with characteristic short pectinate spines. The crested form is very rare and nice..
Stem: Up to
5 cm in width. .The stem is covered by flat tubercles (5mm wide) which vary in colour between dark green and violet.
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 fishbone.
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.

 

Green form


Violet form


Cultivation: Very difficult to find high quality plants of this species in cultivation, S. rauschii 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 and an appropriate air circulation.
For its sensitive roots this species is frequently grafted to avoid root problems.
 Water moderately in the growing season, keep dry during  the winter rest. Needs a full sun, or half shaded exposure (light shadow my be useful in the hottest summer days)
Propagation: Grafting since cutting root hardly.


The cause of cresting: The cause of cresting is not fully explained, biologists disagree as to why some cacti grow in this unusual form. Some speculate that it is a genetic mutation. Others say it is the result of a lightning strike or freeze damage, but whatever the stimulus, the growth point of the stem has switched from a geometric point, to a line, which folds and undulates as the crest expands. Crested Yavia are very rare, cresting occurs naturally and can be encountered in many other cactus species.

Photo gallery: Alphabetical listing of Cactus and Succulent pictures published in this site.

Photo gallery SULCOREBUTIA

Family: Cactaceae (Cactus Family) 

Sulcorebutia rauschii G. Franck 1969
Published  in: Frank G., Kakt. und and. Sukk., 20 (12): 238 - 239 (1969)
Forma cristata

Origin Garden origin (Nursery produced cultivar)

Conservation status: Listed in CITES appendix 2.
 


 

 


Photo of conspecific taxa, varieties, forms and cultivars of plants belonging to the Lobivia canigueralli  complex (This Taxon has lots of synonyms 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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This old page has been moved! Click the link next on the right to enter the new Enciclopedia of Cacti. We hope you find this new site informative and useful.

The Encyclopedia of Cacti