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  Gymnocalycium damsii var. rotundulum
(Syn: G. anisitsii ssp. damsii)
CACTUS ART
NURSERY

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of Cacti and Succulents.


They flower from spring to fall, and handle full sun to full shade,  also the spines are nearly useless in terms of defense so a pretty 'user-friendly' plant.
 

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Photo of conspecific taxa, varieties, forms and cultivars
 
of plants belonging to the Gymnocalycium anisitii  complex
(This Taxon has lots of synonyms ( like many other cacti) with several controversial varieties and subspecies):


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Family: Cactaceae (Cactus Family)

Gymnocalycium damsii var. rotundulum

This is an invalid name but widely used in cactus collections.

Backeberg nom. inval. (Art. 8.2), Descriptiones Cactacearum Novarum 3: 6,1963

Accepted Scientific name: Gymnocalycium anisitsii ssp. damsii (Schumann) G. Charles
Published in: CSI 20: 17, 2005

Conservation status: Listed in CITES appendix 2.

Other Synonyms:

  • Gymnocalycium rotundulum (rotundolum)
  • Gymnocalycium damsii  (K. Schumann 1903) Britton & Rose
    The Cactaceae 3: 163
  • Gymnocalycium damsii var. rotundum

Origin: Brazil, Bolivia, Paraguay.

Habitat: G. damsii (anisitsii) grows in open areas under the protection of low bushes. It often form large groups and is extremely variable.
 

Description: Gymnocalycium rotundulum (G. damsii var. rotundulum) is a usually solitary colourful cactus, characterized by  rounder and scarcely raised tubercles.
But it is very similar (if not identical)  to the standard G. damsii and it is  is probably the exact same plant.
Stem: Up to 10 cm tall , 8-10 cm in diameter colourful  and highly decorative, with characteristic horizontal clear and dark strips. The clear areas (above the areoles) are pastel-grey-pink while the dark zone (below the areoles) are deep olive-green to brown-purple.
Spines:  Nearly useless in terms of defence.

Note: Seems to be a pretty variable plant you might get some other names which are effectively the same plant.... and also not sure all plants identified as this are really this.
 

 


Cultivation: It is a summer grower species that offers no cultivation difficulties.  Water regularly in summer (but do not overwater ) Keep this plant almost dry in winter at a minimum temperature of 0C, prefer relatively rich substrate and  low pH  compost (if possible not limestone) otherwise growth will stop altogether. Feed with a high potassium fertilizer in summer. It is quite frost resistant if kept dry (hardy to -5 C)
Sun Exposure: Light shade. It may
tolerate bright situations  but is
likely to suffer from sun scorch or stunted growth if over exposed to direct sunlight during the hottest part of the day in summer. This plant needs plenty of space for its roots, repotting should be done every other year or when the it has outgrown its pot. This species is particularly easy and accommodating, seldom suffer of cryptogamic diseases.
Propagation: Direct sow after last frost. (seldom produces offsets)

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

Photo gallery Gymnocalicium

Home | E-mail | Plant files | Mail Sale Catalogue | Links | Information | Search

All the information and photos in cactus art file are now available also in the new the Enciclopedia of Cacti. We hope you find this new site informative and useful.