(Gymnocalycium) This group contains 80 variable species. They are natives of South American countries from Argentina, north to Bolivia, Paraguay, Uruguay, and Brazil. The plants range from small stems, 11/2 inches across, to stems 8 inches wide and high. They range in color from blue-green to gray or brown. Most of the species flower profusely and ...
Found on http://www.encyclo.co.uk/local/10004
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