Publication: Kakteen Sukk. 48(3): 61 (1997)
Description
Frailea buenekeri subs. densispina is a beautiful little plant of no more than about 3cm in diameter, with a dark green to winered epidermis, many ribs divided into low tubercles, and areoles with a dozen or so creamy yellow to white radial spines appressed against the body of the plant and pointing downwards. Below each areole there is a faint, dark, crescent-shaped mark. The plants are globular, becoming columnar in age. Another characteristic of this taxon is the tuberculate spines, which have small projections along them, thus creating the illusion of being slightly feathered.
Origin and Habitat
Frailea buenekeri subs. densispina grows in granitic rock outcrops, in pockets of soil between the rocks, together with Frailea pygmaea, mosses, lichens, grasses and other vegetation.
Bibliography
Major references and further lectures
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Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
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David R Hunt; Nigel P Taylor; Graham Charles; International Cactaceae Systematics Group. “The New Cactus Lexicon” dh books, 2006
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Larocca, J., Machado, M. & Duarte, W. 2013. Frailea buenekeri. The IUCN Red List of Threatened Species. Version 2014.3. <www.iucnredlist.org>. Downloaded on 07 May 2015.
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Marlon C Machado “Fascinating Frailea, Part 2: Review of the species from Rio Grande do Sul” Cactus World (BCSS) Volume 25 No. 2 June 2007
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