Biology:Micropuntia
Micropuntia is a monotypic genus of cactus. Its only species is Micropuntia pulchella,[1] synonym Grusonia pulchella.[2] The species is also known as sagebrush cholla. It is a tuberous species of opuntioid cactus from the Great Basin Desert of central Nevada, eastern California and western Utah in the United States.[3][4]
Habitat
Micropuntia pulchella grows in gravelly alluvial fans, often above salt flats or alkali basins. Specimens can be locally common, although they are difficult to locate, often growing under other shrubs such as shadscale.[5]
Description
Micropuntia pulchella differs from other North American opuntioid cacti in having a geophytic habit, where above-ground growth dies back to the crown in adverse conditions, and resprouts under more favorable conditions. Authors have described the underground storage structure as a "tuberous root" or true tuber. The above-ground stems are variable, being cylindrical to globular. The areoles bear flexible yellow spines and white wool. Overall, the above-ground growth can often form a cushion-plant habit. The flowers are bright magenta, and the fruits are dehiscent. The seeds are unique, with a groove running along the hilar surface.[6]
References
- ↑ Cite error: Invalid
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<ref>tag; no text was provided for refs namedPOWO_60426930-2 - ↑ "Micropuntia barkleyana (Syn: Grusonia pulchella)". http://www.cactus-art.biz/schede/MICROPUNTIA/Micropuntia_pulchella/Micropuntia_pulchella_barkleyana/Micropuntia_barkleyana.htm.
- ↑ Anderson 2001, p. 346
- ↑ "Grusonia pulchella | Nevada Natural Heritage Program". http://heritage.nv.gov/taxon_detail/15920.
- ↑ Flora of North America, vol 4. 2004.
Bibliography
- Anderson, Edward F. (2001), The Cactus Family, Pentland, Oregon: Timber Press, ISBN 978-0-88192-498-5
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