Description
The typical Praecereus euchlorus (Monvillea euchlora) is a shrubby columnar cactus that grows often in thicket or clambering among other vegetatin, with rather slender ribbed stems, weakly erect at first, later arching or decumbent. The flowers are nocturnal, funnel-shaped, white to greenish white up to 8 cm long.
Crested form: The crested forms are cultivated for their beautiful fan-shaped stem. These plants produce monstrous crests, and crests occasionally produce normal shoots. Crested specimens are often grafted on stronger species, called the stock, that can be any number of different columnar cactus. The odd crested forms are extremely rare and may appear both on seedling batches in a very small percentage and in habitat too.
Origin and Habitat
This species has been reported from Brazil, Bolivia, Argentina, and Paraguay.
Bibliography
Major rences and further lectures
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Hunt, D., Taylor, N. and Charles, G. “The New Cactus Lexicon.” dh Books, Milborne Port, UK. 2006
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Machado, M., Taylor, N.P., Braun, P., Oakley, L., Kiesling, R., Pin, A., Loaiza, C. & Ostalaza, C. 2013. Praecereus euchlorus. The IUCN Red List of Threatened Species 2013: e.T151800A562870. http://dx.doi.org/10.2305/IUCN.UK.2013-1.RLTS.T151800A562870.en. Downloaded on 04 July 2016.
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Britton & Rose, “The Cactaceae” 2: f. 43, 46, 47 (1920) — as Cephalocereus smithianus.
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Backeberg, “Die Cactaceae 4” 1960
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James Cullen, Sabina G. Knees, H. Suzanne Cubey “The European Garden Flora Flowering Plants: A Manual for the Identification of Plants Cultivated in Europe, Both Out-of-Doors and Under Glass” Cambridge University Press, 11 August 2011
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J. Hugo Cola-Sanchez & D. Shannon Croutch “Notizen zur Blütenbiologie von Praecereus euchlorus subsp. euchlorus (Cactaceae) - Notes on the floral biology of Praecereus euchlorus subsp. euchlorus (Cactaceae)” in Shumannia 5, pp. 99-103, 2008