Publication: Cactaceae Consensus Init. 3: 8 1997
Description
Echinocereus adustus subs. schwarzii is a remarkable large flowered variety closely related to Echinocereus adustus. It has more central spines (1-5), as many as 15 radials, and flowers to 8 cm long and 7 cm in diameter.
Derivation of specific name: “schwarzii” For Fritz Schwarz (fl. 1940, 1955)
Origin and Habitat
Echinocereus adustus subs. schwarzii is found only in Durango, Mexico.
Cultivation and Propagation
In culture Echinocereus adustus subs. schwarzii is without problems, easy to grow, very attractive and regularly shows its beautiful flowers, if provided with an adequate winter rest period.
Moisture: It is sensitive to over-watering (rot prone), and needs good drainage. In the winter keep it cool, and absolutely dry conditions.In summer keep it well watered when it’s hot.
Exposure: Needs full sun. To achieve the best spine density give these plants lots of sun.
Hardiness: Very cold resistant above -12° C or less for short periods of time. In the summer they need an airy location in bright sun; In mild climate they grow well when planted freely outside in well-drained soil.
Propagation: Seeds (usually), it also can be grown from cuttings, as it can branch from the base.
Bibliography
Major references and further lectures
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Edward Anderson “The Cactus family” Timber Press, Incorporated, 2001
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Taylor, N. “The Genus Echinocereus” Royal Botanic Gardens Kew 1985
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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/Aug/2011
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Urs Eggli, Leonard E. Newton “Etymological Dictionary of Succulent Plant Names” Springer Science & Business Media, 29 June 2013
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Hunt, D., Taylor, N. and Charles, G. (compilers and editors). 2006. “The New Cactus Lexicon”. dh Books, Milborne Port, UK.
