Cactus heyderi var. hemisphaericus

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Since 4 Aug 2013

Cactus heyderi var. hemisphaericus (Engelm.) J.M.Coult.
Contr. U.S. Natl. Herb. 3: 97. 1894
Family: CACTACEAE

Accepted Scientific Name: Mammillaria heyderi subs. hemisphaerica (Engelm.) D.R.Hunt
Mammillaria Postscripts 6: 10 (1997)

Cactus heyderi var. hemisphaericus (Mammillaria heyderi subs. hemisphaerica) Photo by: Carolina González

Origin and Habitat: Nuevo León, Tamaulipas, Coahuila, México

Synonyms:

Mammillaria heyderi subs. hemisphaerica (Engelm.) D.R.Hunt

Cactus hemisphaericus (Engelm.) Small
Cactus heyderi var. hemisphaericus (Engelm.) J.M.Coult.
Mammillaria gummifera var. hemisphaerica (Engelm.) L.D.Benson
Mammillaria hemisphaerica Engelm.
Mammillaria heyderi var. hemisphaerica (Engelm.) Engelm.
Mammillaria heyderi f. hemisphaerica (Engelm.) Schelle
Neomammillaria hemisphaerica (Engelm.) Britton & Rose

See all synonyms of Mammillaria heyderi

Description: Mammillaria heyderiSN|20805]]SN|20805]] subs. hemisphaerica is one of the subspecies of Mammillaria heyderiSN|20805]]SN|20805]] which is one of the most widespread and morphologically variable taxon. It is a flattened-globular cactus (often very flat) distinguished from the type species for having 1 central spine and 9-13 radial spines. Flowers are Cream-coloured to dusty pink.

Subspecies, varieties, forms and cultivars of plants belonging to the Mammillaria heyderi group

Mammillaria heyderi Muehlenpf.: It has 1 central spine and 15-22 radial spines; Flowers are cream coloured with brownish-greenish mid-veins.
Mammillaria heyderi var. applanata (Engelm.) Engelm.: It is often the flattest but otherwise very similar to the The ssp. heyderi and may probably repesent only a race of the same species.
Mammillaria heyderi subs. gaumeri (Britton & Rose) D.R.Hunt: It has one central spine and 10-12 radial spines; Flowers are plain creamy-white.
Mammillaria heyderi subs. gummifera (Engelm.) D.R.Hunt: It has 1-2 central spines and 10-12 radial spines: Flowers are reddish-white with darker midviens.
Mammillaria heyderi subs. hemisphaerica (Engelm.) D.R.Hunt: It has 1 central spine and 9-13 radial spines; Flowers are Cream-colored to dusty pink.
Mammillaria heyderi subs. macdougalii (Rose in L.H.Bailey) D.R.Hunt: It has 1-2 central spines which are stouter and 10-12 radials spines; Flowers are cream-colored to pale yellow.
Mammillaria heyderi subs. meiacantha (Engelm.) D.R.Hunt: It has one to none central spines and 5-9 radial spines; Flowers are pink or white with pink mid-viens.

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Bibliography: Major references and further lectures
1) David Hunt, Nigel Taylor “The New Cactus Lexicon” DH Books, 2006
2) John Pilbeam (1999) “Mammillaria The Cactus File Handbook” Nuffield Press.
3) Edward F. Anderson “The Cactus Family” Timber Press, 2001
4) 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

Cactus heyderi var. hemisphaericus (Mammillaria heyderi subs. hemisphaerica) Photo by: Carolina González

Cactus heyderi var. hemisphaericus (Mammillaria heyderi subs. hemisphaerica) Photo by: Diego Armentano

Cactus heyderi var. hemisphaericus (Mammillaria heyderi subs. hemisphaerica) Photo by: Carolina González

Cactus heyderi var. hemisphaericus (Mammillaria heyderi subs. hemisphaerica) Photo by: Carolina González

Cactus heyderi var. hemisphaericus (Mammillaria heyderi subs. hemisphaerica) Photo by: Diego Armentano

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Cultivation and Propagation: This is an easy to grow species, don't requires any special treatment, but need as much light as possible without burning the plant to encourage the heaviest spine formation. Needs a very good drainage with regular water in summer, dry in winter. Avoid any frost.
Propagation: Seeds, offsets (Allow cut surface to callous over before planting).

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