Difference between revisions of "Mammillaria heyderi var. bullingtoniana"
Cact. Succ. J. (Los Angeles) 48: 138, figs. 1, 2. 1976.
Common names: Cream cactus
Illustrated
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|publication year=1976 | |publication year=1976 | ||
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|subfamily=Cactaceae subfam. Cactoideae | |subfamily=Cactaceae subfam. Cactoideae | ||
|genus=Mammillaria | |genus=Mammillaria | ||
Latest revision as of 21:58, 5 November 2020
Stems 5–11 × 5–12(–15) cm; tubercles 11–25 × 4–8 mm. Spines usually 10–14 per areole; radial spines usually 10–14 per areole, abaxial radial spines 9–15 mm diam; central spines, when present, 0.35–0.45 mm diam. Flowers 2.2–3.3 × 1.7–3 cm. 2n = 22.
Phenology: Flowering Mar–May; fruiting Nov–May.
Habitat: Chihuahuan desert scrub, desert grasslands, lower edge of oak zone
Elevation: 1200-2100 m
Distribution
Ariz., N.Mex., Mexico (Chihuahua).
Discussion
L. D. Benson’s (1982) concepts of Mammillaria gummifera varieties all included material of M. heyderi var. bullingtoniana. The stems, spines, and tubercles of var. bullingtoniana average about one-fourth larger than var. heyderi in all dimensions.
Selected References
None.
Lower Taxa
None.