Mammillaria lasiacantha Engelmann 1856

GOLF-BALL PINCUSHION, LACE-SPINE CACTUS

Chilita lasiacantha (Engelmann) Orcutt 1926, Ebnerella lasiacantha

(Engelmann) Buxbaum 1951 Mammillaria lasiacantha [var. ] denudata Engelmann 1859, Chilita de-nudata (Engelmann) Orcutt 1926, M. denudata (Engelmann) A. Berger 1929, Ebnerella denudata (Engelmann) Buxbaum 1951 Mammillaria lengdobleriana Boedeker 1936, Chilita lengdobleriana

(Boedeker) Buxbaum 1954 Mammillaria neobertrandiana Backeberg 1952 Mammillaria wohlschlageri Reppenhagen 1987 Mammillaria egregia Backeberg ex H. Rogozinskl & Appenzeller 1989, M. lasiacantha subsp .egregia (Backeberg ex H. Rogozinski & Appenzeller) D. R. Hunt 1998 Mammillaria lasiacantha subsp. hyalina D. R. Hunt 1997

Plants usually solitary, occasionally clustering. Stems small, globose to ovoid, occasionally short cylindrical, gray-green, 1.5-2.5 cm (0.6-1 in) in diameter. Tubercles cylindrical, without latex, axils naked. Central spines absent. Radial spines 26-80 in several series, white to pinkish cream, sometimes felted, 3-5 mm long. Flowers white with reddish midveins, to

Mammillaria lasiacantha subsp. lasiacantha
Mammillaria laui subsp. laui

brownish, to 13 mm (0.5 in) long and in diameter. Fruits ovate to club shaped, scarlet, 12-20 mm (0.5-0.8 in) long. Seeds black. Distribution: Arizona, west Texas, and New Mexico, and Coahuila, Chihuahua, Durango, and Zacatecas, Mexico.

Three subspecies of Mammillaria lasiacantha are recognized. Subspecies lasiacantha has 40-80 chalky white spines that lie close to the body; it occurs widely throughout the range of the species. Subspecies egregia may become somewhat cylindrical with age, has about 50 spines, and tends to have brownish flowers; it occurs in Chihuahua and Durango. Subspecies hyalina has only 26-36 spines; it occurs in Zacatecas.

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