Escobara albicolumnaria Hester 1941

silver-lace cob cactus, white column Mammillaria albicolumnaria (Hester) Weniger 1970, Coryphantha albicolumnaria (Hester) D. A. Zimmerman 1972

Plants solitary with occasional branching, short oblong to cylindrical, to 25 cm (9.8 in) high, 4-6.5 cm (1.6-2.6 in) in diameter. Tubercles rigid, 4-8 mm (to 0.3 in) long, grooved on the entire upper surface. Central spines 11-15, white, 1218 mm (0.5-0.7 in) long, 2-4 slightly larger than the others. Radial spines 25-30, spreading, some bristle-like, white, 4-10 mm (to 0.4 in) long. Flowers pink, to 2 cm (0.8 in) long, 1.51.8 cm (0.6-0.7 in) in diameter. Fruits oblong, yellowish green to pink, 1-1.7 cm (0.4-0.7 in) long, 5-7 mm (0.2-0.3 in) in diameter, occasionally with one or two small scales. Distribution: a small area in Brewster County, Texas.

Escobaría albicolumnaria

Escobaría albicolumnaria

Escobaría chihuahuensis subsp. henricksonii

Escobaría alversonii (J. M. Coulter) N. P. Taylor 1997 foxtail beehive cactus, foxtail cactus Cactus radiosus var. alversonii J. M. Coulter 1894, Mammillaria alversonii (J. M. Coulter) Walton 1898, Coryphantha alversonii (J. M. Coulter) Orcutt 1926, Escobaría vivípara var. alversonii (J. M. Coulter) D. R.Hunt 1978

Plants usually several-stemmed. Stems forming underground cylindrical branches. Central spines 8-10, tipped dark red or black, 12-16 mm (0.5-0.6 in) long. Radial spines 12-18, white, 12-20 mm (0.5-0.8 in) long. Flowers magenta to pink, about 3.2 cm (1.3 in) in diameter. Distribution: southeastern California into adjacent Arizona.

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