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14b. Cylindropuntia imbricata (Haworth) F. M. Knuth var. argentea (M. S. Anthony) Backeberg, Cactaceae. 1: 195. 1958.
Opuntia imbricata (Haworth) de Candolle var. argentea M. S. Anthony, Amer. Midl. Naturalist 55: 236, fig. 7. 1956
Shrubs, densely branched, to 1.2 m. Stem segments 10-20 cm; tubercles close set. Spines and sheaths silvery. 2n = 22.
Flowering spring (Apr). Chi-huahuan desert scrub with lechuguilla and sotol, rocky limestone slopes, flats, ridges; of conservation concern; 600-700 m; Tex.
Cylindropuntia imbricata var. argentea is a narrow endemic within the Big Bend region, Texas.
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