Echinocereus enneacanthus ENGELMANN subsp. enneacanthus
WISLIZENUS. – Mem. Tour North. Mex.: 111 (1848)

Echinocereus enneacanthus, n. sp., ovato-cylindrieus 10-costatus; areolis elevatis, orbicularis, distantibus, junioribus breviter albo tomentosis; aculeis angulatis, compressis, rectis, albis; radialibus 8 subaequalibus, cetitrali singulo longiore, demum deflexo; floris tubo pulvillis 30 – 35 albo-tomentosis setas spinescentes albidas fuscatasque inferioribus 6, superioribus 2-3 gerentibns stipato; sepalis interioribus 10-13 oblongolinearibus, petalis 12-14 lineari-oblongis obtusis s. mucronatis, apice denticulatis; stigmatibus supra stamina brevia exsertis, 8-10 linearibus
elongatis.

Near San Pablo, south of Chihuahua; flowers in April. Plant 5 to 6 inches high, 3 to 4 in diameter; branching from the base; areolae about 1 inch distant from one another, spines stout, angular, like those of E. triglochidiatus, lateral spines 9 to 16, central one 18 to 22 lines long. Flowers 2.5 to 3 inches long, red; spiny bristles in the axills of the lowest sepals (on the ovary) four brown 2 to 4 lines long, and two white 3 to 4 lines long; higher up the number of the brown bristles diminishes, and on the upper part of the tube we find only two white bristles of 6 lines
length in the axills.

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