Echinocereus longisetus

Echinocereus longisetus is a species of Echinocereus. It's type locality is Santa Rosa, south of the Rio Grande in Coahuila.

Background
Plants simple or nearly so, cylindric, 15 to 25 cm. long, 5 to 7.5 cm. in diameter; ribs 11 to 14, somewhat tubercled; areoles circular; spines slender, elongated, white; radial spines 18 to 20, spreading, the lower 10 to 15 mm. long, much longer than the upper; central spines 5 to 7, very unequal, the lower elongated, 2.5 to 5.5 cm. long, deflexed; flowers said to be red. Distributed in Coahuila.