Echinocereus knippelianus

Echinocereus knippelianus is a species of Echinocereus.

Background
At first simple, stout, a little higher than broad, about 10 cm. high, but in cultivation elongated, branching, very deep green, becoming turgid and flabby; ribs 5 to 7, more prominent upwards the top of the plant, sometimes strongly tuberculate, at other times only slightly sinuate; white-felted, 5 to 6 mm. apart; spines 1 to 3, weak, 3 to 6 mm. long, yellow; flowers pinkish, 2.5 to 3 cm. long; perianth-segments spreading, oblanceolate, acute; style cream-colored; fruit not known. Distributed in Mexico, but range unknown.