Echinocereus mojavensis

Echinocereus mojavensis (Mojave Kingcup) is a species of Echinocereus. It's type locality is on the Mojave River in California.

Background
Cespitose, growing in massive clumps, often forming mounds, with hundreds of stems (500 to 800 have been recorded); stems globose to oblong, 5 to 20 cm. long, pale green; ribs 8 to 13, 5 to 6 mm. high, but becoming indistinct on old parts of stem, somewhat undulate; areoles circular, about 1 cm. apart; spines all white, or in age gray; radial spines about 10, acicular, spreading, curved, 1 to 2.5 cm. long; central spine subulate, porrect or somewhat spreading, often weak, 3 to 5 cm. long; flowers rather narrow, 5 to 7 cm. long, crimson; perianth-segments broad, obtuse or even refuse; areoles on ovary with white felt and short acicular spines; fruit oblong, 2.5 to 3 cm. long. Distributed in Southeastern California to Nevada and Utah, western Arizona, and reportedly from northwestern Mexico.