About Echinocereus yavapaiensis M.A.Baker
Echinocereus yavapaiensis M.A.Baker forms small clumps made up of many stems. Its dark green stem body is ovate to cylindrical, growing up to 30 to 48 cm (12 to 19 in) tall, with a diameter of 5 to 8 cm (2.0 to 3.1 in). This cactus has 10 to 14 ribs that often form warts. Its spines are yellow-brown and turn grey with age. Each areole produces 1 to 3 central spines that reach up to 6 cm (2.4 in) long, plus 9 radial spines that grow to 2 cm (0.79 in) long. Broad, funnel-shaped, dimorphic red flowers grow below the shoot tip. These flowers measure 5.4 cm (2.1 in) long and 3.8 cm (1.5 in) in diameter. The chromosome count for this species is 6n=66. This cactus is found growing on bedrock outcrops within desert scrub in Yavapai County, Arizona, at elevations between 1035 and 1860 meters.
