Cylindropuntia echinocarpa

Cylindropuntia echinocarpa (Silver Cholla) is a series of Cylindropuntia.

Background
The plant is usually low, but sometimes 1.5 meters high, much branched and widely spreading, with a short woody trunk 2 to 3 cm. in diameter, in age with nearly smooth bark; joints short, turgid, strongly tuberculate; spines numerous, when young bright yellow, when oldet brownish, or in age grayish, unequally covered with thin papery sheaths; flowers yellowish, but the sepals often tipped with red; ovary short, turbinate, densely spiny especially in the upper part; fruit dry, very spiny; seeds somewhat angular, 4 mm. broad. Type locality is in the Colorado Valley near the mouth of Bill Williams River. It is distributed in Nevada, Utah, Arizona, California, and Lower California.