Opuntia chlorotica santa-rita

Griffiths & Hare, New Mexico Agricultural Experiment Station Bulletin 60: 64, 1906

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Details

Opuntia chlorotica var santa-rita is often treated as a stand-alone species (see treatment by Britton and Rose), but we consider it a variety of O. chlorotica herein as it was reported originally and as it was described by Ferguson in 1988. It is an upright species with a distinct trunk up to 6-inches across. The cladodes are suborbicular or orbicular, but may sometimes be oval. Cladodes are about 5- to 7-inches across. Spines are absent, or there may be 1(3) on the edge areoles at the tips of the cladodes. The overall look is essentially spineless. Spines are yellow to reddish-brown, sometimes darker. Britton and Rose described the flowers as very handsome, deep yellow and 2.5 to 3.5 inches across. The cladodes are circular or nearly so; and the plant forms 1 or more distinct trunks. Cladodes are spineless or may have a few spines at their tips. The filaments and style are white; the the stigma is white or yellow-white.  Britton and Rose reported that the type locality is the Solera Mts of AZ. Read the original description. O. chlorotica santa-rita is diploid.

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