Echinocereus rigidissimus subsp. rubispinusWhile some species of Echinocereus have wild spines and a
Echinocereus rigidissimus subsp. rubispinusWhile some species of Echinocereus have wild spines and a ferocious appearance, others like E. rigidissimus have neat spines which are pressed closely against the body. This species occurs in both the United States (Arizona and New Mexico) and to the south in Mexico (Sonora and Chihuahua). The subspecies rubispinus (the “ruby-spined” cactus, also known as the rainbow cactus) is from Chihuahua, in the southeastern part of this range. Though the huge flowers do not last long, they are a breathtaking sight.-Brian -- source link
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