Great Basin fishhook cactus, Sclerocactus pubispinus, Nevada, Snake Range, Black Horse Canyon, Snake Valley drainage, elevation 2090 m (6850 ft).
This is the only yellow-flowered Sclerocactus I am aware of. The species is found in a narrow band straddling the central Nevada-Utah border.
Jumping ahead in 2016 to post these photographs from a May 8-11 expedition to document rare Nevada cacti for ongoing research projects. Then will go back and post the rest of the year!
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