Petalonyx parryi Gray. Also known as Parry's sandpaper.May 2, 2004, Washington Co., Utah, approx. 2700 ft. elev. gypsum outcrop (species is a gypsophile), Silver Falls subdivision, approx. 2 miles south/southeast of the town of Washington.An increasingly Utah rare plant species. Growing here with Sphaeralcea ambigua.