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Guy L. Nesom +
(A. Nelson) Ced. Porter +
Amphiachyris fremontii var. spinosa +
Ariz. +, Calif. +, Nev. +  and Utah. +
500–1300 m +
Rocky or sandy soils, flats, washes, slopes, rock outcrops, canyon walls, cliff faces, commonly with Larrea, Yucca, Ambrosia +
Flowering Mar–May. +
Amer. J. Bot. +
Amphipappus spinosus +  and Amphipappus fremontii subsp. spinosus +
Amphipappus fremontii var. spinosus +
Amphipappus fremontii +
variety +