United States, Arkansas, Washington, Raised from achenes from Dillon 1941 (see collection note). Collection data for Dillon 1941 (at F): Mexico. Baja California Sur: ca. 16 mi. SE of Guerrero Negro. Alkaline flats dominated by Frankia palmeri. Annual herbs to 0.3 m.; rays white with dark stripes, disc yellow. In the greenhouse at Fayetteville. 26 March 1981.
Raised from achenes from Dillon (1941) Chromosome number: n=12. Pollen st. = 98% Reddish line on achene absent. Collection data for Dillon 1941 (at F): Mexico. Baja California Sur: Alkaline flats dominated by Frankia palmeri. Annual herbs to 0.3 M.; rays white with dark stripes, disc yellow.