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RM RM 172257 Achyronychia cooperi physical specimen Caryophyllaceae Achyronychia cooperi Torr. and A. Gray 1283 Aven Nelson Ruth A. Nelson 1935 3 26 85 U.S.A. Arizona Pima Yuma Desert: near the U.S.-Mexico border. Loose sand. Phenology: flowering. RM RM 612229 Achyronychia cooperi physical specimen Caryophyllaceae Achyronychia cooperi Torr. and A. Gray 5158 Ronald L. Hartman 1978 5 3 123 U.S.A. Arizona Yuma 8 mi N of Dateland. Common on sandy breaks dominated by Atriplex, Prosopis, and Ambrosia. Phenology: flowering. RM Achyronychia cooperi physical specimen Caryophyllaceae Achyronychia cooperi Torr. and A. Gray 5177 Ronald L. Hartman 1978 5 5 125 U.S.A. California San Bernardino Frontage road 16 mi E of Yermo. Common on sandy desert dominated by Atriplex and Ambrosia. RM RM 288474 Achyronychia cooperi physical specimen Caryophyllaceae Achyronychia cooperi Torr. and A. Gray 25761 C. Leo Hitchcock 1970 3 24 83 U.S.A. Arizona Yuma Ca 7 mi N of Dome. 60 Open sandy desert wash. Phenology: flowering. 3600 3,1,0 true