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RM USFS 473883 Macrosiphonia brachysiphon physical specimen Apocynaceae Macrosiphonia brachysiphon (Torr.) A. Gray S-5 George A. Streitz 1923 7 21 202 U.S.A. Arizona Pima Santa Rita Range Reserve: Pasture 8b. -110.87897 31.84384 9 1219 Gentle southwest slope; gravelly silt loam; with mesquite, mesquitilla, Bouteloua, and Ambrosia. Phenology: vegetative only. RM USFS 473964 Macrosiphonia brachysiphon physical specimen Apocynaceae Macrosiphonia brachysiphon (Torr.) A. Gray 61 Robert Thompson 1921 9 13 256 U.S.A. Arizona Santa Cruz Coronado National Forest. Steep north slope; dry rocky soil; with grama grasses, pine vines, and summer annuals. Phenology: vegetative only. 3600 3,1,0 true