Benson10720 Echinocereus nicholii, USA, Arizona, Silver Bell Mts., Pima Co.,
Benson11113 Echinocereus pectinatus, USA, Arizona, Douglas, Cochise Co.,
Benson13637 Echinocereus engelmannii purpureus, USA, Utah, St. George, 884 m, Washington Co., 05.05.1949
Benson14621 Echinocereus fendleri boyce-thompsonii, USA, Arizona, Superior, 730 m, Pinal Co., Superior w 9 mi, Boyce-Thompson Arboretum w 5 mi, Phoenix e 56 mi,
Benson14658 Echinocereus triglochidiatus melanacanthus, USA, New Mexico, Sta. Fe, 2256 m, Santa Fe Co., Sta. Fé se 15 mi,
Benson14694 Echinocereus triglochidiatus melanacanthus, USA, Arizona, Canyon de Chelly, Spire Rock,
Benson14767 Echinocereus engelmannii armatus, USA, California, Victorville, 915 m, San Bernardino Co., Dead Man Point, 01.04.1951
Benson15067 Echinocereus triglochidiatus melanacanthus, USA, Nevada, Joshua Tree Nat. Mon., Lee Canyon - Deer Creek,
Benson15068 Echinocereus triglochidiatus melanacanthus, USA, Nevada, Joshua Tree Nat. Mon., Lee Canyon - Deer Creek,
Benson15069 Echinocereus triglochidiatus melanacanthus, USA, Nevada, Joshua Tree Nat. Mon., Lee Canyon - Deer Creek,
Benson15538 Echinocereus dasyacanthus neomexicanus, USA, Arizona, Artesia, Chaves Co.,
Benson15663 Echinocereus triglochidiatus melanacanthus, USA, California, Cushenberry Canyon, San Bernardino Co.,
Benson15698 Echinocereus triglochidiatus melanacanthus, USA, Utah, Wellington, 1676 m, Carbon Co.,
Benson15700 Echinocereus triglochidiatus melanacanthus, USA, Utah, Sevier Lake, 2134 m, Millard Co., Canyon just W,
Benson16479 Echinocereus pectinatus, USA, Texas, Marathon, Brewster Co.,
Benson16485 Echinocereus viridiflorus correllii, USA, Texas, Marathon, 1200 m, Brewster Co., 04.04.1965
Benson16488 Echinocereus coccineus gurneyi, USA, Texas, Marathon, 1250 m, Brewster Co., 04.04.1965
Benson16491 Echinocereus dasyacanthus neomexicanus, USA, Texas, Ft. Stockton, Pecos Co.,
Benson16504 Echinocereus pectinatus dasyacanthus minor, USA, Texas, Big Bend Nat. Pk., Brewster Co., Tornillo Creek,
Benson16518 Echinocereus pectinatus wenigeri, USA, Texas, Sanderson, Terrell Co.,
Benson16521 Echinocereus pectinatus wenigeri, USA, Texas, Langtry, Val Verde Co.,
Benson16550 Echinocereus reichenbachii albertii, USA, Texas, Alice, Jim Wells Co., 25.05.1965
Benson16563 Echinocereus triglochidiatus melanacanthus, USA, Texas, Fredericksburg, Gillespie Co., Fredericksburg n 4 mi, Balanced rock,
Benson16609 Echinocereus triglochidiatus melanacanthus, USA, Nevada, Antelope Mts., 2134 m, Eureka Co.,
Benson16616 Echinocereus engelmannii acicularis, USA, Arizona, 396 m, Maricopa Co., New River crossing, S side of Black Canyon Refuge,
Benson16633 Echinocereus fasciculatus, USA, Arizona, 945 m, Greenlee/Graham Co., Gila River s nr mouth of Bonanza Creek,