172 Fields number on the database for Ralph Peters

All Agave Ariocarpus Bursera Coryphantha Dudleya Echinocactus Echinocereus Echinomastus Escobaria Ferocactus Glandulicactus Mammillaria Opuntia Pediocactus Peniocereus Sclerocactus Thelocactus Toumeya      

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20 - 40 - 80

Species	Field number	Locality	Picture
Sclerocactus mesae-verdae	RP 23	USA : New Mexico (San Juan County)
Pediocactus simpsonii v. robustior	RP 24	USA : Nevada (Humboldt County)
Sclerocactus wetlandicus v. ilseae	RP 25	USA : Utah (Uintah County)
Sclerocactus nyensis	RP 26	USA : Nevada (Nye County)
Sclerocactus nyensis	RP 27	USA : Nevada (Nye County)
Sclerocactus parviflorus	RP 28	USA : Utah (Duchesne County)
Sclerocactus parviflorus v. contortus	RP 29	USA : Utah (San Juan County)
Echinocereus engelmannii v. chrysocentrus	RP 30	USA : Nevada (Nye Busted, Nye County)
Agave utahensis v. eborispina	RP 31	USA : Nevada (Clark County)
Agave utahensis v. nevadensis	RP 32	USA : Nevada (Clark County)
Escobaria sp. nova	RP 33	USA : Arizona (Navajo County)
Echinomastus johnsonii	RP 34	USA : Nevada (Clark County)
Echinocactus polycephalus	RP 35	USA : Nevada (Clark County)
Sclerocactus parviflorus	RP 36	USA : Colorado (Montezuma County)
Sclerocactus parviflorus	RP 37	USA : Colorado (Montezuma County)
Sclerocactus parviflorus	RP 38	USA : Utah (San Juan County)
Pediocactus sileri	RP 39	USA : Arizona (Mohave County)
Pediocactus simpsonii v. minor	RP 40	USA : Colorado (Jefferson County)
Pediocactus simpsonii	RP 41	USA : Colorado (Mount Princeton, Chaffee County)
Sclerocactus cloveriae v. reevesii	RP 42	USA : New Mexico (San Juan County)
Opuntia pulchella	RP 43	USA : Nevada (Nye County)
Escobaria vivipara v. desertii	RP 44	USA : extreme South Nevada (Clark County)
Echinocereus triglochidiatus v. mojavensis	RP 45	USA : Nevada (Wilson Pass, Clark County)
Escobaria vivipara v. desertii	RP 46	USA : Nevada (Kyle Cyn, Clark County, 4000 feet)
Escobaria vivipara v. desertii-rosea	RP 47	USA : Nevada (Kyle Cyn, Clark County, 6000 feet)
Escobaria vivipara v. rosea	RP 48	USA : Nevada (Kyle Cyn, Clark County, 7000 feet)
Echinocereus coccineus	RP 49	USA : New Mexico (McKinley County)
Toumeya papyracantha	RP 50	USA : Arizona (SE Holbrook, Navajo County)
Sclerocactus whipplei	RP 51	USA : Arizona (Navajo County)
Echinocereus triglochidiatus v. gonacanthus	RP 52	USA : New Mexico (Otero County)
Pediocactus simpsonii	RP 53	USA : Colorado (Montezuma County)
Pediocactus simpsonii	RP 54	USA : Utah (La Sal Mountains, San Juan County)
Sclerocactus mesae-verdae	RP 55	USA : New Mexico (San Juan County)
Sclerocactus parviflorus	RP 56	USA : Utah (San Juan County)
Sclerocactus parviflorus	RP 57	USA : Utah (Grand County, 7000 feet)
Sclerocactus wetlandicus	RP 58	USA : Utah (Uintah County)
Sclerocactus wetlandicus	RP 59	USA : Utah (Uintah County)
Pediocactus simpsonii v. minor	RP 60	USA : Colorado (Monarch Pass, Chaffee County)
Sclerocactus whipplei	RP 61	USA : Arizona (Apache County)
Sclerocactus whipplei	RP 62	USA : Arizona (Navajo County)

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