Pediocactus sileri (Engelmann) L. Benson

Cact. & Succt. J. (US) 33:53, 1961.

Gypsum Cactus

Type: collected in May 1883 by Siler, MO (2 sheets); photograph, ny.

Synonymy

Echinocactus sileri Engelmann in Coulter, Contr. U.S. Herb.3:376, 1896.
Utahia sileri (Engelmann) Britton & Rose, Cactaceae, 3:215, 1922.

Other representative material studied.

Arizona:fh 0200, near Pipe Springs, 1,500m,
fh 0201, Fredonia,
fh 0202, w Fredonia,
fh 0202.0, Kanab Creek,
fh 0202.1, Arizona/Utah border area,
fh 0204, Sand Wash.
Utah:fh 0203, Washington Co., 900m,
fh 0205, St. George area, 950m,
fh 0206, Hurricane, 1,000m,
fh 0206.1, Fort Pearce Wash, 800m.

SPECIES LIST
 Pediocactus sileri

Pediocactus sileri, fh 0200, near Pipe Springs, 1,500m.