Pediocactus simpsonii (Engelmann) Britton & Rose ssp.bensonii (Engelmann) Hochstätter

Bensonīs Cactus, Tennisball Cactus

Basionym Echinocactus simpsonii var. minor Engelmann, Trans. Acad. St. Louis, 2:197, 1863.

Synonymy

Pediocactus simpsonii var. minor (Engelmann) Cockerell, Torreya, 18:180, 1916.
Pediocactus simpsonii (Engelmann) var. minor (Cockerell) Boissevain & Davidson, Colorado Cacti, 58, 1940, later homonym.

Pediocactus simpsonii ssp.bensonii is based on the latin diagnosis of Engelmann in Transactions of the Academy of Science of St.Louis, 2:197, 1863, and the following type: Lectotype (Benson, Cact. & Succt. J. (US) 33:51-52, 1961) " Mount Vernon, presumably by Parry, Hall & Harbour, 1862, Missouri Botanical Garden, St.Louis".

Other representative material studied.

Colorado:fh23.0.1, Montrose Co.,
fh 23.0.2, Gore Range, 2,500 m,
fh 27.3.7, Park Co., 2,700m,
fh 27.3.8, Park Co.,
fh 27.4, Hinsdale Co.,
fh 27.4.4, Mesa Co.,
fh 27.4.7, Park Co.,
fh 27.4.8, Park Co.,
fh 27.5.0, Chaffee Co.
Idaho:fh 1.5.
New Mexico:fh 40.1, Rio Arriba Co.,
fh 40.2, Colfax Co.
Wyoming:fh 74, Albany Co.
Utah:fh 65, Limestone Cliffs, 2,500m,
fh 65.1, Wayne Co.,
fh 65.3, Willow Basin, 2,500m,
fh 66, Awapa Plateau, 2,650m,
fh 66.2, San Juan Co., 2,000m,
fh 66.2.0, San Juan Co.,
fh 66.2.2, Wasatch Co.

SPECIES LIST
 Pediocactus simpsonii ssp.bensonii

Pediocactus simpsonii ssp.bensonii, fh 27.5.0, Chaffee Co., Colorado

Pediocactus simpsonii ssp.bensonii

Pediocactus simpsonii ssp.bensonii