Sclerocactus whipplei (Engelmann) Britton & Rose ssp. busekii Hochstätter

Succulenta, Netherlands, 74e (1):38-44 (3) 1995.

Busek's Cactus

Basionym: Sclerocactus pubispinus (Engelmann) Woodruff & L. Benson var.sileri L.Benson Cacti of Arizona, ed.3, 23, 179, 1969.
Holotype: House Rock Valley, Arizona, fieldnumber, fh 52.1, 27. November 1994 HBG.

Synonymy

Sclerocactus sileri (L. Benson) Heil & Porter Haseltonia, 2, 20-46, 1994. Type: Siler s.n. (F).1888. Southern Utah Ph. Isotype (US).

Other representative material studied.

Arizona:fh 52.1, House Rock Valley, 1,700 m,
fh 52.6, Paria Canyon, 1,600 m,
fh 52.7, Corall Valley, 1,800 m.

SPECIES LIST

Sclerocactus whipplei ssp.busekii, fh 52.1, House Roack Valley, AZ.