Pediocactus simpsonii (Engelm.) Britt. & Rose
Annotated by Barbara Ertter.

Idaho: Ada County: [locality and coordinates withheld; status in Idaho: S3 (Rare; IDNHP)],
upper part of steep SE-facing slope overlooking reservoir, fine-grain granite or rhyolite, with bunchgrasses (Pseudoroegnaria, Poa secunda, Achnatherum), scattered shrubs (Purshia), and perennial forbs (Balsamorhiza sagittata, Lupinus arbustus, Phlox aculeata. Eremogone, Antennaria dimorpha, Eriogonum strictum). Colony extending downslope and west of GPS point, mostly on lateral S-facing ridges, on both bare ground and outcrops; stems mostly single, to 11 cm radius, flowers in terminal cluster, magenta. Phenology: Flowers.

Barbara Ertter 21730, May 6, 2014
With Dale Donahue, Kreg Hines, LaMar & Rosalie Orton.
SRP, Accession: 50697