Cymopterus ibapensis M.E. Jones
Annotated by R. Moseley, 1984. Remarks: Fide Ron Hartman (RM) 1983

Idaho: Custer County: Crest of Lost River Range, just S of Mt. Borah region, Challis National Forest. E ridge of Peak 11,899, just W of Leatherman Pass. Elev. 11000 ft.
T9N R23E S28 NW
Datum: NAD 27. Uncertainty: 800 meters. Coordinate Source: TRS2LL.
Gravelly bench, substrate quartzite. With Ranunculus eschscholtzii, Erigeron humilis, Arenaria obtusiloba, Festuca ovina, and Poa rupicola. Flowers white. This white-flowered form fairly common in the Mt. Borah region at higher elevations but has been restricted to limestone substrates. Although the indicated parent material is quartzite, this is an area very close to the contact with calc substrates (Leatherman Pass), and small, partially buried outcrops are not uncommon within the quartzite in this area. Phenology: Fruits.

D. Henderson 5457, Jul 27, 1979
ID, Accession: 76713, Barcode: ID127229