Physaria acutifolia Rydb. var. acutifolia
[= Physaria acutifolia]
Annotated by Charles F. Williams, 2 Dec 2020. Sources: FPNW, 2nd edition. Remarks: Physaria acutifolia in Intermountain Flora.

Idaho: Bonneville County: Caribou National Forest: south side of ridgeline 450 meters west of summit of Old Baldy Peak. Elev. 2405 m.
43.120193° N, 111.222408° W
Datum: WGS 84. Uncertainty: 5 meters. Coordinate Source: GPS.
Steep, barren, south facing slope just below ridgeline, formed by layers of calcareous rock eroding to soft clay soil, with Stenotus lanuginosus, Eriogonum brevicaule, Chaenactis douglasii. Petals yellow; fruits strongly inflated, outer surfaces smoothly rounded, hairs stellate, appressed; leaves entire; plants locally common on bare slope. Photographed. (Legler) Robust plants, cespitose from a taproot, basal leaves obovate/oblanceolate tapering to long petiole, cauline leaves sessile oblanceolate/spatulate; silicles large (~10mm) inflated, cleft above and below, style ~6mm herbage and fruits densely covered in sessile, many rayed stellate hairs, hairs fused ~ 1/4-1/3 from base. Williams. Phenology: Flowers & Fruits.

Ben Legler 15797, Jun 27, 2020
With Beth Corbin, Samantha Seabrook-Sturgis, Cara Hastings, Daniel Botello
IDS, Accession: 2021.004, Barcode: IDS0076080