Yellowstone draba

Appearance

General: Loosely tufted, scapose perennial, the scapes 1-20 cm. long, often with 1 bract, pubescent with stellate and irregularly branched hairs.
Leaves: Leaves alternate, somewhat imbricate, linear-oblanceolate, 7-13 mm. long and 1.5-3.5 mm. broad, the margins with simple to branched hairs, the under surface pubescent with irregularly branched hairs, with some branched along both sides of the hair stem.
Flowers: Inflorescence racemose; pedicles about equaling the fruit; sepals 4, erect; petals 4, yellow, fading to white, 4-5 mm. long; stamens 6; style 0.4-1 mm. long.
Fruits: Silicles ovate-lanceolate to elliptic, scarcely inflated, 6-10 mm. long and 2.5-3.75 mm. broad, usually pubescent with coarse, short, stiff, simple or branched hairs.

Naming

Draba exalata E. Ekman
Draba incerta Payson var. incerta
Draba incerta Payson var. laevicapsula (Payson) Payson & H. St. John
Draba incerta Payson var. peasei (Fernald) Rollins
Draba laevicapsula Payson
Draba peasei Fernald

Distribution

Occurring in the Cascades and Olympic Mountains in Washington; British Columbia and Alberta south to Washington, east to Montana and Wyoming.

Habitat

Alpine and subalpine slopes.