Pleurophragma lilacinum (Greene) Rydberg; Thelypodium lilacinum Greene; T. lilacinum var. subumbellatum Payson

Racemes elongated or sub-umbellate in fruit; central rachis (0.5-)1.2-10(-25) cm. Fruiting pedicels usually divaricate to divaricate-ascending, rarely horizontal, straight or slightly incurved, not whitish, often slender, sometimes stout, (4-)6-10(-13) mm, not or slightly flattened at base. Flowers: petals usually lavender to purple, rarely white, (4.5-)5.5-8(-10.5) mm; gynophore stout, 0.5-1.2(-2.5). Fruits divaricate-ascending to ascending, straight or incurved, (1-)1.5-3(-4) cm. 2n = 26.

Flowering Jun-Sep. Alkaline grounds and flats, desert shrub communities, barren hillsides, mineralized grounds near hot springs; 600-2500 m; Colo., Idaho, Mont., Nebr., N.Dak., Oreg., S.Dak., Utah, Wash., Wyo.