Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to central Oregon, east to western Montana.
Habitat: Open, moist or rather dry places, from the valleys and plains to moderate elevtions in the mountains.
Flowers: May-August
Origin: Native
Growth Duration: Annual
Conservation Status: Not of concern
Pollination: Bumblebees, bees, flies, moths
Slender annual, the stem 1-3 dm. tall, simple or branched above; herbage puberulent.
Leaves alternate, all cauline, 1-5 cm. long, the lower narrowly linear and entire, the others with 1 or 2 pairs of slender lobes; bracts abruptly differentiated from the leaves, much broader and blunter, entire, or the lower with a pair of slender lateral lobes; the upper bracts have conspicuous, purplish-pink tips.
Inflorescence a dense, showy spike; calyx 2-cleft, with bifid segments; corolla yellow, purplish at the tip, 14-20 mm. long, bilabiate, the lower lip inflated, with 3 short teeth; upper lip hooded, enclosing the 4 stamens, about 1 mm. longer than the lower lip, hooked at the tip.
Capsule.
PNW Herbaria: Specimen records of Orthocarpus tenuifolius in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Orthocarpus tenuifolius checklist entry
OregonFlora: Orthocarpus tenuifolius information
E-Flora BC: Orthocarpus tenuifolius atlas page
CalPhotos: Orthocarpus tenuifolius photos