Page author: David Giblin
Castilleja tenuis
thin paintbrush

Distribution: Both sides of the Cascades in Washington but more common eastward; British Columbia south to California.

Habitat: Vernally moist meadows and other moist sites, from the lowlands to moderate elevations in the mountains.

Flowers: May-August

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern


Annual, the stem 1-4 dm. tall, usually simple; herbage spreading-hairy throughout, with hairs up to 2 mm. long in the inflorescence.


Leaves alternate, all cauline, 1-4 cm. long, the lower linear and entire, the upper a little wider and 3-5 cleft, the segments narrow.


Inflorescence a terminal spike; bracts gradually differentiated from the leaves, becoming shorter and more cleft, usually green throughout; calyx 2-cleft, with bifid segments; corolla off-white or pale yellow, 12-20 mm. long, exerted, the lower lip inflated and tri-saccate, with inconspicuous teeth; the upper lip straight, 1-2 mm. longer than the lower lip; stamens 4, attached near the top of the corolla tube.



Accepted Name:
Castilleja tenuis (A. Heller) T.I. Chuang & Heckard
Publication: Syst. Bot. 16(4): 658. 1991.

Synonyms & Misapplications:
Orthocarpus hispidus Benth. [HC]
Orthocarpus rarior Suksd.
Orthocarpus tenuis Heller
Triphysaria hispida (Benth.) Rydb.
Additional Resources:

PNW Herbaria: Specimen records of Castilleja tenuis in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Castilleja tenuis checklist entry.

E-Flora BC: Castilleja tenuis atlas page.

CalPhotos: Castilleja tenuis photos.

USDA Plants: Castilleja tenuis information.

47 photographs:
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