Page author: David Giblin
Phacelia procera
tall scorpion-weed
WTU specimens
Other herbaria

Distribution: Chiefly in the East Cascades Mountains of Washington; south to the northern Sierra and Coast Ranges of California; also in the Blue Mountains of Oregon and adjacent Idaho.

Habitat: Meadows and lightly wooded slopes at moderate elevations in the mountains.

Flowers: June-August

Origin: Native

Conservation Status: Not of concern


Robust perennial from a taproot, the few stems green, 5-20 dm. tall.


Leaves numerous, petiolate, the blade up to 12- cm. long and 7 cm. wide, pinnately few-lobed or cleft; basal leaves wanting, the lowest cauline leaf 1-4 dm. above the stem base, reduced upward.


Inflorescence conspicuously black-glandular, of several helicoid panicles in a loose, flat-topped cluster; calyx divided nearly to the base, lobes 5; corolla bell-shaped, greenish-white, deciduous, 5-7 mm. long and wide; filaments strongly exerted; style elongate, cleft nearly to the middle.


Fruit a capsule, seeds fairly numerous.

Accepted Name:
Phacelia procera A. Gray
Publication: Proceedings of the American Academy of Arts and Sciences 10: 323. 1875.

Synonyms & Misapplications:
(none provided)
Additional Resources:

PNW Herbaria: Specimen records of Phacelia procera in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Phacelia procera checklist entry.

E-Flora BC: Phacelia procera atlas page.

CalPhotos: Phacelia procera photos.

USDA Plants: Phacelia procera information.

38 photographs:
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