Page authors: Don Knoke, David Giblin
Boechera lyallii
Lyall's rockcress, murry's rockcress

Distribution: Widely distributed in the mountains throughout Washington; British Columbia to California, east to the Rocky Mountains.

Habitat: Subalpine to alpine ridges, cliffs, and drier meadows.

Flowers: June-August

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Tufted perennial from a well-branched crown, the several stems erect, 1-2.5 dm. tall, glabrous throughout or pubescent at the base.


Basal leaves numerous, bright green, rather fleshy, 1.5-3 cm. long and 1.5-5 mm. broad, the blades elliptic-oblanceolate, acute, entire, narrowed to slender petioles, glabrous to copiously hairy on the lower surface with hairs branched in a tree-like fashion; cauline leaves alternate, several sessile and auriculate, oblong-ovate to narrowly oblong, 10-20 mm. long and 2.5 mm. wide, usually glabrous.


Inflorescence of 3- to 15-flowered racemes; pedicles 5-10 mm. long; sepals 4, mostly glabrous, often purplish, 3-4 mm. long; petals 4, purple, 6-10 mm. long; stamens 6; style 0.5 mm. long.


Siliques glabrous, 1-nerved full length, 2-6 cm. long and 2-3 mm. wide, straight or curved, erect or spreading; seeds in 1 series, 2 mm. long, with a wing up to 0.5 mm. broad.

Accepted Name:
Boechera lyallii (S. Watson) Dorn
Publication: Vasc. Pl. Wyoming ed. 3. 376. 2001.

Synonyms & Misapplications:
Arabis lyallii S. Watson [HC]
Arabis lyallii S. Watson var. lyallii [KZ99]
Arabis murrayi G.A. Mulligan
Additional Resources:

PNW Herbaria: Specimen records of Boechera lyallii in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Boechera lyallii checklist entry.

E-Flora BC: Boechera lyallii atlas page.

CalPhotos: Boechera lyallii photos.

USDA Plants: Boechera lyallii information.

42 photographs:
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