Page author: Hattie Palmer
Boechera cascadensis
Cascades rockcress

Origin: Native

Conservation Status: Historical in Washington (WANHP)


Long-lived perennials from a slightly woody crown; stems simple from caudex branches, 5-22 cm tall, sparsely pubescent near base with 0.1-0.2 mm simple and short-stalked trichomes, 2-3-rayed, glabrous distally.


Basal leaves narrowly oblanceolate, 0.7-2 mm broad, margins entire, ciliate near base with trichomes to 0.4 mm, densely pubescent above and beneath, short-stalked trichomes to 0.2 mm with 3-6 rays; cauline leaves 4-6, not hiding stem, lobe-like appendages at base 0.5-1 mm, surfaces becoming glabrous towards ends of stems.


Inflorescence 3-11-flowered, unbranched racemes; fruiting pedicels ascending to spreading-ascending, not curved, 3-8 mm, glabrous, not secund; flowers ascending; sepals 4, glabrous or slightly pubescent; petals 4, light purple, 5-6 mm long and 1-1.7 mm broad, glabrous; pollen spheroid.


Siliques 3.5 to 6.2 cm long and 1.2-1.5 mm broad, ascending to spreading-ascending, not appressed to rachis, not curved, with parallel edges; valves glabrous; seeds in 1 series, 1.1-1.3 mm long and 0.9-1 mm broad, with a continuous wing to 0.1 mm broad.

Accepted Name:
Boechera cascadensis Windham & Al-Shehbaz
Publication: Harvard Pap. Bot. 11: 260. 2007. 2007.

Synonyms & Misapplications:
Arabis microphylla Nutt. var. thompsonii Rollins [KZ99]
Additional Resources:

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

WA Flora Checklist: Boechera cascadensis checklist entry.

E-Flora BC: Boechera cascadensis atlas page.

CalPhotos: Boechera cascadensis photos.

USDA Plants: Boechera cascadensis information.

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