Vascular Plants - Brassicaceae - Boechera:
Boechera pendulocarpa
Page Author: David Giblin
Holboell's rockcress 
Blooms: May-August
Habit: herb
Duration: biennial,perennial
Origin: Native
Conservation Status: Abundant; of no concern.

Distribution: Chiefly east of the Cascades crest in Washington; Yukon Territory south to California, east to Montana, Wyoming, and Utah.
Habitat: From sagebrush and ponderosa pine slopes to well up in the mountains.
Species Description:

General: Biennial or short-lived perennial from a simple crown, the 1-several stems simple or branched above, glabrous above and variously pubescent below.
Leaves: Basal leaves several, 1-5.5 cm. long and 2-7 mm. wide, linear-oblanceolate to oblanceolate-spatulate, variously pubescent; cauline leaves alternate, many, the upper sessile and auriculate, the lower petiolate, narrowly oblong to lanceolate, 1-5 cm. long and 2-7 mm. wide, mostly pubescent.
Flowers: Inflorescence of 20- to 100-flowered, often compound racemes; pedicels 5-15 mm. long, abruptly bent and reflexed at the base; sepals 4, 2.5-5 mm. long; petals 4, pinkish-purple or often white or pink, 5-10 mm. long; stamens 6; style none.
Fruits: Siliques glabrous, 3-7 cm. long and 1-2 mm. wide, nearly straight, pendant, 1-nerved half their length; seeds in 1 series, 1-1.5 mm. long, with a wing 0.2 mm. broad.
Accepted Name:
Boechera pendulocarpa (A. Nelson) Windham & Al-Shehbaz
Synonyms:
Arabis exilis A. Nelson
Arabis holboellii Hornem. var. pendulocarpa (A. Nelson) Rollins

Treated in Flora of the PNW as:
Arabis holboellii
Additional Resources:

PNW Herbaria Specimens: View list of all Boechera pendulocarpa specimens in the Consortium of Pacific Northwest Herbaria database.

WTU Herbarium Specimens: View list of Boechera pendulocarpa specimens in the WTU Herbarium database.

Washington Flora Checklist: Boechera pendulocarpa treatment.

E-Flora BC: Boechera pendulocarpa atlas page.

CalPhotos: Boechera pendulocarpa images.

USDA Plants Database: Boechera pendulocarpa.
Additional photographs of Boechera pendulocarpa:
(click on a thumbnail to view larger photo)

Bud Kovalchik

Bud Kovalchik

Tim Hagan, 2003

Rod Gilbert, 2007

Rod Gilbert, 2007

Rod Gilbert, 2007

Rod Gilbert, 2007

Ron Bockelman, 2011

Ron Bockelman, 2011

Ron Bockelman, 2011

Ron Bockelman, 2011

Gary Brill, 2014

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Gerald D. Carr, 2016

Craig Althen, 2010

Craig Althen, 2010
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Washington Native Plant Society
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