[Rockcresses: The Genera Arabis, Boechera and Turritis in the Cascade Mts. of Oregon and Washington]

Howell's Flatseed Rockcress

Boechera howellii

Synonyms: Arabis howellii, Arabis platysperma, Arabis platysperma var. howellii

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Howell's flatseed rockcress forming its erect fruits as seen about 100 meters west of the summit of Lookout Mountain, Badger Creek Wilderness......July 31, 2021. If this isn't Howell's flatseed rockcress, then it is the very similar Coville's rockcress (Boechera covillei)

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Howell's flatseed rockcress forming its mature fruits as seen about 100 meters west of the summit of Lookout Mountain, Badger Creek Wilderness......August 27, 2022.

Howell's flatseed rockcress observed atop Scott Mountain, Mount Washington Wilderness.......July 18, 2023.

Paul Slichter