[Rockcresses: The Genus Arabis (and Boechera) East of the Cascade Mountains of Oregon and Washington]

Hoary Rockcress

Boechera puberula

Synonym: Arabis puberula

Stem leaves of Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula) - Inflorescence of Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula) - Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula)

Hoary rockcress blooming (growing with purple sickle rockcress, Boechera atrorubens) atop Bickleton Ridge in the Bickleton Ridge Unit of the Klickitat Wildlife Area.........May 7, 2017. Note the gray leaves which are crowded together and overlapping, and their coarsely toothed margins. Contrast these plants with the plants from the Steens Mt. below..

Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula) - Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula)

Hoary rockcress as seen in loose gravelly soils on the steep slope along the Wildhorse Lake Trail about one quarter mile downhill from the trailhead 'registry' box, Steens Mountain Recreation Area..........July 10, 2014. Note the light gray basal and stem leaves as well as the butterfly larva on the plant at left.

Flower of Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula)

The photo above shows the inflorescence of hoary rockcress as seen at the summit of Domingo Pass in the Pueblo Mts. of southeastern Oregon.......June 19, 2004.

Maturing fruits of Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula)
The photo above shows the fruits of hoary rockcress. The pedicels generally protrude from the stem at a perpendicular angle then bend sharply downward. Photographed at Domingo Pass in the Pueblo Mts. of southeastern Oregon........June 19, 2004.

Mid stem leaves of Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula)

The photo above shows the numerous, closely overlapping stem leaves of hoary rockcress. Photographed at Domingo Pass in the Pueblo Mts. of southeastern Oregon.........June 19, 2004.

Lower stem leaves of Hoary Rockcress: Boechera puberula (Synonym: Arabis puberula)

The photo above shows the numerous stem leaves at the base of hoary roccress' stem. The lower-most leaves seem to be drying up on this specimen as the plant begins to bloom. Photographed at Domingo Pass in the Pueblo Mts. of southeastern Oregon.........June 19, 2004.

Paul Slichter