[Rockcresses: The Genera Arabis, Boechera and Turritis in Mt. Adams Country]
Eschscholtz's Hairy Rockcress, Hairy Rockcress, Mountain Rockcress
Arabis eschscholtziana
Synonyms: Arabis hirsuta var. eschscholtziana, Arabis hirsuta var. glabrata, Arabis hirsuta
The photo above shows a close-up photo of the flowers of hairy
rock cress. The racemes are congested at first, but elongate as the fruits begin
to form. The white, cream or slightly pink petals measure 4-9 mm long. Photographed
along the north loop road below Fish Lake on the Steens Mt., southeastern Oregon..........June
21, 2004.
The photo above shows a close-up of the lower
leaves of hairy rock cress. The lower leaves form what appears to be a loose
basal cluster of oblanceolate to obovate-spatulate leaves with the blades tapering
gradually to a winged petiole. The upper surface of the blade ranges from glabrous
to sparsely covered with spreading hairs. Note also the lower stem covered with
numerous spreading hairs at the lower right corner of the photo. As seen below,
the hairs on the stem soon disappear, so that the upper stem is glabrous.
The photo above shows the stem leaves of hairy rock cress. The
blades are green rather than glaucous and largely sessile. They may also be
somewhat auriculate at the base. The blades have entire margins, and may be
ringed with spreading hairs.
Paul Slichter