View in other NatureServe Network Field Guides
Kamchatica Rockcress -
Arabidopsis lyrata ssp. kamchatica
No photos are currently available
If you have a high quality photo of this species, are confident in the identification, and would like to submit it
for inclusion on the Montana Field Guide, please send it to us using our online photo submission tool.
State Rank Reason (see State Rank above)
Known from one 1952 collection near Mount Brown in Glacier National Park.
Lyre-leaf Rockcress is a short-lived perennial with 1 to several simple or branched stems, which are 1-3 dm high and arise from a simple or branched rootcrown. The mostly basal leaves, which are 1-6 cm long, have lobed, broadly lance-shaped blades narrowed to a petiole of equal length. The alternate stem leaves are sessile and few-lobed. Foliage is sparsely covered with long, stiff hairs. 3-20 erect, stalked flowers are borne in a compact inflorescence that expands as the fruits mature. Each flower has 4 glabrous sepals which are ca. 3 mm long, 4 white petals which are 5-8 mm long, 4 long stamens, and 2 short stamens. The glabrous, slightly compressed, linear capsules (siliques) are 2-4 cm long, ca. 1 mm wide, and are held erect.
Flowering and possibly fruiting in May.
The deeply lobed leaves separate this species from all other ARABIS in our area. Species of HALIMOLOBOS are also similar but have either clasping stem leaves or hairy siliques.
Observations in Montana Natural Heritage Program Database
Number of Observations:
(Click on the following maps and charts to see full sized version)
Map Help and Descriptions
(Observations spanning multiple months or years are excluded from time charts)
Along rivers and lakes in damp woods of montane and possibly subalpine zones.
Threats or Limiting Factors
STATE THREAT SCORE REASON Threat impact not assigned because threats are not known (MTNHP Threat Assessment 2021).
Legend: View Online Publication Do you know of a citation we're missing? Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p. Web Search Engines for Articles on "Kamchatica Rockcress"