General: Annual or biennial (var. oligosperma) or perennial (var. kamtschatica) herb from a taproot; stems erect to ascending, one or more, freely branched, 10-50 cm tall, hairs short or lacking.
Leaves: Basal leaves forming a rosette; stem leaves similar, pinnate, sparsely stiff-hairy to hairy-fringed to almost glabrous, lateral lobes (2) 3-10, shortly-stalked to stalked, oblanceolate to egg-shaped, entire or shallowly 2 to several times round-toothed or lobed, 3-20 mm long, the terminal leaflet usually larger, to 3 cm long.
Flowers: Inflorescence an elongate racemes, more or less umbel-like, 3-10 cm long, generally lacking bracts; flower stalks erect to ascending, 5-20 mm long; petals white, 2-4 mm long; sepals 1-2 mm long.
Fruits: Siliques, erect, 1.5-2.5 cm long, 1-1.5 mm wide, glabrous to sparsely hairy; styles less than 0.5 mm long; seeds 15-22 (24), 1.5-2 mm long, oblong-oval, narrowly wing-margined.
Notes: Two rather weak varieties occur in BC.
1. Racemes more or less umbel-like, the central axis 1-2 cm long; plants of the upper montane to alpine zones...................... var. kamtschatica (Regel) Detling
1. Racemes more elongate, the central axis greater than 3 cm long; plants of the lowland and lower montane zones............................ var. oligosperma
Wet to mesic streamsides, ditches, waste places, roadsides, meadows, gravelly slopes and open woods in the lowland to alpine zones; var. oligosperma - common in S BC, less frequent northward, var. kamtschatica - frequent in coastal and N BC; var. oligosperma - S to MT and CA, var. kamtschatica - amphiberingian, N to AK, YT and NT, E to AB and S to OR; E. Asia.
Recommended citation: Author, Date. Page title. In Klinkenberg, Brian. (Editor) 2020. E-Flora BC:
Electronic Atlas of the Plants of British Columbia [eflora.bc.ca]. Lab for
Advanced Spatial Analysis, Department of Geography, University of British
Columbia, Vancouver. [Accessed:
2021-03-05 6:21:13 PM
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