Cardamine rupicola
in C. L. Hitchcock et al., Vasc. Pl. Pacif. N.W. 2: 474. 1964.
Perennials; glabrous throughout. Rhizomes cylindrical, slender, 1–2 mm diam. Stems erect or decumbent at base, unbranched, 0.6–2 dm. Rhizomal leaves palmately or subpalmately compound, 3 or 5 (or 7)-foliolate, 5.5–17(–22) cm, (fleshy), petiolate, leaflets petiolulate or subsessile; petiole 4–14(–17) cm; lateral leaflets subsessile, blade similar to terminal, sometimes smaller; terminal leaflet (petiolule 0.1–0.5 cm), blade ovate to lanceolate or elliptic-oblong, 1–3 cm × 6–17 mm, base cuneate or obtuse, margins entire, (apiculate). Cauline leaves 2 or 3, 3 or 5-foliolate, petiolate, leaflets petiolulate or sessile; petiole 0.7–4(–8) cm, base not auriculate; lateral leaflets sessile, blade similar to terminal, smaller; terminal leaflet petiolulate (0.1–0.5 cm), blade elliptic to oblong, or ovate, 1.2–3.5 cm × 4–25 mm, margins entire. Racemes ebracteate. Fruiting pedicels ascending to divaricate, 6–18 mm. Flowers: sepals oblong, 3–5 × 1.5–2 mm, lateral pair saccate basally; petals white, obovate, 8–14 × 4–7 mm, (short-clawed, apex rounded or subemarginate); filaments: median pairs 4–5 mm, lateral pair 2.5–3.5 mm; anthers oblong, 1–1.2 mm. Fruits linear, 2–4 cm × 1.5–2.2 mm; ovules 10–14 per ovary; style 1–5 mm. Seeds brown, oblong, 1.8–2.2 × 1.2–1.5 mm.
Phenology: Flowering Jul–Aug.
Habitat: Limestone talus slopes, loose limey shale, moist banks
Elevation: 2200-2700 m
Discussion
Cardamine rupicola is known from Flathead, Lewis and Clarke, and Missoula counties.
Selected References
None.