Cardamine microphylla

Perennials; usually glabrous, rarely sparsely hirtellous. Rhizomes cylindrical, slender, 0.7–1.5 mm diam. Stems erect or ascending, unbranched, 0.3–1.5(–2) dm. Rhizomal leaves pinnately 5 or 7-foliolate, (1.3–)2.5–6.5 cm, (not fleshy), leaflets petiolulate; petiole (0.5–)1.5–5.5 cm; lateral leaflets similar to terminal, blade sometimes smaller; terminal leaflet (petiolule 0.15–0.7 cm), blade ovate to elliptic, (0.2–)0.4–1.2(–1.5) cm × (1–)2.5–6 mm, base cuneate to obtuse, margins entire, (apiculate). Cauline leaves 1–3, 5 or 7-foliolate, petiolate, leaflets petiolulate or subsessile; petiole 0.2–1.5 cm, base not auriculate; lateral leaflets similar to terminal; terminal leaflet (subsessile or petiolule to 0.2 cm), blade ovate to elliptic, 0.6–1.3 × 0.1–0.7 cm, base cuneate, margins entire. Racemes ebracteate. Fruiting pedicels erect to ascending, 7–15(–25) mm. Flowers: sepals ovate to oblong, 3–4 × 1.8–2.5 mm, lateral pair slightly saccate basally; petals usually white, rarely lavender, broadly obovate, 7–10 × 3–6 mm, (clawed, apex rounded); filaments: median pairs 3–4.5 mm, lateral pair 2–3 mm; anthers oblong, 1–1.5 mm. Fruits linear, 2–3 cm × 1.2–1.7 mm; ovules 12–16 per ovary; style 1–2 mm. Seeds brown, oblong, ca. 1.5 × 1 mm. 2n = 28, 42, 64.

Phenology: Flowering Jul–Aug.
Habitat: Streamsides, sand and cobbles on gravel bars, shale banks, floodplains, alluvial sand between cobbles, moist moss, turf, seepage areas, meadows, wet grounds
Elevation: 0-1600 m

N.W.T., Yukon, Alaska, e Asia (Russian Far East, Siberia).

Discussion

Selected References

None.

Lower Taxa