Cardamine bellidifolia Linnaeus, Sp. Pl. 2: 654. 1753. TYPE: Herb. Linn. 835.1. (lectotype designated by Khatri (1990a: 442), LINN).

Cardamine bellidifolia var. beringense A. Porsild, Proc. Trans. Roy Soc. Canada 32: 31. 1938. TYPE:

Cardamine bellidifolia var. laxa Lange, Meddel. Gronland 3: 251. 1887. TYPE:

Cardamine bellidifolia var. pachyphylla Coville & Leiberg, Proc. Biol. Soc. Wash. 11: 170. 1897. TYPE:

Cardamine bellidifolia var. pinnatifida Hultén, Madroño 19: 223. 1968. TYPE:

Herbs, perennial, glabrous throughout, somewhat cespitose. Rhizomes and stolons absent; caudex with slender or rarely stout, rhizome-like branches. Stems 0.1–0.8(–1.4) dm, erect to ascending, many, glabrous, subscapose. Basal leaves simple, rosulate, (0.6–)1.2–5(–7) cm; petiole (3–)1–3.5(–5.5) cm; leaf blade ovate to oblong, rarely oblanceolate to obovate, (0.4–)0.8–1.7(–2.5) × (0.2–)5–1(–1.6) cm, base cuneate to obtuse, margin entire or rarely repand or obtusely small toothed, not puberulent, apex obtuse; cauline leaves absent or 1(or 2), simple, short petiolate, base not auriculate, similar in shape and much smaller than basal leaves. Racemes ebracteate; fruiting pedicels ascending to erect, 3–6(–8) mm. Sepals oblong, 2–3(–4) × 0.8–1.5(–2) mm, erect, base of lateral pair not saccate; petals white, oblanceolate, 4–5.5(–7) × 1.3–2(–2.5) mm, not clawed, apex rounded or emarginate; median filament pairs 2.5–4 mm, lateral pair 2–3 mm; anthers oblong, 0.5–0.9 mm. Fruit linear, (0.8–)1.3–2.8(–3.7) cm × 1.3–2 mm; valves glabrous; style 0.5–3 mm; ovules and seeds 8–18 per fruit. Seeds brown, oblong, 1.5–2 × 0.9–1.2 mm. 2n = 16.

Flowering: Jun–Sep.

Habitat: mossy places, tundra, marshes at stream headwaters, cliffs, talus slopes, barren chert slopes, mosit rock crevices, rocky slopes, alpine brooks, sandy beaches, moist rocky stream beds.

Elevation: 0–2300 m.

Distribution: Canada (Alberta, British Columbia, Labrador, Nunavut, Northwest Territories, Quebec, Yukon), Greenland, n Europe, Russia (Siberia, Far East), United States (Alaska, California, Maine, New Hampshire, Oregon, Washington).