Cardamine digitata

Richardson in J. Franklin

in J. Franklin, Narr. Journey Polar Sea, 743. 1823

Synonyms: Cardamine digitata var. oxyphylla Trautvetter Cardamine hyperborea Hultén Cardamine hyperborea var. oxyphylla (Trautvetter) O. E. Schulz Cardamine richardsonii unknown
Treatment appears in FNA Volume 7. Treatment on page 472. Mentioned on page 467.
Perennials; glabrous throughout. Rhizomes cylindrical, slender, 0.5–1.5 mm diam. Stems erect, unbranched, (0.6–)1–2(–3) dm. Rhizomal leaves pinnately 5 or 7-foliolate, (2–)4–10 cm, (not fleshy), leaflets sessile; petiole (1.5–)3–7(–9) cm; lateral leaflets similar to terminal, blade sometimes smaller; terminal leaflet blade linear to narrowly oblong or narrowly lanceolate, (0.5–)1–2.5(–3.3) cm × 0.5–4(–8) mm, base cuneate to attenuate, margins entire. Cauline leaves (1 or) 2 or 3, 5 or 7-foliolate, petiolate, leaflets sessile; petiole (0.2–)0.5–1.2(–1.5) cm, base not auriculate; lateral leaflets similar to terminal, blade smaller; terminal leaflet blade narrowly lanceolate to linear, 1–3.2(–4) cm × 0.8–2.5(–3.5) mm, base cuneate to attenuate, margins entire (apex acute to acuminate). Racemes ebracteate. Fruiting pedicels suberect to divaricate-ascending, (7–)10–25 mm. Flowers: sepals ovate, 2.5–3.5 × 1.5–2.5 mm, lateral pair not saccate basally; petals white, obovate, 5–9 × 2.5–5 mm (clawed, apex rounded); filaments: median pairs 3–4.5 mm, lateral pair 1.5–2.5 mm; anthers oblong, 1–1.5 mm. Fruits linear, (1.5–)2–4 cm × 1.5–2 mm; ovules 6–12 per ovary; style (1–)1.5–2.5(–4) mm. Seeds brown, oblong, 1.8–2.2 × 0.9–1.1 mm. 2n = 28, 42.

Phenology: Flowering Jun–Aug.
Habitat: Damp flats, stream banks, tundra, meadows, bluffs, hummocks, sandy beaches, slopes, mossy mats, sedge swales
Elevation: 0-1400 m


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




Lower Taxa

No lower taxa listed.