Cardamine cordifolia A. Gray, Mem. Amer. Acad. Nat. Sci. (Pl. Fendl.) 4: 8. 1849. TYPE: United States, New Mexico, Santa Fe Co., margin of Santa Fe Creek, 15 May–16 Jun 1847, A. Fendler 28 (holotype, GH!; isotypes, K!, MO!, NY!, PH, UC!).
Cardamine cardiophylla Rydberg, Bull. Torrey Bot. Club 28: 280. 1901, not Greene, Fl. Francisc. 266. 1891; C. cordifolia var. cardiophylla (Rydberg) O. E. Schulz, Bot. Jahrb. Syst. 42: 438. 1903; C. infausta Greene, Pittonia 4: 307. 1901. TYPE: United States, Colorado, Lake Co., Tennessee Pass, 27 Jun 1900, G. E. Osterhout 2178 (holotype, NY!; isotypes, GH!, RM).
Cardamine cordifolia var. diversifolia O. E. Schulz, Bot. Jahrb. Syst. 32: 438. 1903. TYPE: United States, New Mexico, Santa Fe Co., Santa Fe Canyon, 9 miles E of Santa Fe, 8000 ft, 2 Jun 1897, A. A. & E. G. Heller 3647 (holotype, B; isotypes, DS!, MO!, NY!).
Cardamine cordifolia var. incana A. Gray ex M. E. Jones, Proc. Calif. Acad. Sci. II, 5: 620. 1895; C. incana (A. Gray ex M. E. Jones) A. Nelson, Bot. Gaz. 42: 50. 1906. TYPE: United States, Utah, Piute Co., Marysvale, 7000 ft, 1 Jun 1894, M. E. Jones 5341a (holotype, POM; isotype, MO!).
Cardamine cordifolia var. pubescens A. Gray ex O. E. Schulz, Bot. Jahrb. Syst. 32: 439. 1903. TYPE: United States, Utah, Wayne Co., S slope of Thousand Lake Mt., 8000 ft, 14 Jul 1875, L. F. Ward 396 (lectotype designated by Welsh (1982: 162), US!; isolectotype, GH!, NY!).
Cardamine lyallii S. Watson, Proc. Amer. Acad. Arts 22: 466. 1887; C. cordifolia subsp. lyallii (S. Watson) O. E. Schulz, Bot. Jahrb. Syst. 32: 438. 1903; C. cordifolia var. lyallii (S. Watson) A. Nelson & J. F. Macbride, Bot. Gaz. 61: 31. 1916. TYPE: (lectotype should be designated).
Cardamine uintahensis F. J. Hermann, Rhodora 36: 410. 1934. TYPE: United States, Utah, Summit Co., muddy bank of Mill Creek, SW base of Mt. Elizabeth, 6 miles SE of Goodman Ranch, Bear River Valley, 8500 ft, F. J. Hermann 5894 (holotype, GH!).
Herbs, perennial, glabrous or densely puberulent. Rhizomes slender or stout, cylindrical, 1.5–3 mm in diam.; stolons absent. Stems 2–7(–10.2) dm, erect, simple or branched above, glabrous or sparsely to densely puberulent near base or throughout. Rhizomal leaves absent or rarely present, simple, 5–15 cm; petiole 2.5–12 cm; leaf blade reniform to cordate, 1.5–4.5(–6) cm; cauline leaves (3–)5–17(–23), simple or very rarely lowermost 3-foliolate; petiole 1–6.5(–8.5) cm, base not auriculate; leaf blade somewhat fleshy, reniform, deltoid-cordate, or ovate-cordate, (1–)2–7.2(–9.7) × 1–5.5(–8.5) cm, glabrous or sparsely to densely pubescent, base cordate or truncate, margin crenate to slightly sinuate, veins ending in small apicula, puberulent or not. Racemes ebracteate; fruiting pedicels divaricate to ascending, (0.7–)1–2 cm. Sepals oblong, 2.5–4.5 × 1.5–2 mm, erect, base of lateral pair slightly saccate; petals white, broadly obovate, 7–12 × 4–6 mm, with a claw to 6 mm, apex rounded to subtruncate or emarginate; median filament pairs 3.5–5 mm, lateral pair 2–3.5 mm; anthers oblong,1–1.5 mm. Fruit linear, (2–)2.5–3.7(–4) cm × 1.2–2 mm; valves glabrous or sparsely puberulent; style 0.5–3(–6) mm; ovules and seeds 14–24 per fruit. Seeds brown, oblong, 1.6–2 × 1–1.3 mm. 2n = 24.
Flowering: May–Aug.
Habitat: streambanks, springs, shady gullies, creek bottoms, lake shores, ponds, cold springs, meadows, moist hillsides, mossy areas, alpine streams, mixed coniferous forests.
Elevation: 600–3600 m.
Distribution: Canada (British Columbia), United States (Arizona, California, Colorado, Idaho, New Mexico, Nevada, Oregon, Utah, Washington, Wyoming).