Oxalis trilliifolia
Fl. Bor.-Amer. 1: 118. 1831. (as trilliifolium)
Common names: Trillium-leaf wood-sorrel
IllustratedEndemic
Synonyms: Hesperoxalis trilliifolia (Hooker) Small
Herbs perennial, acaulous, rhizomes present, fleshy-thickened, densely scaly, stolons absent, bulbs absent. Leaves basal, clustered at rhizome tips; petiole 15–30 cm; leaflets 3, green, broadly obcordate, 20–40(–60) mm, lobed 1/6–1/4 length, lobes apically convex, surfaces sparsely villous, oxalate deposits absent. Inflorescences umbelliform cymes, 2–9(–15)-flowered; scapes 15–25 cm, glabrous or sparsely villous. Flowers heterostylous; sepal apices without tubercles; petals white to pinkish, sometimes greenish proximally, without prominent veins, 8–14 mm. Capsules narrowly fusiform, 15–25(–30) mm, glabrous.
Phenology: Flowering May–Sep.
Habitat: Redwood, spruce-fir, Douglas fir, hemlock, hemlock-cedar, hemlock-alder woodlands, stream margins, swamps.
Elevation: 20–1800 m.
Distribution
Calif., Idaho, Oreg., Wash.
Discussion
Selected References
None.
Lower Taxa
None.