Oxalis oregana

Nuttall in J. Torrey and A. Gray
Fl. N. Amer. 1: 211. 1838.
Common names: Redwood-sorrel
IllustratedEndemic
Synonyms: Oxalis acetosella subsp. oregana (Nuttall) D. Löve O. oregana var. smalliana (R. Knuth) M. Peck O. oregana var. tracyi Jepson O. smalliana R. Knuth
Treatment appears in FNA Volume 12. Treatment on page 148. Mentioned on page 135, 147.

Herbs perennial, acaulous, rhizomes present, fleshy-thickened, densely scaly, stolons absent, bulbs absent. Leaves basal, clustered at rhizome tips; petiole 5–15(–21) cm, sparsely to densely villous, hairs rusty; leaflets 3, green, broadly obcordate, 10–30(–40) mm, lobed 1/5–1/4 length, lobes apically convex, surfaces sparsely villous, oxalate deposits absent. Inflorescences 1-flowered; scapes (6–)11–25 cm, glabrous or sparsely villous. Flowers heterostylous; sepal apices without tubercles; petals white to deep pink, usually with yellow spot sub-basally and prominent purple veins, (8–)15–25 mm. Capsules ovoid, 6–8(–12) mm, glabrate.


Phenology: Flowering Feb–Sep.
Habitat: Douglas fir, mixed fir, cedar-spruce, mixed conifer, and hemlock-maple forests, maple woodlands, alder glens, Gaultheria thickets, stream banks.
Elevation: 10–800(–1000) m.

Distribution

V12 682-distribution-map.jpg

B.C., Calif., Oreg., Wash.

Discussion

Oxalis oregana has sometimes been treated as a disjunct geographical taxon of the European O. acetosella Linnaeus (see comments under 21. O. montana).

Selected References

None.

Lower Taxa

None.

... more about "Oxalis oregana"
Guy L. Nesom +
Nuttall in J. Torrey and A. Gray +
Redwood-sorrel +
B.C. +, Calif. +, Oreg. +  and Wash. +
10–800(–1000) m. +
Douglas fir, mixed fir, cedar-spruce, mixed conifer, and hemlock-maple forests, maple woodlands, alder glens, Gaultheria thickets, stream banks. +
Flowering Feb–Sep. +
Fl. N. Amer. +
Illustrated +  and Endemic +
Oxalis acetosella subsp. oregana +, O. oregana var. smalliana +, O. oregana var. tracyi +  and O. smalliana +
Oxalis oregana +
species +