Flora of North America species comparison

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Oxalis suksdorfii

Oxalis oregana

Suksdorf woodsorrel, Suksdorf's oxalis, Suksdorf's wood-sorrel, western yellow oxalis, western yellow wood-sorrel

Oregon oxalis, Oregon wood-sorrel, red wood-sorrel
Habit Herbs perennial, caulescent, rhizomes present long, stolons absent, bulbs absent. Herbs perennial, acaulous, rhizomes present, fleshy-thickened, densely scaly, stolons absent, bulbs absent.
Aerial stems

1(–3) from base, mostly erect, 10–25 cm, herbaceous, sparsely to moderately villous, hairs nonseptate and usually septate.

Leaves

cauline;

stipules rudimentary;

petiole (2–)3–5(–6) cm, hairs septate and nonseptate;

leaflets 3, green, obcordate, (8–)10–16(–20) mm, lobed 1/5–1/3 length, margins green, surfaces glabrous to sparsely strigose, oxalate deposits absent.

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

umbelliform cymes, 1–3-flowered;

peduncles (2–)4–8(–10) cm.

1-flowered;

scapes (6–)11–25 cm, glabrous or sparsely villous.
Flowers

tristylous, above level of leaves;

sepal apices without tubercles;

petals yellow, 12–20 mm.

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

oblong-cylindric, 10–15 mm, densely puberulent.

ovoid, 6–8(–12) mm, glabrate.
2n

= 24.

Oxalis suksdorfii

Oxalis oregana
Phenology Flowering May–Aug. Flowering Feb–Sep.
Habitat Open woods, fir, Douglas fir-oak woodlands, dry shrublands, roadsides, disturbed areas. Douglas fir, mixed fir, cedar-spruce, mixed conifer, and hemlock-maple forests, maple woodlands, alder glens, Gaultheria thickets, stream banks.
Elevation 0–700 m. (0–2300 ft.) 10–800(–1000) m. (0–2600(–3300) ft.)
Distribution
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

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

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 12, p. 145. FNA vol. 12, p. 148.
Parent taxa Oxalidaceae > Oxalis Oxalidaceae > Oxalis
Sibling taxa
O. albicans, O. articulata, O. bowiei, O. brasiliensis, O. caerulea, O. californica, O. colorea, O. corniculata, O. debilis, O. decaphylla, O. dichondrifolia, O. dillenii, O. drummondii, O. florida, O. frutescens, O. grandis, O. hirta, O. hispidula, O. illinoensis, O. incarnata, O. intermedia, O. latifolia, O. laxa, O. macrantha, O. metcalfei, O. montana, O. oregana, O. pes-caprae, O. pilosa, O. purpurea, O. stricta, O. texana, O. triangularis, O. trilliifolia, O. violacea
O. albicans, O. articulata, O. bowiei, O. brasiliensis, O. caerulea, O. californica, O. colorea, O. corniculata, O. debilis, O. decaphylla, O. dichondrifolia, O. dillenii, O. drummondii, O. florida, O. frutescens, O. grandis, O. hirta, O. hispidula, O. illinoensis, O. incarnata, O. intermedia, O. latifolia, O. laxa, O. macrantha, O. metcalfei, O. montana, O. pes-caprae, O. pilosa, O. purpurea, O. stricta, O. suksdorfii, O. texana, O. triangularis, O. trilliifolia, O. violacea
Synonyms Xanthoxalis suksdorfii O. acetosella subsp. oregana, O. oregana var. smalliana, O. oregana var. tracyi, O. smalliana
Name authority Trelease: Mem. Boston Soc. Nat. Hist. 4: 89. (1888) Nuttall: in J. Torrey and A. Gray, Fl. N. Amer. 1: 211. (1838)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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