FNA: Oxalis laxa vs. Oxalis suksdorfii

	Oxalis laxa	Oxalis suksdorfii
	dwarf wood-sorrel	Suksdorf woodsorrel, Suksdorf's oxalis, Suksdorf's wood-sorrel, western yellow oxalis, western yellow wood-sorrel
Habit	Herbs annual, caulescent, sometimes densely cespitose, rhizomes and stolons absent, bulbs absent.	Herbs perennial, caulescent, rhizomes present long, stolons absent, bulbs absent.
Aerial stems	1–5 from base, erect, 0.5–7 cm, usually herbaceous, sometimes becoming ± woody proximally, hirtellous to villous-hirtellous.	1(–3) from base, mostly erect, 10–25 cm, herbaceous, sparsely to moderately villous, hairs nonseptate and usually septate.
Leaves	cauline; stipules rudimentary; petiole 1.5–6 cm; leaflets 3, green, obcordate, 5–12 mm, lobed 1/5 length, lobes apically convex, surfaces glabrous, oxalate deposits absent.	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.
Inflorescences	racemes, 6–14-flowered; peduncles 3–15 cm.	umbelliform cymes, 1–3-flowered; peduncles (2–)4–8(–10) cm.
Flowers	heterostylous; sepal apices without tubercles; petals yellow, 6–12 mm.	tristylous, above level of leaves; sepal apices without tubercles; petals yellow, 12–20 mm.
Capsules	ovoid to spheric, 3–5 mm, puberulent.	oblong-cylindric, 10–15 mm, densely puberulent.
2n		= 24.

	Oxalis laxa	Oxalis suksdorfii
Phenology	Flowering Apr–Jun.	Flowering May–Aug.
Habitat	Disturbed sites, riparian woodlands, riverbanks, gravelly beaches, rock crevices, foothill woodlands.	Open woods, fir, Douglas fir-oak woodlands, dry shrublands, roadsides, disturbed areas.
Elevation	10–800 m. (0–2600 ft.)	0–700 m. (0–2300 ft.)
Distribution	CA; South America (Chile) [Introduced in North America]	CA; OR; WA; BC [WildflowerSearch map] [BONAP county map]
Discussion	Oxalis laxa is widespread in California in the eastern part of the Central Valley and along the central coast. (Discussion copyrighted by Flora of North America; reprinted with permission.)
Source	FNA vol. 12, p. 145.	FNA vol. 12, p. 145.
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. macrantha, O. metcalfei, O. montana, O. oregana, O. pes-caprae, O. pilosa, O. purpurea, O. stricta, O. suksdorfii, 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. oregana, O. pes-caprae, O. pilosa, O. purpurea, O. stricta, O. texana, O. triangularis, O. trilliifolia, O. violacea
Synonyms	O. corniculata var. sericea, O. micrantha, O. radicosa, O. simulans	Xanthoxalis suksdorfii
Name authority	Hooker & Arnott: Bot. Beechey Voy., 13. (1830)	Trelease: Mem. Boston Soc. Nat. Hist. 4: 89. (1888)
Web links	Local floras: CA Local Web sites: CalFlora, CalPhotos WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Oxalis laxa

Oxalis suksdorfii

dwarf wood-sorrel

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

Habit

Herbs annual, caulescent, sometimes densely cespitose, rhizomes and stolons absent, bulbs absent.

Herbs perennial, caulescent, rhizomes present long, stolons absent, bulbs absent.

Aerial stems

1–5 from base, erect, 0.5–7 cm, usually herbaceous, sometimes becoming ± woody proximally, hirtellous to villous-hirtellous.

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

Leaves

cauline;

stipules rudimentary;

petiole 1.5–6 cm;

leaflets 3, green, obcordate, 5–12 mm, lobed 1/5 length, lobes apically convex, surfaces glabrous, oxalate deposits absent.

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.

Inflorescences

racemes, 6–14-flowered;

peduncles 3–15 cm.

umbelliform cymes, 1–3-flowered;

peduncles (2–)4–8(–10) cm.

Flowers

heterostylous;

sepal apices without tubercles;

petals yellow, 6–12 mm.

tristylous, above level of leaves;

sepal apices without tubercles;

petals yellow, 12–20 mm.

Capsules

ovoid to spheric, 3–5 mm, puberulent.

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

= 24.

Oxalis laxa

Oxalis suksdorfii

Phenology

Flowering Apr–Jun.

Flowering May–Aug.

Habitat

Disturbed sites, riparian woodlands, riverbanks, gravelly beaches, rock crevices, foothill woodlands.

Open woods, fir, Douglas fir-oak woodlands, dry shrublands, roadsides, disturbed areas.

Elevation

10–800 m. (0–2600 ft.)

0–700 m. (0–2300 ft.)

Distribution

CA; South America (Chile) [Introduced in North America]

CA; OR; WA; BC

[WildflowerSearch map]

[BONAP county map]

Discussion

Oxalis laxa is widespread in California in the eastern part of the Central Valley and along the central coast.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source

FNA vol. 12, p. 145.

Parent taxa

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. macrantha, O. metcalfei, O. montana, O. oregana, O. pes-caprae, O. pilosa, O. purpurea, O. stricta, O. suksdorfii, 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. oregana, O. pes-caprae, O. pilosa, O. purpurea, O. stricta, O. texana, O. triangularis, O. trilliifolia, O. violacea

Synonyms

O. corniculata var. sericea, O. micrantha, O. radicosa, O. simulans

Xanthoxalis suksdorfii

Name authority

Hooker & Arnott: Bot. Beechey Voy., 13. (1830)

Trelease: Mem. Boston Soc. Nat. Hist. 4: 89. (1888)

Web links

Local floras: CA, OR, WA
Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog.
WildflowerSearch
iNaturalist (observations)
USDA Plants Database
LBJ Wildflower Center
SEINet
Plants of the World Online
Encyclopedia of Life
Wikipedia
Google Image Search

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).

Choose a data source: Flora of North America, OregonFlora, UW Burke Herbarium

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Flora of North America species comparison

Oxalis laxa

Oxalis suksdorfii

Oxalis laxa

Oxalis suksdorfii