Oxalis articulata |
Oxalis laxa |
|
---|---|---|
pink oxalis, pink sorrell, windowbox wood-sorrel |
dwarf wood-sorrel |
|
Habit | Herbs perennial, acaulous, rhizomes present, thick, woody, irregularly nodulate-segmented, often covered with persistent petiole bases, stolons absent, bulbs absent. | Herbs annual, caulescent, sometimes densely cespitose, rhizomes and 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. |
|
Leaves | basal; petiole 11–30 cm; leaflets 3, green to purplish abaxially, green adaxially, rounded-obcordate, 18–20 mm, margins densely loosely ciliate, lobed 1/5–1/3 length, lobes apically convex, surfaces evenly strigose-villous to strigose-hirsute, oxalate deposits in dots concentrated mostly toward margins or over whole surface. |
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. |
Inflorescences | usually umbelliform cymes, less commonly in irregular cymes, 3–12-flowered; scapes 12–28 cm, sparsely strigose. |
racemes, 6–14-flowered; peduncles 3–15 cm. |
Flowers | heterostylous; sepal apices with 2 orange tubercles; petals usually purplish rose to red, rarely white, 10–14 mm. |
heterostylous; sepal apices without tubercles; petals yellow, 6–12 mm. |
Capsules | ovoid, 4–8 mm, sparsely strigose. |
ovoid to spheric, 3–5 mm, puberulent. |
2n | = 42. |
|
Oxalis articulata |
Oxalis laxa |
|
Phenology | Flowering Mar–Jul. | Flowering Apr–Jun. |
Habitat | Disturbed places, especially near gardens, lawns, fields, roadsides. | Disturbed sites, riparian woodlands, riverbanks, gravelly beaches, rock crevices, foothill woodlands. |
Elevation | 0–250 m. (0–800 ft.) | 10–800 m. (0–2600 ft.) |
Distribution |
AL; AR; CA; FL; GA; LA; MS; NC; OK; OR; SC; TX; VA; South America (Argentina, Brazil, Uruguay) [Introduced in North America; introduced also in Europe, Pacific Islands (New Zealand), Australia]
|
CA; South America (Chile) [Introduced in North America] |
Discussion | Oxalis articulata in the United States commonly has been identified as O. rubra. Oxalis rubra was treated at subspecific rank by A. Lourteig (1982), but subsp. articulata and subsp. rubra have essentially the same native range and occur in similar habitats. Lourteig identified both subspecies in the United States, noting in her key that vestiture is reduced and the sepals are broader in subsp. rubra. Evidence is weak for recognizing more than a single entity. In the Flora of Panama (Lourteig 1980), she recognized only O. articulata, noting that it is naturalized in other parts of America and in the Old World. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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. 153. | FNA vol. 12, p. 145. |
Parent taxa | Oxalidaceae > Oxalis | Oxalidaceae > Oxalis |
Sibling taxa | ||
Synonyms | O. articulata subsp. rubra, O. rubra | O. corniculata var. sericea, O. micrantha, O. radicosa, O. simulans |
Name authority | Savigny: in J. Lamarck et al., Encycl. 4: 686. (1798) | Hooker & Arnott: Bot. Beechey Voy., 13. (1830) |
Web links |