Oxalis articulata |
Oxalis incarnata |
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pink oxalis, pink sorrell, windowbox wood-sorrel |
crimson wood-sorrel, pale pink-sorrel |
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Habit | Herbs perennial, acaulous, rhizomes present, thick, woody, irregularly nodulate-segmented, often covered with persistent petiole bases, stolons absent, bulbs absent. | Herbs perennial, caulescent, rhizomes present, 3–8 cm, slender, sometimes producing small tubers, stolons absent, bulblets often present on rhizomes and in leaf axils. |
Aerial stems | mostly 1–4 from base, mostly erect, 5–25 cm, herbaceous, glabrous. |
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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, usually in pseudowhorls of 4–8, sometimes opposite proximally; stipules rudimentary; petiole 2–5(–7) cm; leaflets 3, green, sometimes purplish abaxially, obcordate, 6–10(–15) mm, lobed 1/4 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. |
1-flowered; peduncles 5–7 cm. |
Flowers | heterostylous; sepal apices with 2 orange tubercles; petals usually purplish rose to red, rarely white, 10–14 mm. |
stamen/style arrangement not seen; sepal apices with 2 orange tubercles; petals white to pale pinkish purple with darker veins, 10–20 mm. |
Capsules | ovoid, 4–8 mm, sparsely strigose. |
not seen. |
2n | = 42. |
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Oxalis articulata |
Oxalis incarnata |
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Phenology | Flowering Mar–Jul. | Flowering Jan–May. |
Habitat | Disturbed places, especially near gardens, lawns, fields, roadsides. | Shady, disturbed, generally urban sites, greenhouses, roadsides, yards. |
Elevation | 0–250 m. (0–800 ft.) | 0–200 m. (0–700 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]
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CA; Africa (South Africa) [Introduced in North America; introduced also in Europe, Pacific Islands (New Zealand), Australia]
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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 incarnata is recognized by its rhizomatous habit, small leaves in pseudowhorls, and large, solitary, flowers with white to pink or purple petals. Plants apparently are seed-sterile in California. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 12, p. 153. | FNA vol. 12, p. 146. |
Parent taxa | Oxalidaceae > Oxalis | Oxalidaceae > Oxalis |
Sibling taxa | ||
Synonyms | O. articulata subsp. rubra, O. rubra | |
Name authority | Savigny: in J. Lamarck et al., Encycl. 4: 686. (1798) | Linnaeus: Sp. Pl. 1: 433. (1753) |
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