Oxalis articulata |
Oxalis grandis |
|
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pink oxalis, pink sorrell, windowbox wood-sorrel |
great yellow wood-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, without tubers or tuberlike thickenings, stolons absent, bulbs absent. |
Aerial stems | 1(–3) from base, erect, (10–)25–60(–100) cm, herbaceous, glabrate to sparsely or densely pilose or villous, hairs ± straight, spreading, septate and nonseptate. |
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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, mostly on distal 1/2 of stem; stipules apparently absent; petiole 5–7.5 cm, hairs septate and nonseptate; leaflets 3, green, obcordate, 5–25(–30) mm, lobed 1/5 length, lobes apically usually rounded, rarely ± truncate, margins green or brownish purple, ciliate, surfaces glabrous, oxalate deposits absent. |
Inflorescences | usually umbelliform cymes, less commonly in irregular cymes, 3–12-flowered; scapes 12–28 cm, sparsely strigose. |
regular, irregular, or umbelliform cymes, 1–4(–8)-flowered; peduncles 7–12 cm. |
Flowers | heterostylous; sepal apices with 2 orange tubercles; petals usually purplish rose to red, rarely white, 10–14 mm. |
tristylous, above level of leaves; sepal apices without tubercles; petals yellow, with or without faint red lines proximally, 10–14 mm. |
Capsules | ovoid, 4–8 mm, sparsely strigose. |
ovoid to ovoid-oblong, 6–10 mm, sparsely puberulent. |
Seeds | brown, transverse ridges brown. |
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2n | = 42. |
= 28. |
Oxalis articulata |
Oxalis grandis |
|
Phenology | Flowering Mar–Jul. | Flowering May–Aug. |
Habitat | Disturbed places, especially near gardens, lawns, fields, roadsides. | Sandy woods, alluvial soils. |
Elevation | 0–250 m. (0–800 ft.) | 100–1100 m. (300–3600 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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AL; DC; GA; IN; KY; MD; NC; OH; PA; SC; TN; VA; WV
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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.) |
|
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. recurva, Xanthoxalis grandis |
Name authority | Savigny: in J. Lamarck et al., Encycl. 4: 686. (1798) | Small: Bull. Torrey Bot. Club 21: 475. (1894) |
Web links |