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pink oxalis, pink sorrell, windowbox wood-sorrel

ten-leaf wood-sorrel

Habit Herbs perennial, acaulous, rhizomes present, thick, woody, irregularly nodulate-segmented, often covered with persistent petiole bases, stolons absent, bulbs absent. Herbs perennial, acaulous, rhizomes and stolons absent, bulbs solitary or clustered; bulb scales 9–15+-nerved.
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.

basal, rarely absent at flowering;

petiole 7–32(–46) cm;

leaflets (3–)5–11, green to purplish abaxially, green adaxially, sometimes with purplish transverse medial band, narrowly oblong-oblanceolate to narrowly oblong or linear, (10–)12–38(–72) mm, lobed (1/6–)1/2–2/3(–9/10) length, lobes apically subacute, surfaces glabrous, oxalate deposits absent.

Inflorescences

usually umbelliform cymes, less commonly in irregular cymes, 3–12-flowered;

scapes 12–28 cm, sparsely strigose.

umbelliform cymes, (2–)6–11(–15)-flowered;

scapes 7–35 cm, glabrous.

Flowers

heterostylous;

sepal apices with 2 orange tubercles;

petals usually purplish rose to red, rarely white, 10–14 mm.

distylous;

sepal apices with 2 orange, linear, thick tubercles;

petals green proximally, rose purple or lavender to pink, rarely white, distally, with green veins, (7–)9–17(–22) mm.

Capsules

ovoid, 4–8 mm, sparsely strigose.

ellipsoid, 3–11 mm, glabrous.

2n

= 42.

= 28, 56.

Oxalis articulata

Oxalis decaphylla

Phenology Flowering Mar–Jul. Flowering Jun–Aug.
Habitat Disturbed places, especially near gardens, lawns, fields, roadsides. Sycamore-walnut, oak, pine-oak, ponderosa pine, pine-spruce-aspen, or spruce-fir woodlands, canyons, meadows, seeps, streamsides.
Elevation 0–250 m. (0–800 ft.) (1700–)2200–3000(–3200) m. ((5600–)7200–9800(–10500) ft.)
Distribution
from FNA
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]
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; NM; n Mexico; c Mexico
[WildflowerSearch map]
[BONAP county map]
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. 149.
Parent taxa Oxalidaceae > Oxalis Oxalidaceae > Oxalis
Sibling taxa
O. albicans, 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. 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. 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. suksdorfii, O. texana, O. triangularis, O. trilliifolia, O. violacea
Synonyms O. articulata subsp. rubra, O. rubra O. grayi
Name authority Savigny: in J. Lamarck et al., Encycl. 4: 686. (1798) Kunth: in A. von Humboldt et al., Nov. Gen. Sp. 5(fol. & qto.): plate 468. (1822)
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