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Drummond's wood-sorrel

pink oxalis, pink sorrell, windowbox wood-sorrel

Habit Herbs perennial, acaulous, rhizomes and stolons absent, bulb solitary; bulb scales 3-nerved, margins villous-ciliate on distal 1/3–1/2. Herbs perennial, acaulous, rhizomes present, thick, woody, irregularly nodulate-segmented, often covered with persistent petiole bases, stolons absent, bulbs absent.
Leaves

basal;

petiole 5–16 cm;

leaflets 3, green, sometimes with red splotches in irregular medial band adaxially, obtriangular to obcordate, (6–)14–34 mm, lobed 1/4–4/5 length, lobes apically convex to nearly truncate, surfaces glabrous, oxalate deposits absent.

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.

Inflorescences

umbelliform cymes, 3–10-flowered;

scapes (7–)11–23 cm, glabrous.

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

scapes 12–28 cm, sparsely strigose.

Flowers

distylous or rarely homostylous;

sepal apices with 2(–6) orange, linear, thickened, apically confluent tubercles;

petals white to pale green proximally with green veins, pink to violet or purple-violet distally, (8–)15–23 mm.

heterostylous;

sepal apices with 2 orange tubercles;

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

Capsules

cylindric, 4–12 mm, hairy.

ovoid, 4–8 mm, sparsely strigose.

2n

= 14.

= 42.

Oxalis drummondii

Oxalis articulata

Phenology Flowering Mar–Nov. Flowering Mar–Jul.
Habitat Sandy-gravelly soils, limestone soils, disturbed areas, prairies, limestone hills, open woodlands, chaparral. Disturbed places, especially near gardens, lawns, fields, roadsides.
Elevation 20–300 m. (100–1000 ft.) 0–250 m. (0–800 ft.)
Distribution
from FNA
TX; Mexico (Coahuila, Nuevo León, San Luis Potosí, Tamaulipas)
[WildflowerSearch map]
[BONAP county map]
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]
Discussion

Oxalis drummondii is found in the flora area in central and southern Texas. Reports of this species from Arizona, New Mexico, and trans-Pecos Texas are based on misidentifications of O. latifolia and O. metcalfei.

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

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. 149. FNA vol. 12, p. 153.
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. 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. 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
Synonyms O. vespertilionis, O. amplifolia O. articulata subsp. rubra, O. rubra
Name authority A. Gray: Smithsonian Contr. Knowl. 5(6): 25. (1853) Savigny: in J. Lamarck et al., Encycl. 4: 686. (1798)
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