Oxalis articulata
Oxalis latifolia
pink oxalis, pink sorrell, windowbox wood-sorrel
broad-leaf wood-sorrel, Mexican oxalis
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;
petiole (6–)10–25 cm;
leaflets 3, green, obtriangular to obcordate, (15–)25–40 mm, lobed 1/5–1/2 length, lobes apically rounded, surfaces glabrous, oxalate deposits absent.
usually umbelliform cymes, less commonly in irregular cymes, 3–12-flowered;
scapes 12–28 cm, sparsely strigose.
umbelliform cymes, (3–)6–10(–12)-flowered;
scapes (7–)10–20(–30) cm, glabrous.
heterostylous;
sepal apices with 2 orange tubercles;
petals usually purplish rose to red, rarely white, 10–14 mm.
usually tristylous, rarely homostylous;
sepal apices with 2 orange, short to elongate, not confluent tubercles;
petals white to pale green proximally with green veins, purple to lavender or pink distally, 9–12 mm.
ovoid, 4–8 mm, sparsely strigose.
cylindric, 4–6 mm, glabrous.
= 42.
= 14, 28, 42.
Oxalis articulata
Oxalis latifolia
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.)
Collections of Oxalis latifolia from trans-Pecos Texas and eastern New Mexico were mostly identified by M. F. Denton (1973) as O. alpina and O. drummondii. Oxalis latifolia in the narrow sense (type from Campeche, Mexico), with somewhat angular leaflets, occurs in Mexico as far north as Veracruz, San Luis Potosí, and Tamaulipas. The northern populations tend to have more rounded leaflets and perhaps may be better identified by a different name, but they are neither O. alpina (with bulblet clusters) nor O. drummondii (with three-nerved bulb scales).
M. F. Denton (1973) observed that Oxalis latifolia probably consists of several races and perhaps hybrids with other species. A. Lourteig (2000) recognized four subspecies of O. latifolia. Her concept of subsp. latifolia restricted it to South America and the West Indies (even though the type was collected in Mexico); subsp. schraderiana (Kunth) Lourteig is entirely South American; and subsp. vespertilionis (Zuccarini) Lourteig occurs in montane Mexico south to Guatemala. She recognized subsp. galeottii (Turczaninow) Lourteig as occurring from Mexico into the United States. In contrast, most others have treated O. galeottii Turczaninow as a distinct species of central and southern Mexico, broadly sympatric with O. latifolia.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
OR
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Flora NW
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