Plant: perennial herb; stems prostrate or decumbent, to 30 cm long, often rooting at nodes Leaves: cauline; leaflets 3, to 2 cm long, often maroon INFLORESCENCE: 2-5-flowered; pedicels less than 1 cm long Flowers: perfect, the petals clawed, connate at base; stamens 10; pistil 5-carpelled; styles 5, corollas yellow, 4-8 mm long Fruit: FRUITS fleshy explosive capsules, cylindric, angled, 6-25 mm long. SEEDS 1.2-1.5 mm long, arillate Misc: Common in lawns, gardens, disturbed places, greenhouses, and occasionally woodlands or grasslands:; 250-1300 m (1100-3900 ft); flowers all year REFERENCES: Denton, Melinda. 1998 Oxalidaceae. J. Ariz. - Nev. Acad. Sci. 30(2): 115.
From Flora of Indiana (1940) by Charles C. Deam
A weed introduced into greenhouses throughout the state. It has not often been collected, however, and the only specimen is in the herbarium of the University of Notre Dame, having been collected at Notre Dame.
Wiggins 1964, Ornduff and Denton 1998
Duration: Perennial Nativity: Native Lifeform: Forb/Herb General: Delicate perennial, fleshy taproot, creeping stems that root at nodes, less than 30 cm long, more or less hairy. Leaves: Cauline, petiole less than 7 cm, leaflets less than 2 cm, often maroon. Flowers: Cyme, 2-5 flowered, pedicel less than 1 cm; sepals less than 4.5 mm, petals less than 8 mm, yellow. Fruits: Explosively dehiscent capsule, cylindric, 6-25 mm. Ecology: Found in disturbed spaces, occasionally in grasslands or woodlands from 1,000-4,000 ft (305-1219 m), flowers throughout the year. Notes: Naturalized weed usually found in disturbed areas. Ethnobotany: Taken as an infusion for hookworms, to stop vomiting, as a blood medicine, for mouth aid, sore throat, and as a food. Etymology: Oxalis is from Greek oxys for sharp, sour, and corniculata means horned. Synonyms: Oxalis albicans, others see Tropicos Editor: SBuckley, 2010
Much like no. 2 [Oxalis dillenii Jacq.]; stems trailing and freely rooting; pubescence variously oriented; herbage tending to have a purplish cast; infl cymose when well developed, the mature pedicels erect or ascending; pubescence of the fr mostly short and spreading, sometimes with intermingled longer hairs; seeds wholly brown; 2n=24, 42, 48. A widely distributed weed in the tropics and abundant in s. U.S., in our range often a weed in greenhouses and occasional in gardens. (O. repens; Xanthoxalis c.)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.