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Oxalis stricta  L.
Riley County, Kansas
Usually perennial, sometimes annual
Height: 8-20 inches
Family: Oxalicaceae - Oxalis Family
Flowering Period:   May, June, July, August, September,October
Stems: Prostrate to erect, usually unbranched or with few branches, with spreading, partitioned hairs and appressed, non-partitioned hairs.
Leaves: Basal and cauline, alternate; stipules usually absent, sometimes present and small; petiole with spreading, partitioned hairs and appressed, non-partitioned hairs; blades palmately 3-foliolate; leaflets obcordate, 1/3 to 1 inch long, 3/5 to 1 1/5 inch wide, margins entire.
Inflorescences: Cymes, (3-)5-7(-15)-flowered; peduncles 1 to 4 inches long. Pedicels spreading to ascending in fruit.
Flowers: Sepals 5, persistent in fruit, lanceolate or oblong, 1/8 to 1/6 inch, glabrous with few appressed, non-partitioned hairs proximally, tips green; petals 5, yellow, 1/4 to 2/5 inch, slightly connate at bases; stamens 10, 5 short alternating with 5 long; styles 5; stigmas 5.
Fruits: Capsules, erect or spreading, columnar, 1/3 to 3/5 inch, nearly bald or sparsely shaggy with partitioned hairs, apex abruptly tapered; seeds brown, transversely ridged, ridges brown, rarely white.
Habitat: Open woods, flood plains, stream banks, prairie ravines, pastures, lawns, gardens, and waste places.
Distribution: East 2/3 of Kansas
Origin: Native
Uses: The Iroquois took an infusion of the plant for fever, cramps, and nausea and the Kiowa chewed the leaves to relieve thirst.
Comments: Oxalis, acid and with the nature of, alluding to the sour juice of plants and stricta, erect. The leaves of Oxalis stricta are larger than the leaves of Oxalis dillenii.

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