Herbs perennial, dioecious. Rhizomes horizontal, ligneous. Stems usually numerous from rhizome, erect or ascending, 15-35(-45) cm tall, slender, finely grooved, branched above middle. Basal leaves hastate, rarely without basal leaves, 2-4 cm × 3-6(-10) mm, glabrous, central lobe ovate-lanceolate, lanceolate, or linear, basal lobes spreading or curved, sometimes multifid, margin above basal lobes entire, apex acute or obtuse; cauline leaves smaller upward. Petiole short or in upper cauline leaves nearly absent; ocrea fugacious, white, membranous. Inflorescence terminal, paniculate. Flowers unisexual. Pedicel 2-2.5 mm, articulate near base of tepals. Male flower: outer tepals small; inner tepals elliptic, ca. 1.5 mm. Female flower: outer tepals lanceolate, ca. 1 mm, not reflexed in fruit; inner tepals slightly enlarged in fruit; valves ovate, 1-1.6 mm, without tubercles, net veined, base rounded to broadly cuneate, margin entire, apex acute. Achenes brown, shiny, broadly ovoid, trigonous, 1-1.5 mm. Fl. Jun-Jul, fr. Jul-Aug. 2n = 14, 42.
Plants perennial, glabrous, with vertical rootstock and/or creeping rhizomes. Stems erect or ascend-ing, several from base, branched in distal 1/ 2 (in inflorescence), 10-40(-45) cm; shoots variable. Leaves: ocrea brownish at base, silvery and lacerated in distal 1/ 2; blade normally obovate-oblong, ovate-lanceolate, lanceolate-elliptic, or lanceolate, occasionally, linear-lanceolate to almost linear, 2-6 × 0.3-2 cm, base hastate (with spreading, entire or sometimes multifid, dissected lobes), occasionally without evident lobes, then base broadly cuneate, margins entire, flat or nearly so, apex acute or obtuse. Inflorescences terminal, usually occupying distal 2- 3 of stem, usually lax and interrupted to top, broadly or narrowly paniculate. Pedicels 1-3 mm. Flowers (3-)5-8(-10) in whorls; inner tepals not or slightly enlarged, normally 1.2-1.7(-2) × 0.5-1.3 mm (free wing absent or barely visible), base cuneate, apex obtuse or subacute. Achenes brown or dark brown, 0.9-1.5 × 0.6-0.9 mm. 2n = 14, 28, 42.
Low delicate glabrous perennials with slender creeping rootstocks. Leaves glabrous, lanceolate-hastate, apically acute to rounded, 1-3 cm. long, 3-8 mm. broad; petioles 1-5 cm. long; ochreae mostly 0.5-1 cm. long, tardily deciduous. Inflorescences of panicles of remote few-flowered verticils. Flowers dioecious, on pedicels mostly less than 3 mm. long; outer tepals oblong to narrowly ovate, about 0.5 mm. long, scarcely accrescent; inner tepals broadly ovate, about 1 mm. long, scarcely accrescent, not tuberculate; stamens 6 discrete, the filaments less than 0.3 mm. long, the anthers 0.5-1 mm. long, bilocular and loculicidal; ovary trigonous, the 3 styles spreading, with 3 peltate fimbrillate stigmata. Achene triquetrous, brown, dull and rough, often slightly exserted, about 1 mm. long.
"Dioecious perennial 1–4 dm from slender creeping roots; lvs variable, usually 3-lobed, the terminal lobe narrowly elliptic to oblong, the lateral much smaller, triangular, divergent; lf-base below the lobes truncate to long-cuneate; infl sometimes half the length of the shoot; pedicel jointed next to the fl; outer tep lanceolate; inner tep in male fls 1.5–2 mm, obovate, in female broadly ovate; achene 1.5 mm, shiny golden brown, closely invested by the valves; 2n=14, 28, 42. Fields, lawns, and waste places, in acid soils; native of Eurasia, naturalized throughout most of N. Amer., and highly variable."
Inner tepals of ♀ flowers closely appressed to and accrescent with the nut; outer tepals small, lanceolate.
Nut light brown, sharply trigonous, ± 1 mm. long and approximately as broad.
Ocreae hyaline, 4–5 mm. long, readily tearing.
A slender perennial, with erect or decumbent stems, seldom exceeding 30 cm. tall, arising from a basal tuft of leaves.
Male flowers 2–2.5 mm. across, the outer tepals oblong-lanceolate, partly appressed to the inner; inner tepals greenish-brown becoming tinged with red. Anthers yellow, 1 mm. long, longer than the filaments.
Inflorescence slender, paniculate, much-branched, leafless; the flowers borne in close fascicles up to 5 mm. apart.
Leaves long-petioled, hastate, often narrowly so, apically subacute, basally decurrent; the terminal lobe seldom exceeding 4 cm. in length; basal lobes much shorter, narrow, spreading outward and often turning forward; immature leaves often unlobed, linear.
|Sheep or field sorrel, oseille, petite oseille, sûrette|