Flora of North America species comparison

prostrate to erect, branched, flexuous, 5–200 cm.

usually 1–7, procumbent to ascending, sometimes erect, mostly branched from base, (5–)15–60 cm.

ocrea 3–15 mm, proximal part cylindric or ± funnelform, distal part silvery, hyaline, soon disintegrating into persistent fibers or nearly completely deciduous;

petiole 0.3–9 mm;

blade green to gray-green, narrowly elliptic, lanceolate, elliptic, obovate, or spatulate, 6–50(–60) × 0.5–22 mm, margins flat, apex acute, obtuse, or rounded;

stem leaves 1–4 times as long as adjacent branch leaves;

distal leaves overtopping flowers.

ocrea (3–)4–8 mm, proximal part cylindric, distal part with inconspicuous veins, eventually disintegrating and leaving few or no fibrous remains;

petiole (0.3–)1–3(–5.2) mm;

blade green, lateral veins visible but not raised abaxially, narrowly elliptic or oblanceolate, (7.6–)12.2–34(–40) × 1.5–6.8(–8) mm, (3.4–)4.2–9.2 times as long as wide, apex acute or obtuse;

stem leaves 1–2.7(–3.3) times as long as branch leaves.

axillary;

cymes uniformly distributed or aggregated at tips of stems and branches, 1–6(–8)-flowered.

enclosed in or exserted from ocreae, 1.5–5 mm.

mostly enclosed in ocreae, 1.5–3 mm.

closed or semi-open;

perianth 1.8–5.5 mm;

tube 20–57% of perianth length;

tepals overlapping or not, green or reddish brown with white, pink, or red margins, petaloid, not keeled, oblong to obovate, often cucullate in fruit;

midveins branched or unbranched, thickened or not;

stamens 5–8.

perianth (1.9–)2.3–3.4 mm, 1.6–2.6 times as long as wide;

tube 28–48% of perianth length;

tepals overlapping, spreading slightly as achene matures, green usually with pink or red, rarely white, margins, oblong, ± cucullate, outer tepals not pouched at base;

veins branched, moderately to strongly thickened;

stamens 7–8.

enclosed in or exserted from perianth, light to dark brown, ovate, (2–)3-gonous, 1.2–4.2 mm, faces subequal or unequal, apex not beaked, edges slightly concave, dull, usually coarsely striate-tubercled, sometimes obscurely tubercled; late-season achenes common or not, 2–5 mm.

exserted from perianth, dark brown, ovate, 3-gonous, 1.2–1.8 mm, faces unequal or, less often, subequal, flat to concave, apex with straight edges or somewhat bent toward narrow face, striate-tubercled or, rarely, obscurely so; late-season achenes uncommon, 2–3.7 mm.

uniformly distributed along stems and branches, 1–3(–5)-flowered.

= 40, 60.