Flora of North America species comparison

prostrate to erect, often zigzagged, reddish brown, simple or branched from base, wiry, 2–30 cm, papillose-scabrid-ulous.

erect to ascending, sparingly branched in distal 1/2, not wiry, 15–75 cm.

evenly distributed or crowded at branch tips, articulated to ocreae, basal leaves persistent, hardly reduced distally;

ocrea 1–4 mm, papillose-scabridulous, proximal part cylindric, distal part entire or dentate-lacerate;

petiole 0.1–3 mm;

blade 1-veined, not pleated, narrowly elliptic, elliptic, ovate, obovate, or subround, 6–27 × 3–8 mm, margins flat, smooth, irregularly thickened or papillose-denticulate, apex apiculate, green adaxially.

ocrea 7–12 mm, proximal part cylindric, distal part usually persistent, with strong veins, margins entire or lacerate, silvery, later disintegrating into ± persistent brown fibers;

petiole 1–5 mm;

blade light green or yellowish, elliptic to obovate, 30–60(–80) × (8–)10–25 mm, margins flat, apex obtuse;

stem leaves 1.5–3.5(–4) times longer than branch leaves;

distal leaves overtopping flowers in distal part of inflorescence.

axillary;

cymes from near stem and branch bases, sometimes also crowded at branch apices, 1–3-flowered.

axillary;

cymes in axils of most leaves and toward tips of stems and branchs, 1–5-flowered.

enclosed in ocreae, erect to spreading, 2–3 mm.

mostly exserted from ocreae, 3–7 mm.

semi-open or closed;

perianth 1.8–2.5 mm;

tube 22–29% of perianth length;

tepals overlapping, greenish with narrow white or pink margins, almost sepaloid, oblong, cucullate, ± navicular, apex rounded;

midveins thickened, unbranched;

stamens 8.

closed;

perianth 2.8–3.8(–4.2) mm;

tube 20–37% of perianth length;

tepals overlapping, green with yellowish, rarely whitish green, margins, sepaloid, not keeled, oblong to obovate, cucullate;

midveins branched, moderately to heavily thickened;

stamens 7–8.

enclosed in perianth or tip exserted, black, elliptic to ovate, 1.8–2.3 mm, faces subequal, smooth, shiny.

enclosed in perianth, brown to tan, ovate, 3-gonous, 2.3–3.5 mm, faces subequal, ± concave, apex not beaked, edges concave, dull, striate-tubercled; late-season achenes uncommon, 4–5 mm.