Flora of North America species comparison

(relatively short), 2–3 mm diam., (covered with extensive root system).

often elongated, usually slender, rarely thickened, 1–2(–5) mm diam., (not fleshy).

erect to ascending, unbranched or branched distally, 0.9–4 dm.

(simple or few to several from base), erect to ascending, (not flexuous), unbranched basally, sometimes branched distally, (0.3–)0.8–2.5(–3) dm.

(sometimes withered by anthesis), rosulate, pinnately compound, (3 or) 5 or 7 (or 9)-foliolate, 2–5(–9) cm, leaflets petiolulate or subsessile;

lateral leaflets shortly petiolulate or subsessile, blade usually broadly ovate, rarely broadly obovate or orbicular, smaller than terminal, margins usually entire, rarely slightly 3 (or 5)-lobed or crenate;

terminal leaflet subsessile, blade reniform or orbicular, 0.4–0.8(–1.2) cm × 5–9(–16) mm, margins entire or 3 (or 5)-lobed or crenate.

usually 3-foliolate, rarely simple, 1–8 cm, leaflets petiolulate or subsessile;

petiole 0.5–5 cm;

lateral leaflets subsessile, often minute;

terminal leaflet (petiolule 0.4–2 cm), blade orbicular to broadly ovate, 0.5–3 cm × 5–25 mm, base rounded, margins entire, repand, or dentate.

5–10, petiolate;

middle leaves often simple, petiole 0.3–1.5 cm, blade rhombic to suborbicular or ovate, 1–3.5 cm × 6–22 mm, base obtuse to cuneate, margins entire, repand, or dentate;

distal ones with shorter petiole, blade smaller.

3–5(–7), 3–7 (or 9)-foliolate, petiolate, leaflets subsessile or sessile;

base not auriculate;

lateral leaflets: blade narrowly obovate, oblanceolate to linear, margins similar to terminal;

terminal leaflet blade narrowly obovate, ovate, oblanceolate, lanceolate, oblong, margins usually entire, sometimes 3-lobed or crenate.

ebracteate.

ebracteate, (subumbellate, 2–8(–14)-flowered, rachis usually 3–20 mm).

sepals (ascending), oblong, 1.5–2.2 × 0.7–1 mm, lateral pair not saccate basally;

petals (somewhat spreading), white, oblanceolate, 3.5–5 × 1.2–1.8 mm, (not clawed, apex rounded);

filaments: median pairs 2.5–3 mm, lateral pair 2–2.5 mm;

anthers ovate, ca. 0.2 mm.

sepals (greenish or purplish), oblong, 1–2 × 0.5–1 mm, lateral pair not saccate basally;

petals white, narrowly obovate, 2.5–5 × 1–3 mm.

divaricate, 9–17 mm.

suberect to ascending, 3–8(–10) mm.

linear, 0.8–1.6 cm × 0.8–1 mm;

ovules 16–22 per ovary;

style 1.2–1.8 mm.

linear, (torulose), (1.3–)1.8–2.5(–3) cm × 0.8–1.5(–2) mm; (valves glabrous or sparsely pubescent);

style 0.5–2 mm.

brown, oblong to ovoid, 0.9–1.2 × 0.6–0.8 mm.

brown, oblong, 1–1.5 × 0.8–1 mm.

= 32, 36, 48.