Flora of North America species comparison

(1–)2–4 dm, base (1.5–)2–3 mm diam., short hairs usually absent or sparse, sometimes moderately abundant.

(0.3–)0.8–2(–2.5) dm, base 1–2 mm diam., short hairs absent or sparse.

(4–)7–16 cm, sparsely to moderately hairy (hairs to 1 mm), peglike-glandular, not bristly;

leaflet pairs (2–)3(–4);

terminal leaflet broadly obovate, (1–)2–3(–4) × 1.5–3 cm, teeth usually double, (5–)8–15 per side.

(2–)3–9(–15) cm, not to sparsely short-hairy, sparsely to moderately subsessile golden glandular, rigidly bristly (bristles 0.5–1 mm);

leaflet pairs 3–4(–5);

terminal leaflet broadly obovate to flabellate, 0.2–1.2(–2) × 0.5–1.5 cm, teeth ± single, 2–5 per side.

5–20 (proximal to 40) mm, not bristly, short hairs sparse to moderately abundant.

5–12 (proximal to 20) mm, bristly, short hairs absent or sparse.

(5–)10–40;

hypanthia and sepals not bristly;

epicalyx bractlets linear to elliptic, 3–6 × 1–2 mm;

sepals 5–7(–9) mm;

petals widely overlapping, not red-tinged, broadly obovate, 6–12 × 5–11 mm;

filaments 2–4 mm;

styles light reddish brown.

2–8;

hypanthia and sepals prominently bristly, bristles 1–1.5 mm;

epicalyx bractlets elliptic-ovate to lanceolate, 2–3.5(–4) × 1–2 mm;

sepals 4–6(–7) mm;

petals not or scarcely overlapping, often red-tinged, narrowly to broadly obovate, 5–7(–9) × 3–5 mm;

filaments 1.5–2(–3) mm;

styles usually dark red, rarely golden brown.