Flora of North America species comparison

stipules persistent or deciduous, conspicuous, leafy, 3–25 mm, 2 or 3-lobed, lobes unequal, asymmetric, apex mucronate and rounded to emarginate;

petiole 5–10 mm;

rachis (15–)20–50(–80) cm, armed abaxially with recurved prickles often paired at insertion of pinnae;

pinnae 3–11 pairs, 4–20 cm;

leaflets (4 or)5–10(–24), opposite to subopposite, blades ovate-oblong to elliptic-oblong, (0.8–)1.3–4.5(–6.5) × (0.5–)0.8–2.2(–2.5) cm, base usually rounded to acute, rarely acuminate, apex acute to obtuse, mucronate, surfaces pubescent or glabrous, midveins and margins pubescent.

axillary, (10–)20(–60) cm;

bracts recurved, linear-lanceolate, 0.8–1.6 cm, longer than buds, pubescent.

2–6 mm, jointed.

sepals reflexed during anthesis, 6.5–8 ×2–3 mm, shorter than petals, pubescent;

corolla yellow or greenish yellow, (10–)12–13 × 3–4 mm;

banner claw reflexed, 3 × 1 mm, glabrous abaxially, densely hairy adaxially;

claws of other petals spatulate basally, 7 × 2 mm, hairy adaxially, sometimes ciliate;

filaments 2–5 mm, hairy basally;

anther 1–1.3 mm;

ovary 2–3 mm, covered with stiffish hairs, densely set with long prickles;

ovules 2;

style 3 mm, hairy, stigma ciliate.

(3–)4.5–7.6(–9) × (2.5–)3.5–4.5 cm, faces densely spreading-prickly.

1 or 2, leaden gray, ovoid to globose, 15–20 mm diam., smooth, hard, cuticle of testa with parallel concentric lines.

= 24.