Flora of North America species comparison

sparsely branched proximally (central stem dominant); glabrous.

stipules 3–5-fid, 0.5–1 mm (scarious);

petiole 2–6(–8) cm;

leaflet blade elliptic, ovate, or ovate-oblong, 0.8–2.4 × 0.4–1.4 cm, thin, margins entire, apex obtuse to retuse, mucronulate, surfaces glabrous.

racemes, terminating stems, 3–10 cm (2–20 cm in fruit);

bracts unifoliate, 5–9 mm.

divergent in fruit, 5–12 mm (4.5–17 mm in fruit).

sepals green, ovate-lanceolate, 1–2 × 0.5–0.7 mm, glabrous;

petals yellow, oblong, (3.5–)4–8 × 1.8–2.2 mm, glabrous;

stamens (well-exserted), yellow, 8–12 mm;

anthers 2.5–3 mm;

gynophore ascending, 3.5–15 mm in fruit;

ovary ovoid, 1–1.3 mm;

style (0.7–)1–2 mm.

rhomboidal, 3.5–6 × 4–10.5 mm, glabrous.

(1 or) 2–6, stramineous, globose, 2–2.7 mm, smooth.