Flora of North America species comparison

slender, ascending or spreading, solitary or clustered, several-branched, from extensive rhizomes;

branches spreading at 45–80º, strongly zigzag.

stipules caducous, narrowly elliptic to linear, 1.5–2 × 0.3–0.5(–0.8) cm, base cuneate, apex acuminate;

petiole 0.7–1.7 cm;

leaflet blades elliptic, 3.5–8 × 1–4 cm, lateral veins 7–9 pairs, conspicuously net-veined abaxially, apex acute to acuminate, surfaces sparsely appressed-pubescent (especially on veins), sometimes glabrate adaxially.

terminal, 5–17-flowered, 7–20 cm;

flowers scattered.

3–7 cm;

bracts persistent, lanceolate, 8–13 × 2–4 mm.

4–6 mm, villosulous.

1.6–1.9 cm;

calyx 7.5–8 × 6–7 mm at limb, lobes 2–3 mm, shorter than tube;

wing petals elliptic to asymmetrically oblong-elliptic, keel petals asymmetrically oblong-elliptic;

ovary densely appressed-pubescent;

ovules (8–)12–16.

divaricate, arcuate to straight, (3–)4–9 × 0.4–0.6 cm, densely appressed-pubescent.

6–12, tan to brown-black, oblong, 2.5–3.5 × 1.5–2 mm, beaked.

= 18.