Flora of North America species comparison

slender, erect, solitary or clustered, moderately or few-branched, from woody rootstock or rhizomes;

branches ascending at 20–45º, weakly or moderately zigzag.

slender, erect or ascending, solitary or clustered, few-branched, from woody rootstock or rhizomes;

branches ascending at 25–50º, weakly zigzag.

stipules persistent, widely ovate or elliptic, 1.7–4.5 × 0.7–2.5 cm, base oblique to cuneate, apex acuminate or acute;

petiole 1–4 cm;

leaflet blades elliptic or obovate, 3.5–8 × 0.7–3(–5) cm, lateral veins 6–11 pairs, conspicuously net-veined abaxially or not, apex acute or obtuse, sometimes short-mucronate or emarginate, surfaces sparsely appressed-pubescent or glabrous.

stipules persistent, ovate to widely ovate or elliptic to widely elliptic, 1–2.6 × 0.5–1.5(–2.2) cm, base cuneate to oblique, apex acute to obtuse, short-mucronate;

petiole 0.8–2.2 cm;

leaflet blades elliptic to obovate or narrowly elliptic, 1.7–3.3 × 0.6–2 cm, lateral veins 5–7 pairs, conspicuously net-veined abaxially, apex acute to obtuse, sometimes short-mucronate, surfaces appressed-pubescent to sparsely tomentose or glabrate abaxially, glabrous adaxially.

6–25-flowered, 4–25 cm;

flowers in whorls of 2 or 3 or scattered.

5–15-flowered, 4–12 cm;

flowers in whorls of 2 or 3 or scattered.

2–8 cm;

bracts semipersistent, narrowly elliptic or elliptic to widely ovate, 6–10 × 2.5–6 mm.

1–4 cm;

bracts deciduous, elliptic to obovate, 5–9 × 3–5 mm.

3.5–5 mm, villosulous.

3–7 mm, glabrate to densely appressed-pubescent.

1.6–2.2 cm;

calyx 9–11 × 5–8 mm at limb, lobes 3–5 mm, shorter than tube;

wings and keel petals asymmetrically oblong-elliptic;

ovary velutinous or densely appressed-pubescent;

ovules 10–16.

1.9–2.1 cm;

calyx (6–)8–10(–12) × 4.5–6 mm at limb, lobes (3–)4–5 mm, equal to or shorter than tube;

wing petals asymmetrically oblong to very widely ovate, keel petals asymmetrically oblong-widely elliptic;

ovary glabrate to appressed-puberulent;

ovules 12–14.

ascending, straight, 4.5–6.5 × 0.4–0.6 cm, villosulous or appressed-pubescent.

divergent, strongly arcuate to annular, 3–7 × 0.4–0.7 cm, glabrate to sparsely tomentose.

6–16, brown-black, oblong, 3.5–5 × 2.5–3 mm, beaked.

2–10, brown, elliptic, 3.5–4 × 2.5 mm, beaked.

= 18.