Flora of North America species comparison

erect or ascending, (0–)1–12+ cm underground, villous.

erect or ascending, with 5–10 well-developed internodes, glabrous or glabrate.

(2–)3–12 cm;

stipules distinct, subterranean ones often fully amplexicaul but distinct, 7–15 mm, foliose at distal nodes;

leaflets (5–)7–13(–15), blades elliptic, oblong or lanceolate-elliptic, 10–30(–35) mm, pinnately veined, apex obtuse to rounded, surfaces sparsely villosulous or villous abaxially, glabrous adaxially.

(4.5–)7–17 cm;

stipules 0.5–2.5 mm, papery-membranous at proximal nodes, herbaceous and membranous-margined at distal nodes;

leaflet blades narrowly oblong, lanceolate-elliptic, narrowly oval, or sublinear, (3–)6–26 mm, apex retuse to obtuse, surfaces sparsely strigulose-pilosulous or, sometimes, glabrous adaxially or ciliate.

appearing subumbellate, loosely 5–11-flowered;

axis 1–5 cm in fruit;

bracts (1.5–)2.5–3.8 mm;

bracteoles 0.

(12–)15–40-flowered;

axis 5–15(–18) cm in fruit;

bracts 1–3 mm;

bracteoles 0.

erect, 3–9.8 cm, usually longer than subtending leaf.

erect or incurved-ascending, 6–15 cm, together with racemes shorter than stems.

1.5–5 mm.

0.6–3 mm.

13–19 mm;

calyx campanulate to subcylindric, 7.5–8.8 mm, villosulous, tube 6.3–8 mm, lobes broadly triangular, 0.6–0.8 mm;

corolla yellowish with whitish margins, banner sometimes purple bordered white, keel 13.2–16 mm.

(13.5–)14.4–18.8 mm;

calyx (5.7–)6–8.3 mm, strigulose, tube (4.7–)5–6.3 mm, lobes triangular to subulate, 1–2.3 mm;

corolla banner recurved through 40°;

keel 12.5–15 mm.

green becoming brown, ± straight, ovoid, inflated, 15–21 × 5.5–8 mm, papery-membranous, black-pilose, hairs to 0.5 mm;

stipe 5–7 mm, pubescent.

brownish stramineous, strongly incurved, 23–31 × 4.5–6 mm, fleshy becoming stiffly leathery or subligneous, glabrous;

septum 0.8–1 mm wide.

6–10.

= 16.