Flora of North America species comparison

usually erect, sometimes decumbent and ascending, green or purplish, fistulose when stout, 1–7+ cm underground, strigose.

decumbent to ascending or erect, glabrous or strigose.

(3–)5–25(–35) cm;

stipules 3–18 mm, membranous early becoming scarious;

leaflets (7–)13–35, blades lanceolate, lanceolate-oblong, or elliptic, (5–)6–45(–52) mm, apex obtuse, apiculate, or truncate-emarginate, surfaces strigose, sometimes glabrous adaxially.

2–15 cm;

stipules 2–10 mm, papery at proximal nodes, herbaceous at distal nodes;

leaflets (7–)11–27, blades orbiculate, suborbiculate, elliptic, rhombic-elliptic, rhombic-ovate, oblong-ovate, ovate, or obovate, 3–25 mm, apex obtuse, truncate, retuse, or apiculate, surfaces glabrous or glabrate.

20–100+-flowered, flowers spreading-declined;

axis 2.5–16 cm in fruit;

bracts 1.5–10 mm;

bracteoles 0–2.

7–16-flowered, flowers ascending;

axis 1–7 cm in fruit;

bracts 1–7 mm;

bracteoles 2.

erect or incurved-ascending, (2.5–)4–22 cm.

erect or incurved-ascending, 3–15 cm.

1.2–3.5(–4) mm.

1–3.5 mm.

11.3–17(–17.5) mm;

calyx short-cylindric, (4.6–)5.5–10.5(–11) mm, strigose or pilosulous, tube 4–8.5 mm, lobes subulate or triangular, 1.2–4.4(–5) mm;

corolla ochroleucous, greenish white, or stramineous;

keel (9.5–)10.2–13.6 mm.

(16–)16.5–21 mm;

calyx short-cylindric to deeply campanulate, 7–13.5 mm, sparsely strigulose or glabrous, tube 3.5–6.8 mm, lobes subulate to lanceolate, 2–7.1 mm;

corolla ochroleucous, yellowish, whitish, cream, or purple (wing tips sometimes pale or white);

banner recurved through 90°;

keel 11.5–15.5 mm.

brown then blackish, straight or incurved, cylindroid, terete, (9–)10–20 × 2.9–5.2 mm, somewhat fleshy becoming stiffly papery or leathery, usually strigose, strigulose, glabrate, or glabrous, rarely puberulent;

sessile or subsessile.

ascending to declined, pale green, often purple-mottled, becoming brownish or stramineous, sharply incurved, obliquely ellipsoid, dorsiventrally compressed, (15–)20–30 × 6–12 mm, fleshy becoming leathery, glabrous;

septum narrow, subobsolete, to 1.5 mm wide;

gynophore 1.5–5 mm.

(16–)18–26(–28).

18–41.