Flora of North America species comparison

unbranched, relatively slender, (25–)30–70(–90) cm.

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

(3–)6–19(–22.5) cm;

leaflets (9–)13–19(or 21), blades 10–45(–50) mm, thin.

(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.

sometimes interrupted proximally, 2.5–12 × 2.7–3.5 cm, flowers (12.6–)13.2–16.5 mm.

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

axis 2.5–16 cm in fruit;

bracts 1.5–10 mm;

bracteoles 0–2.

rather slender, 6–22 cm.

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

1.4–2 mm.

1.2–3.5(–4) mm.

calyx (6.5–)7.4–10.5(–11) mm, lobes (1.5–)2–4.4 mm, adaxial pair usually not much broader (though sometimes shorter) than the rest;

corolla greenish white or ochroleucous.

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.

grooved dorsally, (9–)11–20 × 3–5 mm, beak (3–)3.5–5 mm, thinly strigose or glabrate;

septum (2–)2.5–3.4 mm wide.

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.

(16–)18–26.

(16–)18–26(–28).

3.5–11(–14) mm, proximalmost persistent, not ruptured.

= 16.