Flora of North America species comparison

erect or ascending, usually strigulose, rarely glabrous.

erect or ascending, 1–9(–17) cm underground, strigulose.

distally unifoliolate or reduced to phyllodia, 2–10 cm;

stipules connate-sheathing and papery-scarious at proximal nodes, distinct and herbaceous at distal nodes, 1.5–6.5 mm;

leaflets (0 or 1–)3–13, blades linear-filiform to oblong, 3–30 mm, margins involute, apex obtuse to acute, surfaces strigose abaxially, strigose or glabrous adaxially;

terminal leaflet of compound leaves sometimes decurrent distally, not jointed to rachis.

sparse or nearly bladeless and rushlike, 2–11 cm;

stipules connate-sheathing and papery-scarious at proximal nodes, mostly distinct and herbaceous at distal nodes, (1–)2–7 mm;

leaflets 3–13 or distal leaves reduced to rachis (phyllodia), blades linear, linear-filiform, linear-elliptic, or elliptic, 5–30 × 0.5–4 mm, apex acute, surfaces strigulose;

terminal leaflet sometimes decurrent and not jointed to rachis.

7–35-flowered, flowers ascending;

axis 3–30 cm in fruit;

bracts 1–3 mm;

bracteoles 0–2.

3–25-flowered, flowers ascending to declined;

axis 2–20(–23) cm in fruit;

bracts 0.5–2.3 mm;

bracteoles 0–2.

strict, 6–25 cm.

incurved-ascending, 1–14 cm.

0.8–3.5 mm.

1–8 mm.

(13–)14–20 mm;

calyx 4.6–8 mm, strigose, tube 4.1–6.4 × (2.6–)3–3.9 mm, lobes subulate, 0.5–2 mm;

corolla pink-purple and wing tips white, or greenish yellow or whitish;

keel (9.5–)10.5–13.5 mm.

(6.6–)7.6–11.2 mm;

calyx 4–6.3 mm, black-strigose and/or white-strigose, tube 3.4–5.4 mm, lobes triangular-subulate, 0.5–1.4 mm;

corolla ochroleucous, sometimes tinged or veined with purple or pink;

banner abruptly recurved through 90°;

keel (6.2–)6.5–9.4 mm, apex broadly triangular.

erect, green sometimes purple-mottled becoming stramineous, straight or slightly incurved, oblong, slightly compressed laterally, bicarinate, 13–25 × 3.7–9 mm, stiffly leathery to somewhat woody, glabrous or strigose;

sessile.

pendulous to spreading, green, purple, or mottled, becoming stramineous, straight, linear, narrowly oblong, or oblanceoloid, laterally compressed, bicarinate, 13–50(–53) × 2.3–5 mm, papery, strigose;

sessile.

14–26.

11–26.