Flora of North America species comparison

erect, trailing, or twining, 5–50 cm.

trailing or climbing, to 250 cm.

stipules sometimes red-purple pigmented, appressed to stem, reflexed or distally spreading, ovate to ovate-lanceolate, 1.8–6.5(–8.5) × 0.7–3(–4) mm (larger distally);

petiole 1.8–3.4 cm;

rachis 0.4–1 cm;

stipels subulate to ovate or lanceolate, 1–2.5 mm;

leaflet blades usually linear to lanceolate, sometimes narrowly trullate, sometimes terminal leaflets with 2 basal lobes each side, lateral leaflets often ± distinctly round lobed basally on 1 or both sides, laterals 2–4.7 × 0.5–1.3(–2.8) cm, terminal 2.4–5.6 × 0.3–1.2(–2.7) cm, thin, base attenuate, apex round or acute, obscurely apiculate, surfaces sparsely pubescent abaxially, scabrous adaxially.

stipules usually ascending, ovate to broadly triangular, 1–2.5 × 0.8–2.4 mm;

petiole 2–5.5 cm;

rachis 0.5–2 cm;

stipels linear to ovate-lanceolate, 0.5–1.5 mm;

leaflet blades ovate in outline, not lobed or shallowly to deeply lobed basally, lobes quadrate-obtuse to oblong-attenuate, 1–5 × 1–4.5 cm, membranous to rigid, base broadly cuneate to truncate, apex obtuse to acute, surfaces covered with uncinate hairs, abaxially with incumbent hairs along veins.

2–18 cm;

axis sparsely covered with minute, uncinate hairs;

rachis 0.2–0.6 cm, with 1–3 (usually 1-flowered) nodes;

bracts lanceolate, 4 × 1.5 mm, 4–6-veined.

1.2–16 cm;

axis covered with uncinate hairs;

rachis 0.2–7.5 cm, with 2–6 biflorous nodes;

primary bracts ovate to lanceolate, 1–2 × 0.5 mm, often pigmented, 3-veined.

2–12 cm.

often angled, 1–10 cm.

to 10 mm, shorter than flowers, uncinate-pubescent;

bracteoles persistent, ovate or obsolete, 0.1–0.5 mm.

5 mm, hairs uncinate;

bracteoles persistent, oblong-ovate to narrowly triangular, 0.6–1.3 mm, often covered with uncinate hairs.

calyx campanulate-tubular, 5–8 mm, adaxial proximal portion rounded, papillate, covered with minute, uncinate hairs;

abaxial lobes lanceolate;

lateral lobes usually triangular, sometimes falcate;

adaxial lobes connate nearly throughout;

corolla violet, lavender-pink, or purple, 15–25 mm;

banner obovate or spatulate, 12–16 mm, apex obtuse, emarginate;

wings obovate, 15–27 mm, rounded-auriculate on distal margin at base;

keel 10 mm;

ovary linear, 6–7.5 mm, glabrous, marginally scabrous.

calyx campanulate, 2–3.5 mm, sparsely to densely covered with uncinate hairs;

abaxial and lateral lobes triangular;

adaxial lobes connate;

corolla pink, lavender, reddish to light purple, or white fading yellowish, 10 mm;

banner oblong to orbiculate, 10 mm, apex emarginate, surfaces glabrous;

wings obovate, 10 mm, apex acute or obtuse;

keel 6 mm;

ovary linear, 3 mm.

horizontal to pendent, terete, linear-straight to slightly falcate, 35–45 × 3–4 mm, elastically dehiscent, valves leathery, glabrous.

pendent, compressed, linear-falcate, 23–35 × 4–5 mm, elastically dehiscent, valves membranous, sparsely covered with incumbent and uncinate hairs.

8–11, usually brown to light brown or grayish green, punctate and mottled black, sometimes light green, oblong or reniform, 2–3.7 × 1.7–2.6 mm, smooth;

hilum ovate-oblong, 0.4–0.5 mm.

4–6(or 7), brown, usually oblong to quadrate, rarely reniform, 2–4.3 × 2.3–4 mm, rugose;

hilum ovate, 0.3 mm.

perennial, with deep-seated, oblong or spherical tuberous taproots.

annual or short-lived perennial, frequently mat-forming, with slender taproots.

= 22.

= 22.