Flora of North America species comparison

climbing or trailing, 100–400+ cm.

often reddish pigmented, prostrate or twining, to 300 cm, slender, terete or angulate, usually sparsely to densely covered with spreading, straight hairs, often yellowish, interspersed with white, hooked hairs.

stipules spreading or reflexed, triangular to lanceolate, 1.5–3.5 × 0.5–1.5 mm, often strigillose;

petiole (2–)3–6(–9) cm;

rachis (0.5–)1–2(–2.5) cm;

stipels ovate to lanceolate, 1–2.5 mm;

leaflet blades ovate to rhombic-ovate, (1–)3–13 × (1–)3–12 cm, membranous to leathery, venation not reticulate, base rounded to depressed-ovate, apex acute to acuminate or obtuse, surfaces abaxially sparsely to densely covered with ascending and uncinate hairs, adaxially glabrous or sparsely covered with ascending and uncinate hairs.

stipules ascending or spreading, triangular to widely ovate or orbiculate, 4–7 × 3–4 mm, acute or obtuse, sometimes auriculiform, 3–many-veined, glabrate or strigillose, ciliate;

petiole 1–5(–8) cm;

rachis 0.5–2 cm;

stipels usually triangular to lanceolate, 1–3 × 1 mm, acute;

leaflet blades narrowly to widely ovate, often with a basal lobe, 1.5–9 × 1–7 cm, membranous or thin, rarely leathery, base broadly cuneate, apex obtuse or acute to long-acuminate, surfaces usually sparsely strigose or hirtellous, often glabrate.

usually with basal and lateral branches developed along main axis (compound raceme), 8–55 cm;

axis sparsely to densely covered with uncinate and often ascending hairs;

rachis (2.5–)8–27.5 cm, with 5–32 often scattered, biflorous nodes, secondary rachis often developed with 3–5 flowers;

primary bracts ovate to lanceolate, 1–4 × 0.3–1.2 mm, 3-veined, glabrous or strigillose;

secondary bracts usually caducous, ovate, 0.5–2.5 × 0.4 mm.

20–56 cm, axis usually covered with uncinate hairs, if straight hairs present, then mainly on peduncle;

rachis 5–12 cm, with 4–40 usually biflorous nodes, often scattered along rachis;

primary bracts usually lanceolate, 2.5–7(–10) × 3–4 mm, 3–many-veined, ciliate, nectariferous.

(1–)5–25 cm.

to 30 cm.

4–9 mm, sparsely covered with uncinate, and often, ascending hairs;

bracteoles usually persistent, ovate to oblong, 0.5–1.2 mm.

arcuate or reflexed and thicker in fruit, 1–3.5(–5) mm, usually shorter than calyx, hairs straight and hooked;

bracteoles persistent, ovate to subulate, 0.5–1.5 mm, usually 1-veined, ciliate, sometimes along pedicels.

calyx campanulate, 3–3.5 mm, glabrous or sparsely covered with ascending hairs;

abaxial and lateral lobes triangular;

adaxial lobes connate;

corolla usually pink to light purple, rarely white, 10–12 mm;

banner usually wider than long, 5–8 mm, apex emarginate, glabrous;

wings obovate, 10–12 mm;

keel 6–7.5 mm;

ovary linear, 5 mm;

style twisted at apex.

calyx campanulate, 1.5–3.5(–4.5) mm, inner surfaces of tube strigillose, outer surfaces usually hirtellous, especially on lower lobe;

abaxial and lateral lobes triangular, 0.5–1.2 mm, apex acute;

adaxial lobes connate, apex emarginate;

corolla pink, lilac, purple, or white, 10 mm;

banner obovate to orbiculate, 4–8 mm, apex emarginate, glabrous;

wings obovate, auriculiform, 0.5–1.4(–1.8) mm;

keel 5 mm;

ovary oblong, 2.5–5 mm, covered with hooked hairs or strigillose.

pendent, compressed, oblong-falcate, (30–)45–78(–86) × 7.5–13 mm, elastically dehiscent, valves papery to slightly leathery, strigillose.

pendent, compressed, usually linear-falcate, 10–33 × 3–7 mm, elastically dehiscent, valves thin, sparsely covered with long, incumbent and hooked hairs or glabrate, sessile.

4–6, light brown, blackish mottled, oblong to reniform, 6–13 × (4–)5–8.3 mm, smooth;

hilum oblanceolate, (1.6–)2.3–3.2 mm.

2–6, brown or gray mottled with black, oblong, orbicular, or reniform, 2–4.5 × 1.9–4.3 mm, smooth;

hilum ovate, 0.3 mm.

perennial, with tuberous taproots.

perennial, with short tuberous roots.

= 22.

= 20.