Flora of North America species comparison

erect, trailing, or twining, 5–50 cm.

climbing or trailing, 100–400+ 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 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.

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.

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.

2–12 cm.

(1–)5–25 cm.

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

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

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

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

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, 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.

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

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

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

hilum oblanceolate, (1.6–)2.3–3.2 mm.

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

perennial, with tuberous taproots.

= 22.

= 22.