Flora of North America species comparison

erect, trailing, or twining, 5–50 cm.

stiff-branched, usually trailing, sometimes climbing, to 300 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.

often unifoliolate on 1–5 nodes of new growth;

stipules spreading or reflexed, triangular to lanceolate, 2–4.5 × 0.5–2 mm, strigillose;

petiole reduced, shorter than terminal leaflet (often only pulvinus), 0.4–3.5 cm;

rachis 0.5–2 cm;

stipels oblong to ovate or triangular, 1.5–2.5 mm;

leaflet blades often variegated on midvein, usually ovate to widely ovate or trullate to widely trullate, sometimes lanceolate, laterals 2.5–7(–8.6) × 1–5(–6.5) cm, terminal 3–8(–10.5) × 0.1–0.6(–1) cm, leathery, base oblique, cuneate or truncate, apex acute, strongly apiculate, surfaces glabrous or sparsely covered with incumbent and uncinate hairs along veins and margins.

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.

to 85 cm;

main axis glabrous or sparsely covered with uncinate hairs, often also with incumbent hairs;

rachis to 45 cm, with 6–25 biflorous nodes or with additional flowering axes (sometimes proximal nodes subopposite);

primary bracts triangular, 1–2.5(–3.5) × 0.5–1 mm, 3-veined.

2–12 cm.

often with lateral inflorescences, to 40 cm.

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

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

3–10 mm, glabrous or sparsely to densely covered with uncinate hairs;

bracteoles often persistent, triangular to lanceolate, 0.5–1 mm, apex ciliate.

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, 3–4 mm, glabrous or sparsely covered with incumbent and uncinate hairs;

abaxial lobes triangular;

lateral lobes triangular;

adaxial lobes ± connate;

corolla lavender to purple or violet, 13 mm;

banner obovate to oblong, 10 mm, apex emarginate, outer surface often sparsely to densely covered with appressed hairs;

wings obovate to oblong, 10–13 mm;

keel 6 mm;

ovary linear, 4–5 mm, glabrous.

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

pendent, compressed, oblong-falcate, (25–)35–53 × 6–11 mm, elastically dehiscent, valves leathery, glabrous, stipe to 5.5 mm.

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.

3–6, grayish or light brown, mottled and streaked with black, oblong to transversely oblong, 4–7.5 × 4–5.7 mm;

hilum ovate to lanceolate, 1.2 mm, smooth.

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

perennial, with large, tuberous taproots.

= 22.

= 22.