Flora of North America species comparison

erect, trailing, or twining, 5–50 cm.

climbing or trailing, to 150 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 to reflexed, ovate to triangular, often faintly lobed basally, 2.5–4 × 1–2 mm;

petiole 2–5 cm;

rachis 0.8–1.7 cm;

stipels narrowly triangular to lanceolate, 1–2.5 mm;

leaflet blades linear, narrowly oblong to lanceolate, or narrowly trullate, often lobed basally, 2.5–6 × 0.2–3 cm, thin to subcoriaceous, base truncate to broadly cuneate, apex usually obtuse or long-attenuate, surfaces covered with minute, uncinate hairs, also with incumbent hairs along veins abaxially and marginally.

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 20 cm, rarely with axillary flowers at base;

axis covered with uncinate hairs;

rachis 2–9 cm, with 2–6 biflorous nodes;

primary bracts ovate, 1–1.5 × 0.8 mm, 3–5-veined.

2–12 cm.

3–11 cm.

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

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

3–5(–7) mm, hairs uncinate;

bracteoles persistent, ovate to lanceolate or oblong, 1–1.5 mm, often densely covered with incumbent hairs, often at midpoint of pedicel.

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, 2.5–3.5 mm, sparsely to densely covered with uncinate hairs, veins prominent;

abaxial lobes triangular to narrowly so, apex acute, 1–1.5 mm;

lateral lobes triangular, apex acute, 1 × 1 mm;

adaxial lobes connate, apex emarginate or cleft;

corolla pink to light purple, 12 mm;

banner oblong to orbiculate, 1 mm, apex slightly emarginate;

wings obovate, 12 mm;

keel 5.5 mm;

ovary linear, 3.5 mm, sparsely covered with appressed hairs.

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

pendent, compressed, linear-falcate, 23–30 × 4–8 mm, elastically dehiscent, valves thin, sparsely covered with minute, appressed 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.

3 or 4, brown often mottled with black, oblong, 3.5–5 × 3–4 mm, rugose, reticulate-areolate patterns with rounded mounds;

hilum ovate, 0.5 mm.

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

perennial, often forming dense growth, with thick and elongate tuberous, woody taproots.

= 22.

= 22.