Flora of North America species comparison

1–6 from crown, trailing and intertwining to form tangled mats or climbing, terete, weakly striate, 500 cm;

internodes ± straight to weakly flexuous, distal internodes nodding;

branches mostly proximal, sometimes distal.

stipules linear, 4–10 × 0.5–1 mm, apex acuminate;

petiole subangular, canaliculate adaxially, 1–4 cm;

stipels linear, 1–3 mm;

petiolules 1–3 mm;

rachis canaliculate adaxially, 2–7 cm;

leaflets 5 or 7, blades polymorphic, ovate, elliptic, obovate- or ovate-elliptic, or oblong, 10–50(–70) × (4–)10–30 mm, membranous, base cuneate to rounded, primary lateral veins 5 or 6 pairs, apex acute to obtuse or retuse, surfaces glabrate.

1(or 2)-flowered, 0.5–1 cm, flowers chasmogamous;

bracts ovate to lanceolate, 2–4(–5) × 1 mm.

0.3–1.5 cm.

3–6 mm;

bracteoles deciduous by fructification, broadly ovate to suborbiculate, conspicuous, shorter than calyx tube or subequaling and obscuring calyx, (4–)6–11(–15) × (4–)6–11(–15) mm, apex acute to rounded, apiculate, glabrous.

yellowish green to green becoming light brownish to tan, flat, (50–)70–110 × 8–11 mm;

stipe 1–2 mm, enclosed within calyx with base of valves.

7–10, brown becoming black, subreniform, compressed, 4–5 × 5–6 mm, not viscid.

proximal portion erect, cylindric, 6–15 × 0.9–1.5 cm;

distal portion 0.3+ m × 3–6 mm.

flowers: calyx tube greenish, 8–14 × 3–4 mm near base becoming 6–9(–11) mm wide, shrinking slightly in fruit;

lobes oblong, 7–12 × 3 mm, apex acute;

corolla pale blue to azure or blue-violaceous with white to yellow medial strip, or white with greenish white medial strip;

banner 40–55 mm, claw 2–4 mm;

wing blades 17–28 × 7–13 mm, claw 7–11 mm;

keel 7–10 × 4–6 mm, claw 14–18 mm;

staminal tube 16–20 mm;

filaments distinct, 3–4 mm;

anthers lanceolate, 1–1.5 mm;

ovary 6–9 mm, densely white-strigose;

style 14–17 mm, geniculate 5–8 mm from distal end.

flowers (“double”): calyx similar to papilionaceous flowers;

corolla azure to dark blue, petals bannerlike;

stamens usually diadelphous or distinct, sometimes with fused bundles of 2–5;

ovary 6–9 mm, densely white-strigose;

style 14–17 mm.