Flora of North America species comparison

erect, ± glandular, glabrate; unbranched or sparsely branched;

proximal nodes often with cataphylls.

to 100 cm, unbranched, glandular, minutely pubescent basally, mostly glabrate distally;

cataphylls only at distal nodes, to 7 mm.

alternate, odd-pinnate;

stipules present, deciduous or persistent, reflexed, distinct;

petiolate;

leaflets 3, very rarely 4, petiolulate, blade margins entire, surfaces glabrous or pubescent.

stipules persistent or tardily deciduous, green, widely elliptic to obtriangular, 13–15 × 3–5 mm, glandular, sparsely puberulent;

petiole 1–3 cm, canaliculate, base swollen and different color and texture, glandular, glabrate;

rachis 2–2.8 cm;

petiolules brown (darker than rachis), 1.5–3 mm, very sparsely pubescent (more so on adaxial surface);

leaflet blades darker adaxially, lanceolate to widely ovate, 4–9 × 1.4–4.2 cm, base broadly attenuate, apex acute, surfaces glandular and glabrous.

2 or 3 flowers per node (3–20 nodes), axillary, pseudoracemes;

bracts present, deciduous.

with 5–20 nodes, 3 flowers per node, short-ellipsoid;

rachis 1.5–6 cm, longer or shorter than peduncle, not elongated in fruit, internodes to 4 mm;

bracts late deciduous, caudate-flabelliform, 9–13 × 5–8 mm, glandular, puberulent.

1–8 cm, sometimes darker, less glandular than petiole.

present.

2 mm.

papilionaceous;

calyx tubular-campanulate (in bud), gibbous to campanulate (in fruit, concealing fruit), lobes 5, lobes equal to or less than tube;

corolla cream or yellow, sometimes with purple blotch on wing blades and keel petals;

banner bi-auriculate, wings auriculate, keel always shorter, apical margins connate;

stamens 10, monadelphous early with vexillary stamen becoming distinct;

anthers in 2 series, proximal ones dorsifixed, distal basifixed, introrse;

receptacle tumid, style reflexed.

14–15 mm;

calyx persistent, slightly gibbous-campanulate in fruit, becoming stramineous, veins prominent, glandular, darker brown in fruit, villosulous to glabrate, tube stramineous, 5–6 mm, lobes green;

corolla cream or yellow;

filaments 9–10 mm;

anthers elliptic;

pistil 8.5–10 mm;

ovary sparsely pubescent apically.

legumes, sessile, elliptic or compressed-obovate, indehiscent, sometimes secondarily dehiscent by transverse rupture, apiculate or with beak ventrally displaced at maturity, eglandular or sparsely glandular, pubescent.

elliptic, 7–10 mm, beak broadly attached, 1–3 mm, glandular, glands golden, minute, fading in age, sparsely pubescent.

1, round to reniform, smooth.

red-brown, 6–7 × 4 mm.