Flora of North America species comparison

yellowish green, twigs glabrous or sparsely pubescent (at least around nodes).

dark to olive green, twigs moderately to densely pubescent.

appearing pinnate;

stipules obsolescent or spinescent, spines to 20 mm;

petiole obsolete;

pinnae 2(or 3);

petiolules 0.2–0.3 mm, sparsely pubescent;

rachillas (100–)150–600 mm, narrowly winged, with sparse, glandular patches in leaflet axils;

leaflets 40–76, alternate, subopposite, or opposite, blades oblanceolate to oblong, 2–8 × 0.9–3 mm, base attenuate, apex obtuse, apiculate, surfaces sparsely pubescent abaxially, glabrate adaxially.

stipules not spinescent;

petiole 1.8–3.5 mm, pubescent;

pinnae 2;

petiolules 0.2–0.3 mm, densely pubescent;

rachillas 1.5–12 mm, not winged, with glandular patches on adaxial side, not surrounding leaflet pulvini;

leaflets 2–6(or 8), opposite, blades oblanceolate to obovate, 2–3.5 × 0.8–1.9 mm, base cuneate to attenuate, apex truncate or rounded, apiculate or not, surfaces sparsely pubescent abaxially, sparsely pubescent to glabrate adaxially.

2–15-flowered, axis 8–18 cm, strigulose to glabrate;

bracts linear or lanceolate, 2 × 0.3 mm;

bracteoles caducous or subpersistent.

2–10-flowered, axis 0.4–3.5 cm, strigulose to glabrate;

bracts deltate or lanceolate, 0.3–0.5 × 0.2–0.3 mm;

bracteoles persistent or caducous.

5.4–13.8 mm, glabrous or sparsely pubescent, joints 1.5–3.5 mm from flower, not bearded, nearer flower than pedicel base.

4–11.3 mm, sparsely pubescent or glabrate, joints 2–4.2 mm from flower, bearded, equidistant between flower and pedicel base, distinctly nearer pedicel base, or nearer flower than pedicel base.

calyx lobes usually deciduous, sparsely pubescent abaxially, pubescent adaxially;

corolla 13–20 mm diam., petals light to deep yellow, adaxial one usually orange-dotted basally;

ovary sericeous.

calyx lobes moderately pubescent abaxially, glabrous adaxially;

corolla 7.9–16 mm diam., petals light to deep yellow, adaxial one often orange-spotted basally;

ovary sericeous or glabrate.

subterete, constricted between seeds, 2–12 × 0.5–0.8 cm, glabrous.

compressed, irregularly and indistinctly torulose, 2.9–5.9 × 0.5–0.8 cm, pubescent, at least basally, or glabrate.

(1 or)2–5.

1–4.

= 28.

= 28.