Flora of North America species comparison

pilosulous to glabrescent, bark light tan, fissured in rectangular plate, with conspicuous pale lenticels on young branches.

glabrous, bark brown, rough, with protuberant lenticels.

6–24 cm;

stipules 2–4 mm;

petiole 6–7(–9.5) cm, ribbed to channeled, sometimes pilose;

gland proximal, ± circular;

pinnae 2 or 3 pairs, 7–14 cm, with gland between distal pair;

leaflets 5–7 pairs, blades not bicolored, oblong to ovate, 2–4(–5) cm, venation palmate-pinnate, midvein subcentral, base acute, apex rounded, mucronate, surfaces usually glabrous, sometimes translucent, pilose abaxially;

terminal pair not heteromorphic.

23–30 cm;

stipule length unknown;

petiole 3–7.5 cm, glabrous;

gland near middle, elliptic, length to 1.5 times width;

pinnae 2 or 3(or 4) pairs, 8.5–13 cm, rachis without glands;

leaflets (5–)8–10(–14) pairs, blades slightly bicolored, oblong, slightly asymmetric, 2.5–3.5(–4.5) cm, surfaces with conspicuous palmate venation, midvein marginal or submarginal, base rounded or slightly acute, apex rounded, mucronate, surfaces glabrous;

terminal pair slightly heteromorphic, not larger.

30–40-flowered, (1 or)2 or 3 per node, axillary, capitula;

axis pilose;

floral bracts linear, 2 mm.

15–20-flowered, terminal or axillary, capitulalike corymbs;

axis glabrous.

7–8 cm, pilose;

bracts linear, 3 mm.

4–7 cm, glabrous;

bracts basal.

, except central flowers, 1.5–4.5 mm.

to 1 mm.

calyx tubular, 3–6 mm, lobes 5 or 6, short-pubescent;

corolla campanulate, 4–10 mm, lobes 4 or 5, glabrous except for lobes;

stamens 30, white, 15–25 mm, tube to 4 mm;

central flowers: sessile, calyx to 5.5 mm, lobes 5, pilose;

corolla 10–11 mm, campanulate, lobes 5;

stamens 20–30, to 23 mm, tube to 10 mm.

calyx tubular, 3 mm, lobes 5, sparsely strigillose;

corolla infundibuliform, 7–9 mm, lobes 5, sparsely strigillose;

stamens 30, 15 mm, tube to 5 mm;

central flowers sessile, calyx tubular, 4 mm, lobes 5;

corolla infundibuliform, 12 mm, lobes 5, sparsely strigillose;

stamens 30–35, 20 mm, tube 17 mm.

sessile, ochre-brown, 1.2–18.6(–25) × 3.7–6 cm (including beak), margins straight to slightly constricted between seeds, base rounded, apex acute, with 10 mm beak, glabrescent, usually dehiscent along 1 suture, valves undulating, raised over seeds.

stipe to 1 cm, ochre or reddish brown, 0.7–2 × 1.5–3 cm, margins inconspicuous, base and apex acute, valves membranous, shortly pubescent or glabrescent.

4–11, 7–8(–12) × 7–9 mm.

4–12, 6 × 4 mm.

= 26.

= 26.