Flora of North America species comparison

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

strigillose, bark light gray, smooth, with inconspicuous scattered, brownish 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.

20–32 cm;

stipules 2 mm;

petiole 3–7.5 cm, glabrescent or puberulent;

gland proximal or sub-basal, elliptic, length to 1.5 times width;

pinnae (4 or)5–12 pairs, 5.5–10 cm, with gland between 1 or 2 distal pairs;

leaflets (13–)17–22(–36) pairs, blades not bicolored, oblong, 0.7–1.5 cm, venation palmate, midvein marginal or submarginal, base strongly asymmetric, truncate, apex acute, short-mucronate, surfaces glabrous or sparsely pubescent;

terminal pair not heteromorphic.

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

axis pilose;

floral bracts linear, 2 mm.

18–25-flowered, terminal or axillary, capitula;

axis densely strigillose.

7–8 cm, pilose;

bracts linear, 3 mm.

3–9 cm, densely strigulose;

bracts linear-lanceolate, 2(–5) mm.

, 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 campanulate, (2.5–)6 mm, lobes 5 or 6, glabrescent;

corolla campanulate, (8–)12 mm, lobes 4 or 5, strigillose distally;

stamens 32, white proximally, pink distally, 30–35 mm, tube (10–)12 mm;

terminal or central flower calyx 3 mm, lobes 5, glabrous;

corolla 9–12 mm, lobes 5;

stamens 28 mm, tube long-exerted, to 18 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.

fuscous-ferruginous, 10–20 × 1.5–2.6 cm, margins straight or slightly constricted, base acute, apex rounded, narrowing to a beak to 1.5 cm, valves membranous, glabrescent, smooth or slightly rough.

4–11, 7–8(–12) × 7–9 mm.

6–8(–10), 9 × 5 mm.

= 26.

= 26, 52.