Flora of North America species comparison

lenticellate, without conspicuous short shoots;

bark light gray, smooth.

9.5–13 cm;

stipules spinescent, straight, 8 mm;

petiole with flat proximal elliptic gland, 1–2 cm, glabrescent;

pinnae 2–4 cm, rachis with gland between 1 or 2 distalmost pair of pinnae, sometimes puberulent;

leaflet blades oblong, 5–6 × 2 mm, base oblique-rounded, apex acute with small mucro.

capitate, 2 or 3 per node, on short axis, strigulose, flower heads 2.5–4 cm diam.;

bract caducous, linear-lanceolate, 0.7 mm.

in groups of 2 or 3, 1.8 cm, strigulose.

sessile;

bracteole caducous, proximal, 1 mm;

calyx 1.2 mm, estrigulose toward apex;

corolla campanulate, 4.3 mm, 4- or 5-lobed, strigulose toward apex;

stamens white or brownish cream, 10 mm, tube 3 mm;

ovary 1 mm, glabrous.

6.5–9 × 1–1.5 cm, margins thin, base rounded, apex apiculate, beak to 7 mm, valves membranous, fuscous-ferruginous;

stipe to 1.2 cm.

7 × 5 mm.