Flora of North America species comparison

dark purplish brown to black, slightly flexuous, ridged, pruinose, densely puberulent.

compound, 80–170 mm;

petiole 8–22 mm, densely puberulent, gland present, below proximalmost pinna pair, 0.5–1 mm diam., puberulent;

rachis gland between most pinna pairs;

pinnae 6–30 pairs, 15–55 mm, 2–7 mm between pinna pairs;

leaflets 15–70 pairs per pinna, blades linear, 2–5 × 0.4–0.8 mm, base cuneate, apex obtuse to acute, not apiculate, surfaces densely puberulent.

globose heads, densely flowered, 6–9 mm diam., in axillary pseudoracemes of 11–30 heads or terminal pseudopanicles of 1–15 pseudoracemes.

2–6 mm.

5-merous, pale yellow to cream;

calyx 0.6–1.1 mm;

corolla 1.4–2 mm;

filaments 3.5–4.5 mm;

ovary glabrous.

flattened, oblong, 20–110 × 6–14 mm, constricted between some seeds.

aril light yellow, obovate, 2–3 mm, forming cap on seed.

= 26.