Flora of North America species comparison

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

dark reddish brown to nearly black, slightly flexuous, ridged, usually glabrous.

compound, 50–140 mm;

petiole 5–30 mm, puberulent, gland present, below proximalmost pinna pair, 0.7–1.5 mm diam., puberulent;

rachis glands scattered, with some between pinna pairs (at pinna pair nodes and internodes);

pinnae 7–31 pairs, 15–70 mm, 3–7 mm between pinna pairs;

leaflets 20–70 pairs per pinna, blades linear, 1.5–3.5 × 0.5–0.8 mm, base cuneate, apex obtuse, not apiculate, surfaces puberulent.

compound, 70–150 mm;

petiole 7–33 mm, glabrous, gland present, below proximalmost pinna pair, 1–2 mm diam., glabrous;

rachis glands between most pinna pairs;

pinnae 3–13, 35–80 mm, 7–20 mm between pinna pairs;

leaflets 15–45 pairs per pinna, blades linear, 5–15 × 0.3–0.6 mm, base cuneate, apex obtuse to acute, not apiculate, surfaces glabrous.

globose heads, densely flowered, 5–9 mm diam., in axillary pseudoracemes of 20–35 heads or terminal pseudopanicles of 1–10 pseudoracemes.

globose heads, densely flowered, 5–8 mm diam., in axillary pseudoracemes of 10–30 heads or terminal pseudopanicles of 1–15 pseudoracemes.

4–9 mm.

2–4 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.

5-merous, bright yellow;

calyx 0.6–1.2 mm;

corolla 1.4–2 mm;

filaments 2.5–3.5 mm;

ovary glabrous.

flattened, linear, 30–140 × 4–8 mm, slightly constricted between seeds.

flattened, linear, 20–105 × 4–8 mm, slightly constricted between seeds.

aril light yellow, obovate, 1–2 mm, forming cap on seed.

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

= 26.

= 26.