Flora of North America species comparison

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

light to dark reddish brown, not flexuous, ridged, densely pubescent;

stipular spines present.

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.

phyllodic;

phyllode undulate, straight, lanceolate to narrowly oblong-elliptic, 7–20 × 2–7 mm, venation pinnate, midvein usually eccentric, minor veins prominent, apex acute to obtuse, not apiculate, spine-tipped, surfaces slightly pubescent or glabrous;

gland 1, 2–5 mm distal to leaf base;

pulvinus absent.

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, 8–12 mm diam., 1 (or 2) in leaf axils.

4–9 mm.

5–18 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 1–1.7 mm;

corolla 1.6–2.4 mm;

filaments 3.3–4.3 mm;

ovary glabrous or pubescent.

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

flattened, oblong, 30–60 × 4–7 mm, not constricted between seeds.

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

aril yellow, club-shaped, 1–2 mm, forming cap on seed.

= 26.