Flora of North America species comparison

(1.5–)2–8(–9)[15–21] cm;

petiole (1.5–)2–7 mm;

extrafloral nectary 1(or 2), near mid petiole, stipitate;

leaflets (6–)8–28(–32)[–40] pairs, blades usually straight, sometimes falcate, linear, narrowly oblong, or oblong-elliptic, (3–)4–26 × 1–3 mm.

(1.5–)2–7.5(–9) cm;

stipules persistent;

petiole (1.5–)2–7 mm, pubescent, hairs yellow or orange reddish, 1–2.5 mm;

leaflets (12–)16–28(–32) pairs, blades 4–14 × 1–2.3 mm, margins glabrous or hairs to 0.4 mm.

1(or 2)-flowered, axillary.

0.5–4[–16] mm;

bracteoles mid pedicel.

1–2.5 mm.

calyx greenish, sepal venation reticulate;

corolla yellow, sometimes fading pinkish, petals to 3.5–8(–9)[–16] mm;

stamens [2–]4–8[or 9];

anthers yellow-orange or red, to (1.4–)1.6–3[–9.5] mm, different sizes;

ovary usually hairy throughout, rarely glabrate.

petals to 5–8(–9) mm;

stamens 5–8, staminodia 0–2 (or 3);

anthers to 1.6–2.8 mm;

ovary slightly hairy throughout;

ovules 5–10.

straight, linear-oblong, [14–](15–)18–48(–56)[–78] × [2.4–]2.5–5.5(–5.8) mm.

(15–)18–32(–36) × (3.5–)4–5.5 mm.

[1.9–](2.2–)2.4–3.4[–3.7] mm.

(2.2–)2.4–3.3 mm.