Flora of North America species comparison

erect, incurved ascending.

glabrous or hairs whitish, to 0.7 mm.

(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.

(2–)2.5–8(–9) cm;

stipules usually persistent;

petiole (1.5–)2–5(–6) mm, usually glabrous;

leaflets (7–)10–22(–25) pairs, blades (3–)4–14 × 1–3 mm, margins ciliolate, some hairs 0.4+ mm.

1(or 2)-flowered, axillary.

0.5–4[–16] mm;

bracteoles mid pedicel.

0.5–4 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.

corolla often fading pinkish, petals to 3.5–7(–7.5) mm;

stamens (4 or)5–8, staminodia 0;

anthers to 2–3 mm;

ovary hairy throughout;

ovules 8–19.

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

(17–)20–48(–56) × 2.5–3.8(–4) mm.

[1.9–](2.2–)2.4–3.4[–3.7] mm.

2.5–3.2 mm.