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.

2–7 cm;

stipules usually persistent;

petiole 2–7 mm;

leaflets (6–)8–23(–26) pairs, blades (4–)6–26 × 1–3 mm, margins glabrous or hairs to 0.4 mm.

1(or 2)-flowered, axillary.

0.5–4[–16] mm;

bracteoles mid pedicel.

0.5–2 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 3.5–6.5(–7) mm;

stamens 4 or 5, staminodia 0–2(or 3);

anthers to (1.4–)1.7–2.8 mm;

ovary usually slightly hairy, rarely glabrate;

ovules 5–10.

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

18–43 × (2.8–)3.2–5.5(–5.8) mm.

[1.9–](2.2–)2.4–3.4[–3.7] mm.

2.7–3.4 mm.