Flora of North America species comparison

(0.6–)0.7–1.6(–2.4) dm.

(0.3–)0.4–1.1(–1.2) dm.

petiole differentiated from blade, (1.7–)2–3.6(–4) times longer than blade;

blade ovate to oblong, 4–8(–9) mm wide, base cuneate.

petiole not differentiated from blade, about as long as blade;

blade linear to narrowly oblanceolate, 1.1–4(–5) mm wide, base attenuate.

2–6.

(2 or)3–7(–9).

lax to compact.

lax or slightly compact.

petals white, 3.8–6 × 1.2–2.2(–2.9) mm.

petals white, (3.4–)3.6–6 × 1–2 mm.

horizontal or slightly descending, forming an angle 80º or more with rachis.

horizontal or subhorizontal, forming an angle more than 70º with rachis.

often strongly winged, obovate to obdeltate, (4–)4.8–7(–8) × (3–)3.5–5.5(–6) mm, 1–2 times as long as wide, apex truncate to strongly emarginate;

style (0.8–)1–2 mm.

only slightly winged, obovate or, rarely, elliptic, (4–)5–8(–9.5) × (2.5–)2.7–4(–4.5) mm, 1–2 times as long as wide, apex obtuse, truncate, or emarginate;

style (0.5–)0.8–2(–2.5) mm.

2–4 per fruit.

2–8 per fruit.

= 14.

= 14, 28.