Flora of North America species comparison

(congested), elongated in fruit;

central rachis (3.7–)4.5–12(–16.5) cm.

(often strongly congested), not elongated in fruit;

central rachis (0.6–)1.2–7(–9) cm.

petals white, (5–)6–9(–10) mm;

gynophore stout, (0.5–)1–3 mm.

petals usually lavender, rarely white, (5–)6–8.5(–9.5) mm;

gynophore stout, 0.5–1(–3) mm.

horizontal to divaricate, straight, whitish, stout, (5–)6–9(–13) mm, moderately flattened at base.

horizontal, straight, not whitish, stout, 3–5(–6) mm, strongly flattened at base.

usually horizontal or divaricate, rarely divaricate-ascending, incurved, (1.4–)1.9–3.7(–4.5) cm.

horizontal or divaricate-ascending to ascending, straight or incurved, (0.9–)1.4–2.7(–3.4) cm.

= 26.