Flora of North America species comparison

simple or branched, to 23(–40) cm;

branches 1–4(or 5) pairs, ascending, from middle and distal cauline nodes;

cauline internode lengths 1–3(–5) times subtending leaves.

simple or branched, to 12(–15) cm;

branches 1–4(–6) pairs, from middle and distal cauline nodes;

cauline internode lengths 0.5–3(–5) times subtending leaves.

petiole 0–10(–13) mm;

blade long-orbiculate to triangular-ovate or oval, 2–10(–13) mm, margins crenate to incised-crenate, teeth 1–4(–6) pairs, apices obtuse to subacute.

blade suborbiculate, ovate, or oblong-ovate, 2–10(–14) mm, base round to cuneate, margins crenate to crenate-serrate, teeth 1–4(or 5) pairs, apices obtuse to subacute.

sparsely spicate, not 4-angled, beginning at node 3–7(–10);

proximal internode lengths 0.8–1.5 times bracts;

bracts green or suffused with purple, as broad as leaves, ovate or oval, length not more than 2 times width, 2–7 mm, base round, abaxial surface setulose on veins, adaxial puberulent and hairs eglandular, teeth 3–5(or 6) pairs, longer than wide, apices obtuse to acute, sinuses between teeth acute.

sparsely spicate, not 4-angled, beginning at node 4–7(–9);

proximal internode lengths 0.8–1.5(–2.5) times bracts;

bracts +/- strongly flushed purple adaxially or on both surfaces, broader or as broad as leaves, suborbiculate, broadly ovate, or oblong-ovate, length not more than 2 times width, 4–8(–10) mm, base round, truncate, or broadly cuneate, surfaces +/- densely hirsute and hairs eglandular, teeth 3–5 pairs, as long as wide, apices subacute to acute.

calyx lobes straight, apex acute;

corolla white or cream, abaxial lip lilac or purple, adaxial lilac, 2.5–4.5 mm, lips equal.

corolla white, adaxial lip sometimes lilac, (3.5–)4.5–6 mm, lips +/- equal.

oval to oblong or obovate, 2.5–5 mm, apex retuse to emarginate.

elliptic-oblong to oblong, 4–5.5(–6) mm, apex retuse to emarginate.

= 44 (Europe).