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 20 cm;

branches 1 or 2 pairs, from basal cauline nodes;

cauline internode lengths 1.5–4 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 ovate to cuneate-obovate, 2–10 mm, margins crenate-dentate to serrate-dentate, teeth 1 or 2(–4) pairs, apices obtuse to acute.

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 2–5;

proximal internode lengths 2–4 times subtending bracts;

bracts green, sometimes purplish adaxially, broader than leaves, broadly ovate, length not more than 2 times width, (2–)4–13 mm, surfaces glabrous, moderately hirsute, or with bristles on veins and hairs eglandular, teeth 3–6 pairs, as long as or slightly longer than 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.

calyx lobes straight, apex acute;

corolla white, sometimes tinged lilac, 5–7 mm, lips +/- equal.

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

elliptic to obovate, 6–8 mm, equal to or slightly longer than calyx, apex emarginate.