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.

branched, sometimes simple, to 8 cm;

branches 1 pair, from basal cauline nodes;

cauline internode lengths 1.5–5 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 obovate to ovate or oblong, 2–6.5 mm, margins crenate to crenate-serrate, teeth 1–3 pairs, apices obtuse.

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 or 3(–5);

proximal internode lengths 2–3 times bracts, distal shorter than bracts;

bracts green, often purple on veins abaxially and on surface adaxially, broader than leaves, obovate to ovate, length not more than 2 times width, 4–8 mm, surfaces sparsely glabrate or hirsute and hairs eglandular, teeth 3–5 pairs, as long as wide, apices acute, sometimes slightly aristate.

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, adaxial lip sometimes lilac, 4–6 mm, lips +/- equal.

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

oblong to narrowly elliptic, 4–6 mm, shorter than or equal to calyx, apex retuse.