Flora of North America species comparison

branched, rarely simple, to 30 cm;

branches 1–5 pairs, from middle and distal cauline nodes;

cauline internode length 0.5–2 times subtending leaves.

branched, sometimes simple, to 27(–37) cm;

branches 1–5 pairs, from distal cauline nodes;

cauline internode lengths 1–3 times subtending leaves.

blade narrowly oblong to ovate-oblong, 2–9(–12) mm, margins serrate, teeth 1–3 pairs, apices subacute to aristate.

blade suborbiculate, rhombic, or obovate, 3–12 mm, margins crenate-serrate to serrate, teeth 1–4 pairs, apices obtuse to acute.

beginning at node (5–)7–9(–11);

bracts green, sometimes purple adaxially, broader than leaves, oblong to ovate, length not more than 2 times width, 5–10 mm, surfaces glabrous or sparsely to densely hirsute and hairs eglandular, sometimes glandular-pubescent and hairs glandular, stalks 1- or 2-celled, 0.1–0.2 mm, teeth 4 or 5 pairs, longer than wide, apices acute, sometimes aristate.

sparsely spicate, not 4-angled, beginning at node 5–9;

proximal internode lengths 0.8–2.5 times bracts;

bracts green, broader than leaves, suborbiculate, length not more than 2 times width, 5–15 mm, surfaces hirsute and hairs eglandular, teeth 4 or 5(or 6) pairs, shorter than wide, apices obtuse or acute.

corolla white, usually suffused with lilac, 8–10 mm, abaxial lip exceeding adaxial.

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

narrowly oblong, 4.5–6 mm, apex truncate to retuse.

oval, (4–)5–6.5 mm, apex retuse to emarginate.