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.

simple or branched, to 25(–35) cm;

branches 1–5(or 6) pairs, from proximal, middle, or distal cauline nodes;

cauline internode lengths 2–4 times subtending leaves.

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

blade usually broadly ovate, 3–16 mm, margins serrate, teeth 1–6 pairs, apices 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.

beginning at node 3–5;

bracts green or purplish adaxially, broader than leaves, broadly ovate or deltate, length not more than 2 times width, (4–)5–9(–11) mm, surfaces glabrous or setose and hairs eglandular, sometimes pubescent and hairs glandular, stalks 1- or 2-celled, 0.1–0.2 mm, teeth 3–6 pairs, as long as or much longer than wide, apices acute to acuminate.

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

corolla white, sometimes lilac, adaxial lip lilac, 6–11(–13) mm, abaxial lip exceeding adaxial.

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

oblong to elliptic or obovate, 4.5–8 mm, apex truncate to retuse.