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 14 cm;

branches 1 or 2 pairs, from middle cauline nodes;

cauline internode lengths 2–3(–6) times leaves or, in very compact forms, lengths 0.5–1 times leaves.

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

blade oblanceolate to ovate, 2–9(–12) mm, margins crenate-dentate to serrate-dentate, teeth 1 or 2(–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.

beginning at node 2–4;

bracts green, sometimes purplish, broader than leaves, ovate to obovate, length not more than 2 times width, (2.5–)4–11(–14) mm, surfaces sparsely to moderately hirsute and glandular-pubescent and hairs glandular, stalks 1- or 2-celled, 0.1–0.2 mm, teeth 2–5 pairs, as long as or slightly longer than wide, apices subacute to acute, rarely aristate.

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

corolla white, sometimes tinged lilac, 5–8 mm, abaxial lip exceeding adaxial.

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

oblong to elliptic or obovate, 6–8 mm, apex retuse or emarginate.

= 44.