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, sometimes branched, to 30 cm;

branches 1 or 2 pairs, erect, from distal cauline nodes;

cauline internode lengths (1–)2–5 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 oblanceolate to broadly ovate, 2–6(–11) mm, margins crenate, teeth 1–3(–5) pairs, apices obtuse to subacute.

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 3 or 4(–6);

proximal internode lengths 0.8–3(–4) times bracts;

bracts green, often purplish adaxially, broader than leaves, ovate to obovate, length not more than 2 times width, 3–10 mm, base cuneate, surfaces sparsely hirsute and hairs eglandular or +/- densely, sometimes sparsely, glandular-pilose and hairs glandular, stalks sometimes flexuous, 3–6-celled, 0.2–0.6 mm, teeth 2–6 pairs, longer than wide, apices subacute to acute, rarely aristate, sinuses between teeth 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 to yellow, seldom with violet veins, 3–4 mm, lips +/- equal.

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

elliptic to oblong, (2.5–)5–6.5 mm, apex truncate to retuse.