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 8(–12) cm;

branches 1 or 2 pairs, from basal cauline nodes;

cauline internode lengths 2–3 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 or orbiculate, 2–6(–8) mm, base cuneate, margins incised-crenate to incised-dentate, teeth 1–3(or 4) pairs, apices obtuse or acute.

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.

capitate, beginning at node 4 or 5;

proximal internode lengths 0.5–1(–1.5) times bracts;

bracts green or with slight bronze tinge or suffused with purple adaxially especially near margins, broader than leaves, ovate to obovate, length not more than 2 times width, 3–7 mm, base cuneate, surfaces hirsute and hairs eglandular, teeth 2–4 pairs, as long as wide, apices obtuse or acute, sinuses between teeth rounded or 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 falcate, apex obtuse;

corolla brownish purple, purple, or lilac with darker lines, abaxial side of tube and base of abaxial lip sometimes yellow, 3–4 mm, lips equal.

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

obovate or broadly elliptic, 4–4.5 mm, apex emarginate.