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, rarely branched, to 16 cm;

branches 1 or 2 pairs, from basal cauline nodes;

cauline internode lengths (1–)2–6 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 ovate to orbiculate, 2–6 mm, margins incised-crenate, teeth 1–4(or 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.

beginning at node 2–5, proximal internode lengths 0.5–1.5(–2.5) times bracts;

bracts green, sometimes purplish adaxially, broader than leaves, ovate to obovate, length not more than 2 times width, 4–6(–8) mm, surfaces densely hirsute and hairs eglandular, teeth 4 or 5(or 6) pairs, as long as wide, apices acute.

calyx lobes straight, apex acute;

corolla white or cream, abaxial lip lilac or purple, adaxial lilac, 2.5–4.5 mm, lips equal.

corolla yellow, adaxial lip sometimes lilac, 4–5.5 mm, abaxial lip slightly exceeding adaxial.

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

oblong to elliptic, 4–5(–6) mm, apex slightly retuse.