Flora of North America species comparison

20–40 cm, glabrous or glabrate.

ascending to erect, 30–57 cm, puberulent or retrorsely hairy, rarely glandular-pubescent distally, not glaucous.

10–20 pairs, 5–32 × 0.3–2 mm, blade base tapered, margins glabrous or scabrous, apex acuminate to mucronate.

deciduous, 3–6(or 7) pairs, petiolate or sessile, (6–)30–65(–95) × (5–)12–50 mm, blade ovate to oblong or lanceolate, base truncate to cordate, margins entire or ± denticulate, apex obtuse to acute, puberulent to pubescent abaxially, glabrate adaxially, glaucescent.

2–15(–23) cm, verticillasters (2–)5–10(–30), cymes 1- or 2-flowered;

proximal bracts linear, 3–22 × 0.2–1 mm;

peduncles and pedicels glabrous or scabrous.

interrupted, conic, 7–33 cm, axis sparsely to densely glandular-pubescent, verticillasters (2 or)3–5(–7), cymes 2–5(–7)-flowered;

proximal bracts ovate to lanceolate, 7–28(–72) × 3–17(–45) mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

calyx lobes ovate, 1–2.7 × 0.9–1.5 mm;

corolla lavender to violet, lined internally abaxially with reddish purple nectar guides, funnelform, 8–14 mm, glandular-pubescent internally in 2 lines on abaxial surface, sometimes also in sinuses of adaxial lobes, tube (1.5–)2–3 mm, throat 3–5 mm diam.;

stamens included or longer pair reaching orifice or barely exserted, pollen sacs 0.4–0.5 mm;

staminode 5–6 mm;

style 7–9 mm.

calyx lobes lanceolate, 3.8–6 × 1.1–2 mm, glandular-pubescent;

corolla lavender to purple or white, lined internally with violet nectar guides, personate, tubular-funnelform, 20–26 mm, glabrous or sparsely glandular-pubescent externally, moderately to densely white-villous internally, tube 7–8 mm, throat 6–8 mm diam.;

stamens included, pollen sacs 0.8–1.1 mm, glabrous;

staminode 4–5 mm, flattened distally, 0.1–0.2 mm diam., tip straight, distal 3–4 mm densely villous, hairs yellow, to 1 mm;

style 17–19 mm.

(4–)5–8 × 3–4 mm.

6–9 × 4–5 mm.

= 16.