Flora of North America species comparison

ascending to erect, 13–40 cm, glabrous, glaucous.

ascending to erect, (10–)20–80 cm, retrorsely hairy, not glaucous.

persistent, 3–5 pairs, short-petiolate or sessile, 15–80 × (5–)11–28 mm, blade elliptic to ovate, oblanceolate, or spatulate, base tapered to clasping, margins entire or irregularly serrate to serrulate, apex rounded to obtuse or acute, glabrous, glaucous.

cauline, opposite, sometimes alternate, glabrous, not glaucous;

cauline (4–)7–10 pairs, sessile or proximals short-petiolate, 20–80 × 5–17 mm, blade elliptic to lanceolate or oblanceolate, base tapered, margins irregularly dentate or serrate, apex acute.

continuous, secund, 7–13 cm, axis glabrous, verticillasters 6–8, cymes 1- or 2-flowered;

proximal bracts ovate, 7–28 × 3–17 mm;

peduncles and pedicels ascending to erect, glabrous.

interrupted, cylindric, 3–25(–50) cm, axis glandular-pubescent, verticillasters 4–10, cymes 1–11(–18)-flowered, 1 or 2 per node;

proximal bracts lanceolate, rarely ovate, 9–45 × 2–16 mm;

peduncles and pedicels spreading to ascending, glandular-pubescent.

calyx lobes ovate to lanceolate, 5–7.5 × 2.2–3.5 mm, glabrous or inconspicuously glandular proximally;

corolla lilac to purple, essentially unlined internally but abaxial ridges usually lilac or white, not personate, funnelform, 33–38 mm, glabrous externally, sparsely to densely white-lanate internally abaxially, tube 6–8 mm, throat 7–10 mm diam.;

stamens included, pollen sacs 1.2–1.6 mm;

staminode 7–13 mm, essentially terete distally, 0.1 mm diam., tip straight, glabrous;

style 20–26 mm.

calyx lobes lanceolate, (2–)3–5.2 × 0.9–1.3 mm, glandular-pubescent;

corolla bluish lavender to violet or purple, with reddish purple nectar guides, funnelform, 13–19 mm, glandular-pubescent externally, glabrous internally or sparsely white-lanate abaxially, tube 5–6 mm, throat gradually inflated, 5–6 mm diam., rounded abaxially;

stamens included, filaments glabrous or sparsely white-pubescent distally, pollen sacs parallel, 0.9–1.3 mm, distal 1/2 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 9–11 mm, reaching orifice or barely exserted, 0.4–0.5 mm diam., distal 1–4 mm sparsely to moderately lanate, hairs white or yellowish, to 1.5 mm;

style 8–12 mm.

8–10 × 5–7 mm.

4–6 × 2.8–4.5 mm.

= 16.