Flora of North America species comparison

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

decumbent to ascending, 8–18(–25) cm, glabrous, 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.

basal and cauline, leathery or not, glabrous, not glaucous;

basal and proximal cauline (15–)30–65(–95) × 2–12(–20) mm, blade oblanceolate to elliptic, rarely spatulate, base tapered, margins entire, apex obtuse to acute, rarely rounded;

cauline 1–3 pairs, sessile, 20–70(–85) × 5–12 mm, blade oblanceolate to lanceolate or linear, base tapered to truncate, margins undulate, 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.

continuous, secund, (3–)5–19 cm, axis glabrous, verticillasters 2–6, cymes 2–4-flowered, 2 per node;

proximal bracts lanceolate, rarely elliptic or oblanceolate, 11–55 × 5–11 mm;

peduncles and pedicels glabrous or ± glandular, peduncles to 8 mm, pedicels 1–4 mm.

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 ovate to obovate, (3.5–)4–7 × 1.8–2(–3) mm, apex acuminate, sometimes caudate, glabrous or sparsely glandular;

corolla blue to violet or lavender, with or without faint purple nectar guides, ventricose, 14–22 mm, glabrous externally, glabrous internally, tube 5–8 mm, throat gradually inflated, not constricted at orifice, 4–6.5 mm diam., rounded abaxially;

stamens: longer pair reaching orifice, pollen sacs divergent, navicular, 1.2–1.7 mm, dehiscing incompletely, proximal 1/5 indehiscent, connective not splitting, sides pilose, hairs white, to 0.3 mm, sutures papillate or denticulate, teeth to 0.1 mm;

staminode 8–12 mm, included, 0.4–0.6 mm diam., tip straight, distal 5–6 mm sparsely pilose to villous, hairs yellow, to 0.5 mm;

style 9–12 mm.

8–10 × 5–7 mm.

5.5–8 × 3.5–4.5 mm.

= 16.