Flora of North America species comparison

ascending to erect, 13–50(–70) cm, glabrous, glaucous.

ascending to erect, 5–18 cm, puberulent to retrorsely hairy, usually in lines proximally, not glaucous.

basal and cauline, basal sometimes few, opposite, glabrous, glaucous;

basal and proximal cauline 15–60 × 2–10(–20) mm, blade obovate to oblanceolate or linear, base tapered, margins entire, apex obtuse to acute;

cauline 3–20 pairs, sessile or proximals short-petiolate, 10–90 × 2–20 mm, blade elliptic to ovate, lanceolate, or linear, base tapered to clasping or cordate-clasping, margins entire, apex obtuse to acute.

deciduous, sometimes persistent, 2–6 pairs, distals seldom distinctly smaller than proximals, petiolate or sessile, (5–)10–42 × 4–15 mm, blade obovate to ovate, elliptic, or lanceolate, base tapered to clasping, margins ± crenulate-serrulate, apex obtuse to acute, glabrous, not glaucous.

interrupted or continuous, secund, (3–)6–31 cm, axis glabrous, verticillasters 3–10, cymes 1–3(or 4)-flowered, 2 per node;

proximal bracts ovate to lanceolate, 4–50 × 1–32 mm;

peduncles and pedicels ascending to erect, glabrous.

continuous, cylindric to ± secund, 1–4 cm, axis glandular-pubescent, verticillasters 2–4, cymes 1-flowered;

proximal bracts ovate to lanceolate, (4–)8–25 × 3–17 mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

calyx lobes ovate to oblong or obovate, 2.5–6.5 × 1.4–3.2 mm, glabrous;

corolla violet to blue or purple, with or without purple nectar guides, funnelform to ventricose, 18–35 mm, glabrous externally, glabrous internally, tube 7–9 mm, throat gradually inflated, 8–10 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or exserted, filaments glabrous, pollen sacs parallel, 1.8–3.5 mm, distal 1/3–1/2 indehiscent, sides hispidulous to pilose, hairs white, to 0.8 mm near filament attachment, sutures denticulate, teeth to 0.3 mm;

staminode 12–19 mm, included, 0.4–0.6 mm diam., glabrous;

style 16–22 mm.

calyx lobes lanceolate, 8–15 × (1.8–)2.5–3.7 mm, glandular-pubescent;

corolla violet to purple, unlined internally but abaxial ridges usually light violet to whitish, not personate, funnelform, 27–40 mm, glabrous externally, sparsely to moderately white-lanate internally abaxially, tube 5–8 mm, throat 8–11 mm diam.;

stamens included, pollen sacs 1.1–1.3 mm;

staminode 9–16 mm, flattened distally, 0.3–0.4 mm diam., tip straight, glabrous or distal 1–3(–13) mm sparsely to moderately villous, hairs yellow, to 1.3 mm;

style 25–28 mm.

7–11 × 14–6 mm.

8–11 × 6–8 mm.

= 16.