Flora of North America species comparison

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

ascending to erect, 10–40 cm, moderately to densely retrorsely hairy, not glaucous.

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.

basal and cauline, opposite, rarely alternate, not leathery, ± retrorsely hairy;

basal and proximal cauline 10–25(–65) × 1–2(–6) mm, blade linear, base tapered, margins entire, apex acute, rarely obtuse;

cauline 7–10 pairs, sessile or proximals sometimes petiolate, 4–45 × 1–4(–6) mm, blade linear, rarely lanceolate distally, base truncate or clasping, margins entire, usually revolute, apex acute.

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.

interrupted, cylindric, 3–18 cm, axis retrorsely hairy and glandular-pubescent, sometimes only retrorsely hairy, verticillasters 3–7, cymes 1- or 2(or 3)-flowered, 2 per node;

proximal bracts lanceolate to linear, 5–24 × 1–2 mm, margins entire;

peduncles and pedicels ascending to erect, retrorsely hairy and glandular-pubescent.

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.

calyx lobes broadly lanceolate, 4–6.5 × 1.5–3 mm, glandular-pubescent;

corolla blue to violet or purple, with violet nectar guides, funnelform, (13–)15–22 mm, glandular-pubescent externally, glabrous internally, tube 5–6 mm, throat gradually inflated, 4–6(–7) mm diam., slightly 2-ridged abaxially;

stamens included, pollen sacs opposite, navicular, 1.1–1.3 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate;

staminode 13–17 mm, exserted, 0.5–0.9 mm diam., tip straight, distal 7–9 mm sparsely yellow-pubescent, hairs to 1 mm;

style 11–13 mm.

8–11 × 6–8 mm.

6–8 × 3–5 mm, glabrous.

= 16.