Flora of North America species comparison

ascending to erect, 30–150 cm, glabrous or retrorsely hairy, hairs pointed, rarely glaucous.

decumbent to ascending, 8–26 cm, glabrous, not glaucous.

essentially cauline, basal absent or essentially so, opposite, glabrous or retrorsely hairy to puberulent, hairs pointed, rarely glaucous;

cauline 5–11 pairs, petiolate or sessile, 10–100 × 0.5–12 mm, blade oblanceolate to lanceolate or linear, base tapered to clasping, margins entire, apex acute.

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

basal and proximal cauline (15–)20–110 × (3–)6–14(–25) mm, blade oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline (1 or)2 or 3 pairs, sessile or proximals short-petiolate, 13–55 × 5–14 mm, blade oblanceolate to lanceolate, base tapered, apex obtuse to acute.

interrupted or continuous, cylindric, (6–)10–32 cm, axis glabrous or retrorsely hairy, verticillasters (3–)5–14, cymes 1(–3)-flowered, (1 or)2 per node;

proximal bracts lanceolate to linear, 5–65 × 0.5–5 mm;

peduncles and pedicels ascending to erect, glabrous or retrorsely hairy.

continuous, cylindric to secund, 2–13 cm, axis glabrous or glandular-pubescent, verticillasters 2 or 3(–5), cymes 1–7-flowered, 2 per node;

proximal bracts lanceolate to oblong, 10–45 × 4–18 mm, apex acute;

peduncles and pedicels glabrous or ± glandular-pubescent, peduncles to 7 mm, pedicels 1–4 mm.

calyx lobes obovate to oblanceolate or ovate to lanceolate, 2.6–6(–7) × 1.3–3.3 mm, glabrous or puberulent;

corolla blue to violet or purple, without nectar guides, ventricose to ventricose-ampliate, 24–38 mm, glabrous externally, glabrous internally, tube 7–10 mm, throat gradually inflated, 8–11 mm diam., 2-ridged abaxially;

stamens included or longer pair reaching orifice or slightly exserted, filaments glabrous, pollen sacs parallel, 2.2–3 mm, distal 1/3–1/2 indehiscent, sides pubescent to lanate, hairs white, to 0.8 mm near filament attachment, sutures denticulate, teeth to 0.2 mm;

staminode 16–19 mm, included, 0.4–0.6 mm diam., glabrous;

style 18–27 mm.

calyx lobes lanceolate, 5.5–8 × 1.5–2 mm, margins erose, glabrous or ± glandular-pubescent;

corolla blue to violet, without nectar guides, ventricose, 18–25 mm, glabrous externally, glabrous internally, tube 5–7 mm, throat gradually inflated, not constricted at orifice, 6–10 mm diam., 2-ridged abaxially;

stamens: longer pair exserted, pollen sacs divergent, navicular, 1.3–1.8 mm, dehiscing incompletely, proximal 1/3 indehiscent, connective not splitting, sides moderately pubescent to villous, hairs white, to 0.7 mm, sutures denticulate, teeth to 0.1 mm;

staminode 10–12 mm, included, 0.5–0.6 mm diam., tip straight, glabrous or distal 1–3 mm sparsely pilose, hairs yellow or white, to 0.5 mm;

style 14–17 mm.

6–9 × 4–5 mm.

5–7.5 × 4–5 mm.

= 16, 32.

= 16.