Flora of North America species comparison

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

ascending to erect, 25–80 cm, retrorsely hairy, 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.

basal and cauline, not leathery, retrorsely hairy, not glaucous;

basal and proximal cauline (35–)50–160 × (5–)8–24 mm, blade oblanceolate to lanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 4–8 pairs, short-petiolate or sessile, 25–85(–125) × 6–15 mm, blade elliptic to lanceolate, base tapered to truncate, apex acute, rarely obtuse.

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.

interrupted or continuous, cylindric, 7–30 cm, axis retrorsely hairy proximally, mostly glandular-pubescent distally, verticillasters 3–7(–9), cymes 2–8(–10)-flowered, 2 per node;

proximal bracts lanceolate, 18–95 × 5–20 mm;

peduncles and pedicels retrorsely hairy.

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 ovate to lanceolate, (4.8–)6–11 × 2.2–3.5 mm, margins erose, glabrous or sparsely glandular, sometimes also sparsely puberulent;

corolla violet to blue, without nectar guides, ventricose, 25–35 mm, glabrous externally, glabrous internally, tube 7–10 mm, throat gradually inflated, not constricted at orifice, 7–11 mm diam., 2-ridged abaxially;

stamens included, pollen sacs divergent to nearly opposite, sigmoid, 1.8–2.2 mm, dehiscing incompletely, proximal 1/5–1/4 indehiscent, connective not splitting, sides sparsely hispid, hairs white, to 0.3 mm, sutures denticulate, teeth to 0.1 mm;

staminode 14–16 mm, included, 0.7–0.8 mm diam., tip straight, glabrous;

style (11–)15–22 mm.

7–11 × 14–6 mm.

8–11 × 5–6 mm.