Flora of North America species comparison

ascending, (8–)10–40 cm, glabrous or retrorsely hairy, not glaucous.

ascending to erect, 13–80 cm, glabrous or retrorsely hairy, hairs pointed, not glaucous.

essentially cauline, basal usually poorly developed, not leathery, glabrous;

basal and proximal cauline 10–40(–65) × 1–6 mm, blade oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 3–5 pairs, sessile or proximals short-petiolate, 12–60 × 2–5(–7) mm, blade oblanceolate to lanceolate or linear, base tapered, margins entire, apex acute.

cauline, opposite, glabrous, sometimes sparsely puberulent, hairs pointed, adaxially along midvein, not glaucous;

cauline 3–6 pairs, petiolate proximally or sessile distally, (12–)30–80 × (7–)15–50 mm, blade ovate-oblong proximally, ovate or lanceolate distally, base truncate to tapered proximally, cordate-clasping distally, margins serrate, apex obtuse to acute.

interrupted, cylindric, 1–14 cm, axis glabrous or ± puberulent at axils, verticillasters (1 or)2–6, cymes (1–)3–7-flowered, 2 per node;

proximal bracts lanceolate to linear, 8–30(–45) × 1–7 mm, margins entire;

peduncles and pedicels erect, glabrous.

continuous or interrupted, cylindric, 2–18(–28) cm, axis retrorsely hairy, verticillasters 1–3(–5), cymes 3–10-flowered, 2 per node;

proximal bracts ovate, 13–35(–80) × 6–16(–36) mm;

peduncles and pedicels ascending to erect, retrorsely hairy to puberulent.

calyx lobes obovate to ovate, 1–1.8 × 0.7–1.1 mm, apex truncate to cuspidate, glabrous;

corolla violet to blue or purple, without nectar guides, funnelform, 7–9(–11) mm, glabrous externally, moderately yellowish or white-pilose internally abaxially, tube 3–4 mm, throat slightly inflated, 2–3 mm diam., 2-ridged abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, explanate, 0.3–0.4(–0.5) mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth;

staminode 4–6 mm, included, 0.3–0.4 mm diam., tip straight, distal 0.5–1 mm sparsely to moderately pilose, hairs yellow, to 0.4 mm;

style 5–6 mm.

calyx lobes obovate to lanceolate, 3.5–11 × 1–3 mm, sparsely pubescent and ciliolate along margins, sometimes glabrate;

corolla blue to violet or purple, without nectar guides, weakly ventricose, 17–25(–28) mm, glabrous externally, glabrous or sparsely to densely white-lanate internally abaxially, tube 4–6 mm, throat gradually inflated, 5–8 mm diam., 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1.1–1.6 mm, distal 1/2–2/3 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 12–14 mm, exserted, 0.3–0.6 mm diam., distal 2–7 mm sparsely lanate, hairs yellow, to 1.5 mm;

style 10–16 mm.

2.5–4 × 1.8–2.5 mm, glabrous.

5–8 × 3–5.5 mm.

= 16, 32.

= 16.