Flora of North America species comparison

ascending to erect, (10–)20–80 cm, retrorsely hairy, not glaucous.

ascending to erect, (16–)20–60 cm, glabrous or ± puberulent proximally, ± glaucous.

cauline, opposite, sometimes alternate, glabrous, not glaucous;

cauline (4–)7–10 pairs, sessile or proximals short-petiolate, 20–80 × 5–17 mm, blade elliptic to lanceolate or oblanceolate, base tapered, margins irregularly dentate or serrate, apex acute.

basal and cauline, ± leathery or not, glabrous or proximals puberulent proximally or along midveins, ± glaucous;

basal and proximal cauline (30–)50–95 × 10–15(–28) mm, blade spatulate to oblanceolate, base tapered, margins entire, usually undulate, apex rounded to obtuse;

cauline 2–4 pairs, sessile, 20–73 × 4–15 mm, blade lanceolate to elliptic, base truncate to clasping, margins crisped or undulate, apex acute.

interrupted, cylindric, 3–25(–50) cm, axis glandular-pubescent, verticillasters 4–10, cymes 1–11(–18)-flowered, 1 or 2 per node;

proximal bracts lanceolate, rarely ovate, 9–45 × 2–16 mm;

peduncles and pedicels spreading to ascending, glandular-pubescent.

interrupted, secund to subsecund, (4–)8–31 cm, axis glabrous, verticillasters 5–9(–12), cymes (1 or)2–5-flowered, 2 per node;

proximal bracts ovate to lanceolate, 15–50 × 3–23 mm;

peduncles and pedicels glabrous, peduncles to 18 mm, pedicels 1–7 mm.

calyx lobes lanceolate, (2–)3–5.2 × 0.9–1.3 mm, glandular-pubescent;

corolla bluish lavender to violet or purple, with reddish purple nectar guides, funnelform, 13–19 mm, glandular-pubescent externally, glabrous internally or sparsely white-lanate abaxially, tube 5–6 mm, throat gradually inflated, 5–6 mm diam., rounded abaxially;

stamens included, filaments glabrous or sparsely white-pubescent distally, pollen sacs parallel, 0.9–1.3 mm, distal 1/2 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 9–11 mm, reaching orifice or barely exserted, 0.4–0.5 mm diam., distal 1–4 mm sparsely to moderately lanate, hairs white or yellowish, to 1.5 mm;

style 8–12 mm.

calyx lobes ovate, 3.5–4.5 × 1.4–2 mm, apex acute to acuminate, glabrous;

corolla blue to violet, with violet nectar guides, funnelform to weakly ventricose, 14–18(–20) mm, glabrous or ± glandular externally, glabrous internally, tube 5–8 mm, throat gradually inflated, not constricted at orifice, 5–7 mm diam., rounded abaxially;

stamens: longer pair reaching orifice, pollen sacs divergent, navicular-sigmoid, 1.2–1.7 mm, dehiscing incompletely, proximal 1/4 indehiscent, connective not splitting, sides sparsely to moderately pilose, hairs white, to 0.5(–0.7) mm, sutures denticulate, teeth to 0.1 mm;

staminode: 9–11 mm, reaching orifice, 0.2–0.4 mm diam., tip straight, distal 2–6 mm sparsely pilose, hairs golden yellow, to 0.6 mm;

style 9–12 mm.

4–6 × 2.8–4.5 mm.

6–10 × 4–5 mm.