Flora of North America species comparison

ascending to erect, 25–55(–65) cm, retrorsely hairy and glandular-villous proximally, retrorsely hairy and glandular-pubescent distally, glandular hairs sometimes sparse, not glaucous.

ascending to erect, 8–25(–40) cm, densely retrorsely hairy, not glaucous.

basal and cauline, basal often withering by anthesis, not leathery, sparsely to densely pubescent, sometimes also with scattered glandular hairs, abaxially, sparsely pubescent adaxially;

basal and proximal cauline 20–120(–180) × 5–35(–40) mm, blade spatulate to obovate or ovate, base tapered, margins subentire or ± serrate or dentate, apex rounded to obtuse or acute;

cauline 4–8 pairs, sessile, 22–100 × 4–24 mm, blade ovate to lanceolate, base truncate to clasping, margins subentire or ± serrate or dentate, apex acute to acuminate.

basal and cauline, or basal absent or reduced, not leathery, retrorsely hairy or glabrous, sometimes glabrescent, not glaucous;

basal and proximal cauline 30–75(–100) × 2–18(–27) mm, blade oblanceolate to elliptic, base tapered, margins entire, apex obtuse to acute;

cauline 2–4 pairs, sessile, rarely short-petiolate, 22–77 × 3–10(–15) mm, blade lanceolate, proximals sometimes oblanceolate, base tapered to truncate, apex acute.

interrupted, conic, 5–26(–30) cm, axis sparsely to densely glandular-pubescent, verticillasters 3–8, cymes 2–8(–16)-flowered, 2 per node;

proximal bracts lanceolate, 7–72 × 2–22 mm, margins entire or ± dentate;

peduncles and pedicels ascending, sparsely to densely glandular-pubescent.

interrupted to ± continuous, cylindric, (3–)8–22(–28) cm, axis moderately to densely retrorsely hairy, verticillasters (5–)7–15, cymes (1 or)2- or 3-flowered, 2 per node;

proximal bracts lanceolate, 16–50(–63) × 3–10 mm;

peduncles and pedicels retrorsely hairy.

calyx lobes ovate to lanceolate, (2–)3–5 × 1–3 mm, sparsely glandular-pubescent;

corolla white, sometimes tinged lavender or blue, with reddish purple nectar guides, tubular to tubular-funnelform, 16–22 mm, glandular-pubescent externally, moderately whitish or yellowish lanate internally abaxially, tube 4–6 mm, throat slightly inflated, 4–7 mm diam., 2-ridged abaxially;

stamens included, pollen sacs opposite, navicular, (0.8–)1–1.2 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate;

staminode 10–12 mm, exserted, 0.2–0.3 mm diam., tip straight to slightly recurved, distal 8–9 mm moderately to densely villous, hairs yellow or golden yellow, to 1.5 mm;

style 12–14 mm.

calyx lobes ovate, (3–)4–6.8 × 1.7–2.8 mm, glabrous, rarely ± puberulent;

corolla blue to violet or purple, with violet nectar guides, funnelform, (12–)14–23(–28) mm, glabrous externally, glabrous internally, tube 6–8 mm, throat gradually inflated, not constricted at orifice, 6–9 mm diam., rounded abaxially;

stamens included, pollen sacs divergent, navicular, (1–)1.2–1.5(–1.8) mm, dehiscing incompletely, proximal 1/4 indehiscent, connective not splitting, sides sparsely to moderately hispid, hairs white or tan, to 0.4(–1) mm, sutures papillate or denticulate, teeth to 0.1 mm;

staminode 10–12 mm, included, 0.8–1.1 mm diam., tip recurved, distal 5–7 mm sparsely pilose, hairs yellow, to 1 mm;

style 12–15 mm.

5–7 × 3–5 mm, glabrous.

7–10 × 5–6 mm.

= 16.