Flora of North America species comparison

ascending to erect, 13–50 cm, retrorsely hairy, hairs pointed, not glaucous.

ascending to erect, 15–65 cm, glabrous, not glaucous.

essentially cauline, opposite, retrorsely hairy, hairs pointed, sometimes glabrate, not glaucous;

cauline 5–8 pairs, petiolate or sessile, 22–80 × (1–)2–9 mm, blade oblanceolate to lanceolate or linear, base tapered, margins entire, apex obtuse to acute.

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

basal and proximal cauline 12–80 × 4–10(–15) mm, blade spatulate to oblanceolate or lanceolate, base tapered, margins entire, apex rounded to obtuse, or acute;

cauline 3 or 4 pairs, sessile, 12–50(–75) × 1–5 mm, blade oblanceolate to linear, base tapered, apex acute to acuminate.

interrupted, cylindric, 4–14 cm, axis glandular-pubescent, verticillasters (3 or)4–8(–12), cymes 1–5-flowered, 2 per node;

proximal bracts lanceolate, 5–40 × 1–4 mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

interrupted, secund, 2–25(–47) cm, axis glabrous, verticillasters 4–14, cymes 1- or 2(or 3)-flowered, 1 or 2 per node;

proximal bracts linear, 6–15(–68) × 1–2 mm;

peduncles and pedicels glabrous.

calyx lobes ovate to lanceolate, 3.8–7 × 1.4–2.6 mm, glandular-pubescent;

corolla blue to violet or purple, without nectar guides, funnelform, 15–25 mm, glandular-pubescent externally, glabrous internally, tube 6–8 mm, throat gradually inflated, 6–9 mm diam., slightly 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1.5–2 mm, distal 1/2 indehiscent, sides hispidulous, hairs white, to 0.5 mm near filament attachment, sutures denticulate, teeth to 0.2 mm;

staminode 12–15 mm, reaching orifice, 0.5–1 mm diam., glabrous;

style 13–17 mm.

calyx lobes ovate, 2.6–4 × 1.5–2.2 mm, glabrous;

corolla blue to lavender, with faint reddish purple nectar guides, ventricose, 18–23(–25) mm, glabrous externally, sparsely white-villous internally abaxially, tube 7–9 mm, throat gradually to abruptly inflated, not constricted at orifice, 7–10 mm diam., slightly 2-ridged abaxially;

stamens reaching orifice or longer pair slightly exserted, pollen sacs opposite, navicular, 1.2–1.8 mm, dehiscing incompletely, proximal 1/5 sometimes indehiscent, connective not splitting, sides lanate, rarely glabrous, hairs white, to 0.9 mm, sutures denticulate, teeth to 0.1 mm;

staminode 9–11 mm, reaching orifice, 0.5–0.7 mm diam., tip straight, glabrous;

style 12–17 mm.

(5.5–)7–9 × (3–)4–6 mm.

6.9–13 × 4.5–6.5 mm.