Flora of North America species comparison

ascending to erect, 6–20(–25) cm, retrorsely hairy proximally, glabrous or retrorsely hairy distally, not glaucous.

erect, sometimes ascending, 30–63 cm, glabrous, not glaucous.

basal and cauline, not leathery, glabrous or ± puberulent;

basal and proximal cauline 15–65 × 1–5(–7) mm, blade narrowly oblanceolate to linear, base tapered, margins entire, apex obtuse to acute;

cauline 2–5 pairs, short-petiolate or sessile, 7–33 × 1–3 mm, blade lanceolate to linear, base sessile to clasping, margins entire, apex obtuse to acute.

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

basal and proximal cauline 30–90(–116) × 5–26 mm, blade oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 6–12 pairs, sessile, 25–113 × 3–13 mm, blade lanceolate to linear, base tapered to truncate, apex obtuse to acute.

interrupted, cylindric, 2–11 cm, axis glandular-pubescent, sometimes also retrorsely hairy, verticillasters 2–6, cymes 1–5-flowered, 2 per node;

proximal bracts lanceolate to linear, 9–32 × 1–6 mm, margins entire;

peduncles and pedicels erect, ± glandular-pubescent.

continuous, sometimes interrupted, secund, 16–30 cm, axis glabrous, verticillasters 7–11, cymes 1–4-flowered, (1 or)2 per node;

proximal bracts lanceolate to linear, 10–72 × 1–12 mm;

peduncles and pedicels glabrous.

calyx lobes ovate to lanceolate, 2.2–4.6 × 1–2.4 mm, glandular-pubescent;

corolla blue to violet, with reddish purple guides, funnelform, 11–17 mm, glandular-pubescent externally, moderately whitish lanate internally abaxially, tube 3–4 mm, throat gradually inflated, 4–6 mm diam., 2-ridged abaxially;

stamens included, pollen sacs divergent to opposite, subexplanate to explanate, 0.6–0.8 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate;

staminode 7–8 mm, reaching orifice, 0.2–0.4 mm diam., tip recurved, distal 0.5–1 mm densely pilose, hairs golden yellow, to 0.8 mm;

style 9–10 mm.

calyx lobes lanceolate to elliptic, 3–5 × 2–2.6 mm, glabrous;

corolla lavender to violet, with reddish purple nectar guides, ventricose, 26–34 mm, glabrous externally, sparsely to densely white-villous internally abaxially, tube 7–8 mm, throat gradually to abruptly inflated, not constricted at orifice, 7–10 mm diam., rounded abaxially;

stamens: longer pair exserted, pollen sacs opposite, navicular, 1.4–1.9 mm, dehiscing completely, sides glabrous, sutures smooth or papillate;

staminode 14–16 mm, reaching orifice or exserted, 1–1.2 mm diam., tip straight, glabrous;

style 14–18 mm.

5–7 × 4–5 mm, glabrous.

9–14 × 5–6 mm.

= 16.