Flora of North America species comparison

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

ascending to erect, 20–50 cm, retrorsely hairy.

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.

basal and cauline, not leathery, glabrous or glabrate, rarely basal retrorsely hairy along midvein;

basal and proximal cauline petiolate, 25–95 × 1–6 mm, blade linear, rarely lanceolate, base tapered, margins entire, apex acute;

cauline 6–11, sessile or proximals short-petiolate, 22–65(–95) × 1–10(–18) mm, blade lanceolate to linear, base tapered to clasping, margins entire or obscurely serrate, apex 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, 3–16(–26) cm, axis glandular-pubescent, verticillasters 3–8, cymes 2–4-flowered, 2 per node;

proximal bracts lanceolate, 15–48 × 3–8 mm;

peduncles and pedicels glandular-pubescent.

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 lanceolate, 5–6.5 × 1.2–2 mm, glandular-pubescent;

corolla white, sometimes tinged pink or lavender, with reddish violet nectar guides, funnelform, 13–20 mm, glandular-pubescent and sparsely white-villous internally abaxially, tube 4–6 mm, throat gradually inflated, not constricted at orifice, 6–7 mm diam., rounded abaxially;

stamens included, pollen sacs opposite, explanate, 0.8–1 mm, dehiscing completely, sutures smooth;

staminode 10–14 mm, reaching orifice or exserted, 0.5–0.7 mm diam., tip straight to recurved, distal 3–7 mm sparsely pilose, hairs yellow, to 0.9 mm;

style 9–12 mm.

2.5–4 × 1.8–2.5 mm, glabrous.

7–9 × 4.5–6 mm.

= 16, 32.