Flora of North America species comparison

ascending to erect, 6–40 cm, retrorsely hairy, not glaucous.

ascending to erect, 25–65(–70) cm, puberulent or retrorsely hairy, rarely also glandular-pubescent distally, not glaucous.

basal and cauline, alternate or mostly opposite, not leathery, retrorsely hairy;

basal and proximal cauline 10–50(–70) × 1–4 mm, blade spatulate to oblanceolate or linear, base tapered, margins entire, revolute, apex rounded to obtuse or acute;

cauline 8–12 pairs (or 13–25 leaves when alternate), sessile, 7–35 × 1–3 mm, blade oblanceolate to linear, base tapered, margins entire, apex acute.

basal and cauline, basal often withering by anthesis, not leathery, glabrous or retrorsely hairy to puberulent;

basal and proximal cauline 25–90 × 8–25 mm, blade spatulate, oblanceolate, or ovate, base tapered, rarely truncate, margins subentire or serrate to dentate, apex rounded to obtuse or acute;

cauline (3–)5–7 pairs, short-petiolate or sessile, (20–)30–90(–110) × (2–)5–22 mm, blade lanceolate to oblanceolate, base tapered to cordate-clasping, margins subentire or serrate to dentate, apex acute.

interrupted, cylindric to secund, 2–12 cm, axis glandular-pubescent and retrorsely hairy, verticillasters 3–12, cymes 1(or 2)-flowered, 1 or 2 per node;

proximal bracts lanceolate to linear, 5–18 × 0.5–3 mm, margins entire;

peduncles and pedicels erect, glandular-pubescent and/or retrorsely hairy.

interrupted, conic, 5–26(–32) cm, axis retrorsely hairy and ± glandular-pubescent, verticillasters 3–7, cymes 2–6-flowered, branches of each cyme usually elongating, of equal length, 2 per node;

proximal bracts lanceolate, 4–28 × 1–6 mm, margins entire or ± serrulate;

peduncles and pedicels spreading or ascending, puberulent or retrorsely hairy and, usually, glandular-pubescent.

calyx lobes lanceolate, 5–8.5 × 1.7–2.7 mm, puberulent and glandular-pubescent;

corolla violet to blue or purple, with or without reddish nectar guides, funnelform, 15–22 mm, glandular-pubescent externally, glandular-pubescent internally, tube 3–4 mm, throat gradually inflated, 5–6 mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, navicular to subexplanate, 0.8–1 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth;

staminode 8–11 mm, included, 0.4–0.6 mm diam., tip straight, distal 3–5 mm sparsely to densely pubescent, hairs yellow, to 1 mm;

style 10–12 mm.

calyx lobes ovate to lanceolate, 2.5–5.5 × 2–3 mm, sparsely puberulent and glandular-pubescent;

corolla white to light lavender, sometimes tinged pink, with reddish purple nectar guides, tubular, 20–28(–30) mm, glandular-pubescent externally, moderately white- or yellow-lanate internally abaxially, tube 5–7 mm, throat abruptly inflated, 4–8 mm diam., 2-ridged abaxially;

stamens included, pollen sacs opposite, navicular, 1–1.3 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate;

staminode 15–20 mm, exserted, 0.6–0.8 mm diam., tip straight to slightly recurved, distal 8–10 mm densely pilose, hairs yellow, to 1.5 mm;

style 14–20 mm.

5–9 × 3–5.3 mm, glabrous.

8–10 × 6–7 mm, glabrous.

= 16.

= 16.