Flora of North America species comparison

ascending to erect, (8–)15–50 cm, retrorsely hairy, not glaucous.

ascending to erect, 2–6(–8) cm, pubescent or densely retrorsely hairy.

basal and cauline, basal sometimes absent, not leathery, retrorsely hairy, not glaucous;

basal and proximal cauline 16–60(–80) × 1–3(–4) mm, blade linear, base tapered, margins entire, apex obtuse to acute;

cauline 6–11 pairs, sessile, (2–)10–75 × (0.2–)0.5–3 mm, blade linear, base tapered, apex acuminate.

basal and cauline, not leathery, retrorsely hairy;

basal and proximal cauline petiolate, 8–30 × 2–9 mm, blade spatulate to oblanceolate, base tapered, margins entire, apex rounded to obtuse or acute;

cauline (0 or)1–3 pairs, sessile, 14–23 × 1–4 mm, blade oblanceolate to linear, not arcuate, base tapered, margins entire, apex acute.

interrupted, secund, (2–)5–25 cm, axis glabrous or puberulent, verticillasters 3–10, cymes 1- or 2-flowered, 1 or 2 per node;

proximal bracts linear, 4–30 × 0.5–2 mm;

peduncles and pedicels glabrous or puberulent.

continuous, cylindric, 1–4 cm, axis puberulent or retrorsely hairy, verticillasters 1–5, cymes (1 or)2-flowered, 2 per node;

proximal bracts oblanceolate to lanceolate or linear, 13–24 × 1–4 mm;

peduncles and pedicels retrorsely hairy, sometimes sparsely glandular-pubescent.

calyx lobes ovate, sometimes obovate or truncate, 3–4.5(–5) × 1.5–2.4 mm, glabrous or sparsely puberulent;

corolla bluish violet to violet, lavender, or purple, with reddish purple nectar guides, ventricose, 17–23 mm, glabrous externally, glabrous internally, tube 5–7 mm, throat gradually inflated, slightly constricted at orifice, (5–)7–9 mm diam., rounded abaxially;

stamens: longer pair exserted, pollen sacs opposite, navicular, 1.2–1.5 mm, dehiscing incompletely, connective not splitting, sides glabrous, sutures papillate;

staminode 12–14 mm, exserted, 0.5–0.8 mm diam., tip straight to recurved, glabrous;

style 13–17 mm.

calyx lobes lanceolate, 5–8.5 × 1–2.1 mm, retrorsely hairy, sometimes sparsely glandular-pubescent;

corolla light blue to blue, lavender, or violet, without nectar guides, funnelform, 14–20 mm, glabrous or sparsely white-lanate internally abaxially, tube 6–8 mm, throat gradually inflated, not constricted at orifice, 4–7 mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, navicular, 0.9–1.2 mm, dehiscing completely, sutures papillate;

staminode 9–11 mm, included or reaching orifice, 0.5–1.1 mm diam., tip straight to recurved, distal 5–7 mm moderately pubescent to lanate, hairs yellow or yellow-orange, to 1.5 mm;

style 9–12 mm.

7–14 × 4–5 mm.

4–6.5 × 4–5 mm.