Flora of North America species comparison

ascending to erect, 13–50(–70) cm, glabrous, glaucous.

ascending to erect, 10–37 cm, pubescent to retrorsely hairy, sometimes glabrous proximally, glandular-pubescent distally, not glaucous.

basal and cauline, basal sometimes few, opposite, glabrous, glaucous;

basal and proximal cauline 15–60 × 2–10(–20) mm, blade obovate to oblanceolate or linear, base tapered, margins entire, apex obtuse to acute;

cauline 3–20 pairs, sessile or proximals short-petiolate, 10–90 × 2–20 mm, blade elliptic to ovate, lanceolate, or linear, base tapered to clasping or cordate-clasping, margins entire, apex obtuse to acute.

basal and cauline, or basal absent or reduced, not leathery, proximals glabrous or puberulent to scabrous, distals puberulent or scabrous to glandular-pubescent, not glaucous;

basal and proximal cauline 15–90 × 2–7(–8) mm, blade oblanceolate to linear, base tapered, margins entire, apex obtuse to acute;

cauline 6–10 pairs, short-petiolate or sessile, 9–68 × 1–5 mm, blade oblanceolate to linear, base tapered to truncate, apex obtuse to acute.

interrupted or continuous, secund, (3–)6–31 cm, axis glabrous, verticillasters 3–10, cymes 1–3(or 4)-flowered, 2 per node;

proximal bracts ovate to lanceolate, 4–50 × 1–32 mm;

peduncles and pedicels ascending to erect, glabrous.

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

proximal bracts lanceolate, proximals 8–43 × 1–3 mm;

peduncles and pedicels glandular-pubescent.

calyx lobes ovate to oblong or obovate, 2.5–6.5 × 1.4–3.2 mm, glabrous;

corolla violet to blue or purple, with or without purple nectar guides, funnelform to ventricose, 18–35 mm, glabrous externally, glabrous internally, tube 7–9 mm, throat gradually inflated, 8–10 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or exserted, filaments glabrous, pollen sacs parallel, 1.8–3.5 mm, distal 1/3–1/2 indehiscent, sides hispidulous to pilose, hairs white, to 0.8 mm near filament attachment, sutures denticulate, teeth to 0.3 mm;

staminode 12–19 mm, included, 0.4–0.6 mm diam., glabrous;

style 16–22 mm.

calyx lobes ovate to lanceolate, 3.5–7(–8) × 1.8–2.5 mm, glandular-pubescent;

corolla lavender to light blue or light violet, with faint reddish purple nectar guides, funnelform, (15–)16–18(–20) mm, glandular-pubescent externally, sparsely to moderately glandular-pubescent or glandular internally abaxially, tube 5.5–6.5 mm, throat gradually inflated, not constricted at orifice, 5–6 mm diam., rounded abaxially;

stamens: longer pair reaching orifice, pollen sacs divergent, navicular, 1–1.4 mm, dehiscing incompletely, proximal 1/5 indehiscent, connective not splitting, sides moderately hirsute, hairs white, to 0.7 mm, sutures denticulate, teeth to 0.1 mm;

staminode 8–10 mm, included, 0.6–0.7 mm diam., tip recurved, distal 1–3 mm sparsely pilose or lanate, hairs yellow or whitish, to 1 mm;

style 11–16 mm.

7–11 × 14–6 mm.

5–8 × 3.5–5 mm.