Flora of North America species comparison

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

ascending to erect, (9–)15–35 cm, glabrous or slightly retrorsely hairy proximally, glandular-pubescent distally.

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, not leathery, glabrous abaxially, retrorsely hairy adaxially, sometimes only along midvein;

basal and proximal cauline petiolate, 32–65(–80) × 1–6(–9) mm, blade lanceolate to linear, base tapered, margins entire or obscurely serrate, apex obtuse to acute;

cauline 3–7 pairs, sessile, 30–45(–70) × 1–5(–8) mm, blade lanceolate to linear, base tapered to slightly clasping, margins entire or obscurely serrate, apex 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, cylindric, (4–)6–15 cm, axis glandular-pubescent, verticillasters 3–6(–9), cymes (1 or)2–5-flowered, 2 per node;

proximal bracts lanceolate to linear, 7–20(–45) × 1–4(–8) 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 elliptic-lanceolate, 4–6 × 1–1.6 mm, glandular-pubescent;

corolla violet to blue or bluish lavender, with reddish purple nectar guides, weakly bilabiate, funnelform, 10–16 mm, glabrous or sparsely white-villous internally abaxially, tube 5–7 mm, throat gradually inflated, not constricted at orifice, 5–6 mm diam., rounded abaxially;

stamens included, pollen sacs opposite, explanate, 0.7–0.9 mm, dehiscing completely, sutures smooth;

staminode 6–8 mm, included, 0.5–0.9 mm diam., tip straight to recurved, distal 5–7 mm densely pilose, hairs yellow, to 0.8 mm;

style 4–5 mm.

7–11 × 14–6 mm.

7–10 × 3–5 mm.