Flora of North America species comparison

ascending to erect, 30–150 cm, glabrous or retrorsely hairy, hairs pointed, rarely glaucous.

decumbent to ascending, (4–)7–18(–30) cm, glabrous.

essentially cauline, basal absent or essentially so, opposite, glabrous or retrorsely hairy to puberulent, hairs pointed, rarely glaucous;

cauline 5–11 pairs, petiolate or sessile, 10–100 × 0.5–12 mm, blade oblanceolate to lanceolate or linear, base tapered to clasping, margins entire, apex acute.

basal and cauline, glabrous;

basal and proximal cauline 21–50(–70) × 4–11(–17) mm, blade spatulate to oblanceolate, base tapered, apex rounded to obtuse, acute, or mucronate;

cauline 2–5 pairs, short-petiolate or sessile, 21–58 × 3–11 mm, blade lanceolate to oblanceolate, base tapered to clasping, apex obtuse to acute or mucronate.

interrupted or continuous, cylindric, (6–)10–32 cm, axis glabrous or retrorsely hairy, verticillasters (3–)5–14, cymes 1(–3)-flowered, (1 or)2 per node;

proximal bracts lanceolate to linear, 5–65 × 0.5–5 mm;

peduncles and pedicels ascending to erect, glabrous or retrorsely hairy.

continuous, cylindric, 3–14 cm, axis glabrous, verticillasters 4–9, cymes (1 or)2–6-flowered;

proximal bracts oblanceolate to lanceolate, 13–60 × 5–16 mm;

peduncles and pedicels glabrous.

calyx lobes obovate to oblanceolate or ovate to lanceolate, 2.6–6(–7) × 1.3–3.3 mm, glabrous or puberulent;

corolla blue to violet or purple, without nectar guides, ventricose to ventricose-ampliate, 24–38 mm, glabrous externally, glabrous internally, tube 7–10 mm, throat gradually inflated, 8–11 mm diam., 2-ridged abaxially;

stamens included or longer pair reaching orifice or slightly exserted, filaments glabrous, pollen sacs parallel, 2.2–3 mm, distal 1/3–1/2 indehiscent, sides pubescent to lanate, hairs white, to 0.8 mm near filament attachment, sutures denticulate, teeth to 0.2 mm;

staminode 16–19 mm, included, 0.4–0.6 mm diam., glabrous;

style 18–27 mm.

calyx lobes lanceolate, 4–6.2(–7.5) × 0.9–1.6 mm, margins entire or erose, narrowly scarious, glabrous;

corolla blue to violet, with reddish purple nectar guides, tubular-funnelform, (10–)12–15 mm, glabrous externally, sparsely white-pubescent internally abaxially or glabrous, tube 4–5 mm, throat gradually inflated, 4.5–5.5 mm diam., rounded abaxially;

stamens included, pollen sacs divergent, 0.7–0.8 mm, sutures smooth or obscurely papillate;

staminode 6–8 mm, included, 0.8–1 mm diam., tip recurved, distal 3–4 mm densely pubescent, hairs golden yellow, to 1 mm;

style 8–10 mm.

6–9 × 4–5 mm.

6–10(–12) × 5–6 mm.

= 16, 32.