Flora of North America species comparison

ascending to erect, (10–)20–65 cm, glabrous or sparsely retrorsely hairy distally, not glaucous.

ascending to erect, (10–)15–40 cm, glabrous, glaucous.

basal and cauline, not leathery, glabrous;

basal and proximal cauline 28–160(–235) × 8–25(–35) mm, blade oblanceolate to elliptic, base tapered, margins entire, apex obtuse to acute;

cauline 2–5 pairs, sessile or proximals short-petiolate, 10–130 × 3–35 mm, blade oblong to ovate or lanceolate, base truncate to clasping, margins entire, apex obtuse to acute.

cauline, opposite, glabrous, sometimes proximals retrorsely hairy, hairs pointed, usually glaucous;

cauline 3–8 pairs, short-petiolate or sessile, (6–)10–50 × (2–)4–9 mm, blade oblanceolate to oblong or lanceolate, base tapered to truncate or cordate, margins entire, apex obtuse to acute.

continuous or interrupted, cylindric, (1–)2–11(–27) cm, axis glabrous or sparsely retrorsely hairy, verticillasters 1–3(or 4), cymes (2–)4–13-flowered, 2 per node;

proximal bracts lanceolate, (5–)16–66 × (1–)4–19 mm, margins entire;

peduncles and pedicels erect, glabrous.

continuous, cylindric, 4–11 cm, axis glabrous, verticillasters 4 or 5, cymes 2–4-flowered, 2 per node;

proximal bracts ovate to oblong or lanceolate, 4–34 × 2–8 mm;

peduncles and pedicels ascending to erect, glabrous.

calyx lobes oblanceolate to lanceolate, (4–)5–9 × 1.4–3.5 mm, glabrous;

corolla blue to purple or violet, without nectar guides, tubular-funnelform, 14–21 mm, glabrous externally, moderately white- or yellowish pilose internally abaxially, tube 5–6 mm, throat slightly inflated to slightly ventricose, 4–7 mm diam., 2-ridged abaxially;

stamens included, pollen sacs divergent, saccate, 0.7–1.2 mm, dehiscing incompletely, distal 1/5–1/4 indehiscent, connective not splitting, sides glabrous, sutures papillate;

staminode 7–9 mm, included, 0.4–0.7 mm diam., tip straight to slightly recurved, distal 1–2 mm densely pilose to lanate, hairs golden yellow, to 1.4 mm, medial 2–4 mm sparsely lanate;

style 8–10 mm.

calyx lobes obovate to ovate or lanceolate, 3–5 × 1.5–2.5 mm, glabrous;

corolla blue to violet or purple, without nectar guides, ventricose, 14–20 mm, glabrous externally, glabrous internally, tube 4–5 mm, throat gradually inflated, 5–7 mm diam., 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1.4–1.8 mm, distal 1/3–1/2 indehiscent, sides hispidulous, hairs white, to 0.3 mm near filament attachment, sometimes sparsely so, sutures denticulate, teeth to 0.2 mm;

staminode 10–12 mm, included, 0.4–0.6 mm diam., glabrous or distal 0.5 mm sparsely pubescent, hairs whitish, to 0.2 mm;

style 11–14 mm.

5–7 × 3–4 mm, glabrous.

5–8 × 3.5–5 mm.

= 16, 32.

= 32.