Flora of North America species comparison

ascending to erect, (15–)30–70 cm, glabrous, not glaucous.

erect, 25–90 cm, glabrous, slightly glaucous or not.

basal and cauline, leathery or not, glabrous, not glaucous;

basal and proximal cauline 80–140(–180) × (10–)15–35(–40) mm, blade ovate to elliptic, base tapered, margins entire, apex obtuse to acute;

cauline 5–7 pairs, sessile, (28–)40–80(–110) × 6–30(–42) mm, blade ovate to lanceolate, base tapered to cordate-clasping, apex acute.

basal and cauline, not leathery, glabrous, not glaucous;

basal and proximal cauline 28–145 × 4–30 mm, blade oblong to oblanceolate or elliptic, base tapered, margins entire, apex acute;

cauline 2–4(or 5) pairs, sessile, rarely short-petiolate, 20–135 × 4–31 mm, blade lanceolate, proximals sometimes oblanceolate, base tapered to cordate-clasping, apex acute to acuminate.

continuous, sometimes interrupted proximally, cylindric, (3–)8–32 cm, axis glabrous, verticillasters 4–10(–16), cymes 2–4(–8)-flowered, 2 per node;

proximal bracts ovate to lanceolate, 12–80 × 2–35 mm;

peduncles and pedicels glabrous.

interrupted, secund, 10–56 cm, axis ± glandular-pubescent at least distally, verticillasters 4–12, cymes (1 or)2–6-flowered, 2 per node;

proximal bracts lanceolate, 10–58 × 10–85 mm;

peduncles and pedicels glandular-pubescent, sometimes sparsely so.

calyx lobes lanceolate, 5–8.5(–10) × 1–2 mm, glabrous;

corolla blue to violet, without nectar guides, ventricose, 18–22 mm, glabrous externally, glabrous internally, tube 6–9 mm, throat gradually inflated, not constricted at orifice, 7–10 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or slightly exserted, pollen sacs opposite, navicular, 1.2–1.9 mm, dehiscing incompletely, connective not splitting, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode: 13–15 mm, included, 0.5–0.9 mm diam., tip straight, distal 2–3 mm sparsely pilose, sometimes glabrous, hairs yellow, to 0.5 mm;

style 13–17 mm.

calyx lobes oblong-ovate, 3.5–5.8 × 1.2–2.1 mm, glandular-pubescent;

corolla blue to purple or violet, with faint reddish purple nectar guides, ventricose, 16–25 mm, ± glandular-pubescent externally, glabrous or sparsely glandular internally, tube 5–8 mm, throat gradually inflated, not constricted at orifice, 6–10 mm diam., rounded abaxially;

stamens included, pollen sacs divergent to nearly opposite, navicular, 0.8–1.4 mm, dehiscing incompletely, connective not splitting, sides sparsely to moderately hispid, hairs white or yellowish, to 0.2 mm, sutures papillate or denticulate, teeth to 0.1 mm;

staminode 9–11 mm, included, 0.4–0.5 mm diam., tip straight, distal 7–9 mm sparsely to moderately villous, hairs yellow, to 1 mm;

style 9–11 mm.

8–15 × 5–8 mm.

8–10 × 4–6 mm.

= 16.