Flora of North America species comparison

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

ascending to erect, 12–35 cm, glabrous.

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, glabrous;

basal and proximal cauline 20–110 × 14–40(–60) mm, blade spatulate to obovate, base tapered, apex rounded, mucronate, or retuse;

cauline 1–3 pairs, sessile, 20–58 × 8–23 mm, blade ovate to obovate or lanceolate, base tapered to cordate-clasping, apex obtuse to mucronate or retuse.

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.

continuous, sometimes interrupted, cylindric, 3–15 cm, axis glabrous, verticillasters 5–10, cymes 2–6-flowered;

proximal bracts ovate to lanceolate, 11–38 × 5–13 mm;

peduncles and pedicels glabrous, rarely obscurely glandular distally.

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 ovate to lanceolate, 4.5–8 × 1.8–2.4 mm, margins erose, broadly scarious, glabrous rarely obscurely glandular-pubescent proximally or along margins;

corolla blue to violet, rarely pink, with or without reddish or purple nectar guides, tubular-funnelform, 16–20(–22) mm, obscurely glandular externally or glabrous, sparsely white-villous internally abaxially or glabrous, tube 6–7 mm, throat gradually inflated, 5–6 mm diam., rounded or slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, 0.8–1.4 mm, sutures papillate;

staminode 8–10 mm, included or reaching orifice, 0.4–1 mm diam., tip strongly recurved, distal 3–4 mm moderately to densely pubescent, hairs golden yellow, to 0.7 mm;

style 8–10 mm.

8–15 × 5–8 mm.

8–12 × 6–8 mm.

= 16.