Flora of North America species comparison

prostrate, decumbent, ascending, or erect, 2–14(–20) cm, pubescent to densely retrorsely hairy.

ascending to erect, (6–)26–77 cm, glabrous.

basal and cauline, not leathery, retrorsely hairy;

basal and proximal cauline petiolate, (5–)10–40(–55) × 4–14 mm, blade spatulate to oblanceolate, base tapered, margins entire, apex obtuse to acute, rarely rounded;

cauline 1–3 pairs, sessile, 12–38 × 3–7 mm, blade oblanceolate, not arcuate, base tapered, margins entire, apex obtuse to acute.

basal and cauline, glabrous;

basal and proximal cauline 32–150 × 9–40 mm, blade oblong to ovate, base tapered, apex obtuse to acute;

cauline 4–7 pairs, sessile, (11–)18–75 × (4–)10–38 mm, blade oblong to ovate, base clasping or cordate-clasping, apex obtuse to acute.

continuous, cylindric, 0.5–8(–10) cm, axis retrorsely hairy, verticillasters 1–4(–7), cymes 1- or 2(–4)-flowered, 1 or 2 per node;

proximal bracts oblanceolate to lanceolate, 12–34 × 2–8 mm;

peduncles and pedicels retrorsely hairy, sometimes sparsely glandular-pubescent.

interrupted, cylindric, (4–)14–37 cm, axis glabrous, verticillasters (3–)6–10(–14), cymes (1 or)2–8-flowered;

proximal bracts ovate to oblong, (6–)24–43 × (3–)16–28 mm;

peduncles and pedicels glabrous.

calyx lobes lanceolate, 4–6 × 1–1.9 mm, retrorsely hairy, sometimes sparsely glandular-pubescent;

corolla light blue to blue or violet, with, rarely without, faint blue or reddish purple nectar guides, funnelform, 14–20 mm, glandular-pubescent externally, sparsely white-lanate internally abaxially, tube 6–7 mm, throat gradually inflated, not constricted at orifice, 4–7 mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, navicular, 0.9–1.2 mm, dehiscing completely, sutures papillate;

staminode 7–10 mm, included or reaching orifice, 0.7–0.9 mm diam., tip recurved to coiled, distal 5–8 mm sparsely pubescent to lanate, hairs yellow or yellow-orange, to 1 mm;

style 10–12 mm.

calyx lobes ovate, 4–6.8 × 2–3 mm, margins erose, broadly scarious, glabrous;

corolla blue to violet or lavender, with reddish violet nectar guides, guides passing onto limb, tubular-funnelform to ventricose, 15–18 mm, glabrous externally, sparsely to moderately white-villous internally abaxially, rarely glabrous, tube 6–8 mm, throat gradually inflated, 7–10 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice, pollen sacs divergent to opposite, 1.1–1.3 mm, sutures papillate;

staminode 11–13 mm, reaching orifice or slightly exserted, 2–3 mm diam., tip recurved, prominently bifurcate, distal 5–7 mm densely villous, hairs yellowish or brownish yellow, to 1.5 mm;

style 10–12 mm.

4–6 × 4–5 mm.

11–13 × 5–7 mm.