Flora of North America species comparison

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

ascending to erect, 4–25 cm, retrorsely ± hairy proximally, glandular-pubescent distally.

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, not leathery, glabrous abaxially, retrorsely hairy adaxially, usually only along midvein on distal caulines;

basal and proximal cauline petiolate, 12–73 × 2–9 mm, blade spatulate to oblanceolate, base tapered, margins entire or obscurely dentate, apex rounded to obtuse or acute;

cauline 3–5 pairs, sessile, 11–48 × 2–6 mm, blade lanceolate, base clasping, margins entire or dentate proximally, apex acute to acuminate.

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 or continuous, cylindric, 2–7 cm, axis glandular-pubescent, verticillasters 3–7, cymes 3–5-flowered, 2 per node;

proximal bracts lanceolate, 7–28 × 2–6 mm;

peduncles and pedicels glandular-pubescent.

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 lanceolate, 4.8–7.5 × 0.9–1.9 mm, glandular-pubescent;

corolla blue to bluish lavender or light purple, with purple nectar guides, funnelform, 14–20 mm, yellow-lanate internally abaxially, tube 4–6 mm, throat gradually inflated, not constricted at orifice, 5–7 mm diam., rounded or slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or exserted, pollen sacs parallel, navicular, 1.3–1.6 mm, dehiscing completely, sutures papillate;

staminode 7–9 mm, included or reaching orifice, 0.7–0.9 mm diam., tip straight to recurved, distal 5–6 mm sparsely to densely pilose, hairs golden yellow, to 2 mm;

style 8–10 mm.

4–6 × 4–5 mm.

6–10 × 3–5.5 mm.