Flora of North America species comparison

ascending to erect, (10–)15–57 cm, glabrous.

prostrate to ascending, to 1 cm (to 15 cm diam.), scabrous or puberulent.

basal and cauline, glabrous;

basal and proximal cauline 18–180 × 5–45(–53) mm, blade spatulate to lanceolate, base tapered, apex rounded to obtuse, acute, or mucronate;

cauline 2–5 pairs, short-petiolate or sessile, 15–80 × 7–32 mm, blade obovate, ovate, oblanceolate, or lanceolate, base tapered, clasping, or cordate-clasping, apex acute to rounded or mucronate.

essentially basal, not leathery, scabrous;

basal and proximal cauline sessile, 6–15(–22) × 0.6–1.3(–1.5) mm, blade linear, base tapered, margins entire, apex acute.

continuous or interrupted, cylindric, (5–)9–27 cm, axis glabrous, verticillasters (2–)4–10, cymes (1–)3–6-flowered;

proximal bracts ovate to lanceolate or oblong, 9–46 × 7–15 mm;

peduncles and pedicels glabrous, peduncles to 26 mm.

essentially absent, verticillasters 1, cymes 1(or 2)-flowered, 1 per node;

proximal bracts linear, 5–10 × 0.6–1 mm;

peduncles and pedicels glandular-pubescent and scabrous.

calyx lobes ovate to lanceolate, (2.5–)4–7 × 1.8–2.8 mm, margins entire or erose, broadly scarious, apex acute to acuminate or caudate, glabrous;

corolla blue to violet, sometimes lavender, with or without reddish violet nectar guides, tubular-funnelform to ventricose, 12–20 mm, glabrous externally, glabrous internally or sparsely white-villous abaxially, tube 4–6 mm, throat gradually inflated, 5–6 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, (0.7–)1–1.5 mm, sutures smooth or papillate;

staminode 8–12 mm, reaching orifice or slightly exserted, (0.2–)0.5–2 mm diam., tip recurved, prominently bifurcate, distal 4–8 mm densely villous, hairs yellow to golden yellow, to 2.5 mm;

style 11–15 mm.

calyx lobes lanceolate, 3.5–5.5 × 0.8–1.5 mm, glandular-pubescent and scabrous;

corolla lavender to blue or violet, without nectar guides, funnelform, 11–15 mm, yellowish or white-villous internally abaxially, tube 5–6 mm, throat gradually inflated, not constricted at orifice, 4.5–6 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or exserted, pollen sacs widely divergent or opposite, navicular, 0.7–0.9 mm, dehiscing completely, sutures papillate;

staminode 7–9 mm, exserted, 0.4–0.5 mm diam., tip straight to slightly recurved, distal 4–7 mm densely pilose, hairs orange, to 0.8 mm;

style 7–8 mm.

10–14 × 5–7 mm.

2.5–3.5 × 2.5–3 mm.

2–3 mm.