Flora of North America species comparison

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

ascending to erect, 20–50 cm, retrorsely hairy.

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.

basal and cauline, not leathery, glabrous or glabrate, rarely basal retrorsely hairy along midvein;

basal and proximal cauline petiolate, 25–95 × 1–6 mm, blade linear, rarely lanceolate, base tapered, margins entire, apex acute;

cauline 6–11, sessile or proximals short-petiolate, 22–65(–95) × 1–10(–18) mm, blade lanceolate to linear, base tapered to clasping, margins entire or obscurely serrate, 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.

continuous or ± interrupted, cylindric, 3–16(–26) cm, axis glandular-pubescent, verticillasters 3–8, cymes 2–4-flowered, 2 per node;

proximal bracts lanceolate, 15–48 × 3–8 mm;

peduncles and pedicels glandular-pubescent.

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, 5–6.5 × 1.2–2 mm, glandular-pubescent;

corolla white, sometimes tinged pink or lavender, with reddish violet nectar guides, funnelform, 13–20 mm, glandular-pubescent and sparsely white-villous internally abaxially, tube 4–6 mm, throat gradually inflated, not constricted at orifice, 6–7 mm diam., rounded abaxially;

stamens included, pollen sacs opposite, explanate, 0.8–1 mm, dehiscing completely, sutures smooth;

staminode 10–14 mm, reaching orifice or exserted, 0.5–0.7 mm diam., tip straight to recurved, distal 3–7 mm sparsely pilose, hairs yellow, to 0.9 mm;

style 9–12 mm.

10–14 × 5–7 mm.

7–9 × 4.5–6 mm.

2–3 mm.