Flora of North America species comparison

ascending to erect, (9–)20–60 cm, glabrous or ± scabrous, especially distally.

ascending to erect, 45–150(–200) cm, glaucous.

basal and cauline, glabrous, sometimes scabrous;

basal and proximal cauline (14–)30–95 × 4–15(–24) mm, blade oblanceolate to elliptic, base tapered, apex obtuse to acute or mucronate;

cauline (2 or)3–6(or 7) pairs, sessile, 18–60(–85) × (4–)8–28 mm, blade ovate to lanceolate, base tapered to cordate-clasping, apex acute to acuminate.

glabrous, glaucous;

basal and proximal cauline 75–130 × 18–50 mm, blade ovate to elliptic, base tapered, margins entire, apex rounded to obtuse;

cauline 3–7 pairs, proximals usually short-petiolate, distal ones sessile, 24–145 × 12–70 mm, blade elliptic to ovate, base tapered to clasping, margins entire, apex obtuse to acute.

continuous or interrupted, cylindric, 6–25(–30) cm, axis glabrous, rarely scabrous or glutinous, verticillasters (5–)7–15, cymes (2–)4–8(–12)-flowered;

proximal bracts ovate to lanceolate, 14–60 × 9–30 mm, margins entire, apex obtuse to acuminate or caudate;

peduncles and pedicels glabrous or scabrous, sometimes also glutinous, peduncles to 4 mm.

interrupted, cylindric, 14–60(–80) cm, axis glabrous, verticillasters 7–20, cymes 2–8(–18)-flowered;

proximal bracts ovate to lanceolate, 15–33 × 4–20 mm;

peduncles and pedicels ascending to erect, glabrous or sparsely glandular-pubescent.

calyx lobes lanceolate, (3.2–)4.5–10 × 1.2–3.2(–3.8) mm, margins entire or erose, herbaceous or narrowly scarious, glabrous or scabrous proximally and, sometimes, along margins, sometimes also glutinous;

corolla blue to violet or purple, with reddish purple nectar guides, tubular-funnelform, 11–20 mm, glabrous externally, glabrous internally, tube 5–9 mm, throat gradually inflated, 4–6 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice to slightly exserted, pollen sacs opposite, navicular, 0.7–1.3(–1.5) mm, sutures papillate;

staminode 6–12 mm, reaching orifice, 0.6–1 mm diam., tip recurved, distal 1.5–3.5 mm densely pilose, hairs golden yellow, to 0.6 mm, hairs on proximal part of staminode mostly along margins;

style 8–15 mm.

calyx lobes elliptic to ovate, 3.5–5(–5.8) × 1.8–2.4 mm, margins entire or erose, sparsely glandular-pubescent;

corolla scarlet to orange, without nectar guides, bilaterally symmetric, bilabiate, tubular-funnelform, 20–28 mm, sparsely glandular-pubescent externally, glandular-pubescent internally, tube 4–7 mm, throat gradually inflated, 5–6 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice, pollen sacs explanate, 1–1.2 mm, sutures smooth;

staminode 14–20 mm, flattened distally, 0.3–0.6 mm diam., tip straight, glabrous;

style 16–20 mm.

7–13 × 4–7 mm.

7–12 × 5–8 mm.