Flora of North America species comparison

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

ascending to erect, 3–55(–70) cm, glabrous or ± retrorsely hairy, not 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.

basal and cauline, basal sometimes poorly developed, ± leathery or not, glabrous, puberulent, or retrorsely hairy;

basal and proximal cauline 9–90(–115) × 2–19 mm, blade spatulate to oblanceolate, lanceolate, or elliptic, base tapered, margins entire, apex rounded to obtuse or acute;

cauline 2–6 pairs, sessile or proximals sometimes short-petiolate, 6–85 × 1–17 mm, blade oblanceolate to spatulate, obovate, oblong, elliptic, lanceolate, or linear, base tapered to clasping, margins entire, apex rounded to obtuse or 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, 0.5–23 cm, axis glabrous or retrorsely hairy, verticillasters 1–8(–11), cymes 3–11-flowered, 2 per node;

proximal bracts lanceolate to linear, 10–50(–60) × 1–8(–16) mm, margins entire;

peduncles and pedicels erect, glabrous, puberulent, or retrorsely hairy.

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 ovate to obovate or lanceolate, 1.2–5(–5.5) × 0.5–2 mm, apex truncate, obtuse, acute, acuminate, cuspidate, caudate, or mucronate, glabrous or puberulent to retrorsely hairy;

corolla violet to blue or purple, with, sometimes without, reddish purple nectar guides, funnelform, 7–11 mm, glabrous externally, moderately white- or yellow-lanate internally abaxially, tube 2–3 mm, throat slightly inflated, 2–3 mm diam., 2-ridged abaxially;

stamens included, pollen sacs opposite, explanate, 0.3–0.6 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth or papillate;

staminode 4–6 mm, included, 0.2–0.3 mm diam., tip straight to slightly recurved, distal 0.5–1 mm pilose, hairs yellow or golden yellow, to 0.6 mm, rarely glabrous;

style 4–7 mm.

7–13 × 4–7 mm.

3–5 × 2–4 mm, glabrous.