Flora of North America species comparison

ascending to erect, 10–75 cm, villous.

erect, 20–65 cm, villous, rarely glabrous.

blade linear to lanceolate-ovate, 8–20 × 0.7–3 mm, base not clasping, truncate, margins entire, prominently revolute, apex acute to acuminate, surfaces villous, papillate, not distinctly punctate abaxially.

blade lanceolate to ovate, 8–20 × 4–13 mm, base clasping, rounded to subcordate, margins entire or serrate, not or slightly revolute, apex rounded to obtuse or acute, surfaces villous, rarely glabrous, papillate, distinctly punctate abaxially.

0–1 mm;

bracteoles 6–9 mm.

0–3(–5) mm;

bracteoles 6–9(–11) mm.

calyx lobes 3–7 × 0.5–1 mm;

corolla salverform, 7–16 mm, tube white, veins inconspicuous or pale purple, limb white.

calyx lobes 5–7 × 0.5–1.5 mm;

corolla tubular, 5–9 mm, tube yellow, veins bluish purple, limb white.

conic, 4–5 × 1.8–2.5 mm.

conic, 4–5 × 2–2.8 mm.

0.2–0.4 mm.

0.2–0.4 mm.

= 22.