Flora of North America species comparison

ascending to erect, (6–)15–50 cm, retrorsely hairy, sometime glabrate, not glaucous.

ascending to erect, (5–)10–32 cm, glabrous or retrorsely hairy, not glaucous.

cauline, opposite, subopposite, or whorled, not leathery, glabrous or retrorsely hairy;

cauline 5–9 pairs, petiolate or sessile, (7–)10–50(–52) × (0.5–)1–20 mm, blade oblanceolate to ovate or spatulate, lanceolate to linear distally, base of proximals tapered, distals clasping, margins serrate to serrulate, rarely entire, apex rounded to obtuse, acute, or acuminate.

persistent, 4–9 pairs, distals distinctly to slightly smaller than proximals, short-petiolate or sessile, (5–)9–42 × 4–14(–18) mm, blade elliptic to obovate, base tapered, cuneate, or cordate-clasping, margins ± serrulate or serrulate-denticulate to serrate, apex rounded to obtuse or acute, glabrous, glaucous.

interrupted, cylindric, 6–30 cm, axis ± glandular-pubescent, verticillasters 5–11, cymes 1–6-flowered, 2 per node;

proximal bracts lanceolate to linear, 6–40 × 1–4 mm, margins entire or serrate to serrulate;

peduncles and pedicels ascending to erect, glandular-pubescent.

continuous, ± secund, 2–20 cm, axis glandular-pubescent, verticillasters 4–12, cymes 1-flowered;

proximal bracts ovate to lanceolate, 4–11(–20) × 2–8(–15) mm;

peduncles and pedicels ascending, glandular-pubescent.

calyx lobes ovate to lanceolate, 2.3–7 × 0.6–1.9 mm, glandular-pubescent;

corolla white to ochroleucous, sometimes tinged lavender, with brownish or purple nectar guides, funnelform, 9–18 mm, glabrate to glandular-pubescent externally, glandular-pubescent internally, sometimes glabrous or glabrate adaxially, tube 4–5 mm, throat slightly inflated, 2.5–5 mm diam., slightly 2-ridged abaxially;

stamens: longer pair slightly exserted, pollen sacs opposite, explanate, 0.4–0.8 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate;

staminode 8–9 mm, exserted, 0.2–0.3 mm diam., tip straight, glabrous or distal 0.5–2.5 mm sparsely pilose or villous, hairs yellow or white, to 0.5 mm;

style 7–10 mm.

calyx lobes lanceolate, 6–10 × 2–2.5 mm, glandular-pubescent;

corolla pink, red, scarlet, lavender, or purple, essentially unlined internally but abaxial ridges sometimes pink to whitish, not personate, funnelform, 22–35 mm, glabrous externally, moderately to densely white-lanate internally abaxially, tube 6–9 mm, throat 5–12 mm diam.;

stamens included or longer pair exserted, pollen sacs 0.8–1.7 mm;

staminode 8–14 mm, slightly flattened distally, 0.1–0.3 mm diam., tip straight, distal 2–8 mm pubescent to lanate, hairs white or yellowish, to 1 mm;

style 20–24 mm.

3–5 × 2.5–4 mm, glabrous.

(8–)10–13 × (4–)5–8 mm.