Flora of North America species comparison

20–40 cm, glabrous or glabrate.

ascending to erect, 40–90 cm, retrorsely hairy proximally, usually retrorsely hairy distally, not glaucous.

10–20 pairs, 5–32 × 0.3–2 mm, blade base tapered, margins glabrous or scabrous, apex acuminate to mucronate.

basal and cauline, basal sometimes withering by anthesis, not leathery, glabrate to puberulent;

basal and proximal cauline 40–150 × 10–26 mm, blade oval to elliptic, base tapered, margins entire or ± denticulate, apex rounded to obtuse;

cauline 7 or 8 pairs, sessile, 17–110 × 3–20 mm, blade oblanceolate to lanceolate, base tapered to clasping, margins entire or denticulate to serrulate, apex obtuse to acute.

2–15(–23) cm, verticillasters (2–)5–10(–30), cymes 1- or 2-flowered;

proximal bracts linear, 3–22 × 0.2–1 mm;

peduncles and pedicels glabrous or scabrous.

interrupted, conic, 11–22 cm, axis glabrous or sparsely glandular-pubescent, verticillasters 4–6, cymes (2–)5–8-flowered, 2 per node;

proximal bracts lanceolate, 10–15 × 3–5 mm, margins entire;

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

calyx lobes ovate, 1–2.7 × 0.9–1.5 mm;

corolla lavender to violet, lined internally abaxially with reddish purple nectar guides, funnelform, 8–14 mm, glandular-pubescent internally in 2 lines on abaxial surface, sometimes also in sinuses of adaxial lobes, tube (1.5–)2–3 mm, throat 3–5 mm diam.;

stamens included or longer pair reaching orifice or barely exserted, pollen sacs 0.4–0.5 mm;

staminode 5–6 mm;

style 7–9 mm.

calyx lobes ovate, 1.5–3.5(–4) × 0.9–1.5 mm, sparsely glandular-pubescent;

corolla white, sometimes tinged lavender or purple, with reddish purple nectar guides, ventricose, 15–20(–22) mm, glandular-pubescent externally, sparsely white-pubescent internally abaxially, tube 5–6 mm, throat abruptly inflated, 5–7 mm diam., slightly 2-ridged abaxially;

stamens included, pollen sacs opposite, navicular, 0.8–1 mm, dehiscing completely, connective splitting, sides glabrous, sometimes sparsely pubescent, hairs white, to 0.2 mm, sutures papillate;

staminode 8–10 mm, reaching orifice, 0.3–0.4 mm diam., tip straight to slightly recurved, distal 3–4 mm pilose, hairs yellowish, to 1 mm;

style 10–12 mm.

(4–)5–8 × 3–4 mm.

5–8 × 4–5 mm, glabrous.

= 16.