Flora of North America species comparison

ascending to erect, (15–)35–60 cm, retrorsely hairy, hairs pointed, at least proximally, not glaucous.

ascending to erect, 6–30 cm, pubescent, sometimes retrorsely hairy proximally and glandular-pubescent distally, not glaucous.

cauline, opposite, glabrous, glaucous;

cauline 4–8 pairs, short-petiolate or sessile, (15–)20–60 × (2–)6–13(–20) mm, blade elliptic or proximals oblanceolate to lanceolate, base tapered, margins entire, apex obtuse to acute.

deciduous, 4–7 pairs, distals seldom distinctly smaller than proximals, short-petiolate or sessile, 9–35(–56) × 7–17(–28) mm, blade obovate to oblanceolate, ovate, lanceolate, or elliptic, base tapered, cuneate, or cordate-clasping, margins entire, subentire, serrate, or dentate, apex obtuse to acute, glabrous, puberulent, or puberulent and glandular-pubescent, glaucous or not.

continuous, cylindric, 5–22 cm, axis glabrous or retrorsely hairy, verticillasters 4–8(–11), cymes 1- or 2(–4)-flowered, 2 per node;

proximal bracts lanceolate to elliptic, 8–66 × 1–13 mm;

peduncles and pedicels ascending to erect, peduncles glabrous or sparsely retrorsely hairy, pedicels papillate or glandular distally.

continuous, secund, 1–7 cm, axis sparsely to moderately glandular-pubescent, sometimes also pubescent proximally, verticillasters 1–5, cymes 1-flowered;

proximal bracts ovate to lanceolate, 6–28 × 3–22 mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

calyx lobes lanceolate, 4–6(–7) × 1.4–2.6 mm, glabrous;

corolla lavender to light violet or violet, with or without faint lavender nectar guides, ventricose-ampliate, (20–)22–25(–30) mm, glabrous externally, glabrous internally, tube 6–8 mm, throat gradually inflated, 7–9 mm diam., 2-ridged abaxially;

stamens: longer pair exserted, filaments glabrous, pollen sacs parallel, 1.5–1.9(–2.1) mm, distal 1/2–2/3 indehiscent, sides glabrous or hispidulous to lanate, hairs white, to 0.5 mm, sutures denticulate, teeth to 0.2 mm;

staminode 12–14 mm, reaching orifice or exserted, 0.6–0.8 mm diam., glabrous;

style 18–20 mm.

calyx lobes lanceolate to linear, 8–15 × 1.8–3.5 mm, glandular-pubescent;

corolla lavender, blue, or violet, unlined internally or lined with faint lavender or blue nectar guides abaxially, not personate, funnelform, 26–33(–39) mm, glabrous externally, moderately to densely white-lanate internally abaxially, tube 7–9 mm, throat 8–10 mm diam.;

stamens included, pollen sacs 1.1–1.6 mm;

staminode 11–15 mm, slightly flattened distally, 0.1–0.3 mm diam., tip straight to recurved, glabrous or distal 3–6 mm pubescent, hairs white, to 1.4 mm;

style 25–30 mm.

7–11 × 3.5–4.5 mm.

10–14 × 5–7 mm.

= 32.