Flora of North America species comparison

ascending to erect, (30–)40–100 cm, viscid glandular-pubescent, not glaucous.

glabrous, puberulent, or retrorsely hairy, rarely glandular-pubescent distally or wholly or retrorsely hairy, glaucous or not.

basal and cauline, opposite, viscid glandular-pubescent, not glaucous;

basal and proximal cauline 25–120(–260) × 7–20(–65) mm, blade elliptic to lanceolate, base tapered, margins entire, subentire, or irregularly serrate to dentate, apex acute to acuminate;

cauline 4–10 pairs, sessile, 32–80(–120) × 12–45 mm, blade ovate to obovate, elliptic, or lanceolate, base tapered to cordate-clasping, margins entire or subentire to irregularly serrate to dentate, apex obtuse to acute or acuminate.

basal and cauline, basals sometimes few, or cauline, opposite, sometimes alternate, rarely whorled or subalternate, leathery, rarely not (P. papillatus, P. platyphyllus), glabrous, glabrate, puberulent, retrorsely hairy, canescent, pilose, hirsute, or glandular-pubescent, glaucous or not;

basal and proximal cauline petiolate;

cauline sessile, petiolate, or short-petiolate, blade obovate, ovate, spatulate, oblanceolate, lanceolate, elliptic, oblong, or linear, margins entire or toothed, rarely laciniate-pinnatifid.

interrupted, cylindric, (5–)8–31 cm, axis viscid glandular-pubescent, verticillasters 3–7, cymes (1 or)2–8-flowered, 2 per node;

proximal bracts ovate, 18–60 × 11–44 mm;

peduncles and pedicels ascending to erect, viscid glandular-pubescent.

interrupted or continuous, cylindric, sometimes secund, axis glabrous, glandular-pubescent, puberulent, or retrorsely hairy, cymes 1 or 2 per node;

peduncles and pedicels spreading to ascending or erect, rarely appressed.

calyx lobes lanceolate, 9–15 × 2.3–3.8 mm, viscid glandular-pubescent;

corolla lavender to bluish lavender or purple, with dark violet nectar guides, ampliate, (28–)30–40 mm, glandular-pubescent externally, sparsely to moderately white-pubescent internally abaxially, tube 9–11 mm, throat gradually inflated, 12–15 mm diam., rounded abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1.6–2.2 mm, distal 1/2 indehiscent, sides glabrous, sutures denticulate, teeth to 0.2 mm;

staminode 22–26 mm, exserted, 0.8–1 mm diam., glabrous, rarely distal 2–4 mm sparsely pubescent, hairs yellow, to 0.4 mm;

style 20–26 mm.

calyx lobes: margins entire or erose, rarely lacerate (P. serrulatus), narrowly scarious or scarious, sometimes herbaceous, rarely broadly scarious (P. serrulatus), glabrous or glandular-pubescent, rarely scabrous, puberulent, pubescent, or ciliolate;

corolla lavender to blue, violet, purple, reddish purple, or pinkish, bilaterally symmetric, ± bilabiate, not personate, funnelform, ventricose, ampliate, or ventricose-ampliate, glabrous or glandular-pubescent externally, glabrous or hairy internally abaxially, throat slightly to gradually inflated, not constricted at orifice, rounded to 2-ridged abaxially;

stamens included or longer pair reaching orifice or exserted, filaments glabrous, rarely hairy distally, pollen sacs parallel, rarely divergent, saccate, dehiscing incompletely, distal 1/5–2/3 indehiscent, connective splitting, sides glabrous or hairy, sutures denticulate, teeth to 0.3 mm;

staminode included to exserted, flattened distally, 0.2–1 mm diam., tip straight, glabrous or distal 5–50(–60)% hairy, hairs to 2.5 mm;

style glabrous.

9–13 × 5–6.5 mm.

glabrous.

tan, gray, or brown, angled, rarely patelliform, 0.5–3.4 mm.