Flora of North America species comparison

retrorsely hairy or puberulent, sometimes glandular-pubescent distally or glabrescent, not glaucous.

basal and cauline, basal usually absent at anthesis, opposite, leathery or not, glabrous, puberulent, or retrorsely hairy, not glaucous;

basal and proximal cauline petiolate, sometimes short-petiolate or sessile (P. dasyphyllus);

cauline sessile, sometimes short-petiolate (P. lanceolatus), blade lanceolate or linear, margins entire.

interrupted, ± secund to cylindric, axis glandular-pubescent or glabrous, cymes 1 or 2 per node;

peduncles and pedicels ascending to erect.

calyx lobes: margins entire or erose (P. stenophyllus), herbaceous or narrowly scarious, sometimes broadly scarious (P. stenophyllus), glandular-pubescent or glabrous;

corolla lavender to blue, violet, purple, red, or scarlet, bilaterally symmetric, bilabiate, not personate, ventricose or tubular-funnelform, glandular-pubescent externally, glabrous or glandular-pubescent internally abaxially, throat abruptly or gradually inflated, not constricted at orifice, rounded to 2-ridged abaxially;

stamens included to exserted, filaments glabrous, pollen sacs parallel to divergent, navicular to slightly saccate, dehiscing completely or incompletely, distal 1/5 or less sometimes indehiscent, connective splitting, sides glabrous, sutures denticulate, teeth to 0.2–0.3 mm;

staminode included or exserted, flattened distally, 0.3–2.6 mm diam., tip recurved, glabrous;

style glabrous.

glabrous.

brown to dark brown, angled, 1.9–3.2 mm.