Flora of North America species comparison

retrorsely hairy, rarely glabrous, not glaucous.

erect, (5–)10–50 cm, glabrous or retrorsely hairy, hairs pointed.

cauline, rarely basal and cauline (P. retrorsus), opposite, leathery or not, glabrous, glabrate, pubescent, scabrous, puberulent, or retrorsely hairy, not glaucous;

basal and proximal cauline petiolate;

cauline petiolate or sessile, blade obovate, spatulate, oblanceolate, lanceolate, elliptic, or linear, margins entire.

leathery, sparsely retrorsely hairy, hairs pointed, especially along margins, or glabrous;

cauline 10–30 pairs, sessile, 4–32 × 0.5–1.2 mm, blade linear, base tapered to clasping, apex acuminate.

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

peduncles and pedicels spreading to ascending or erect.

interrupted, secund, (1–)3–15 cm, axis retrorsely hairy to puberulent, or glabrous, verticillasters 1–7, cymes 1–3-flowered, 1(or 2) per node;

proximal bracts linear, 3–14 × 0.3–1 mm;

peduncles and pedicels ascending to erect, glandular-pubescent, sometimes puberulent.

calyx tube 0.2–1 mm (1.5–2 mm in P. retrorsus), lobes: margins entire or erose, ± scarious or herbaceous, glandular-pubescent or retrorsely hairy, rarely glabrate;

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

stamens included to exserted, filaments glabrous, rarely sparsely glandular-puberulent proximally, pollen sacs opposite, rarely divergent, navicular to subexplanate or explanate, dehiscing completely, connective splitting, sides glabrous, sutures papillate or smooth;

staminode included to exserted, ± flattened distally, 0.1–0.5 mm diam., tip straight to recurved, distal (20–)50–100% hairy, hairs to 0.7–1.3 mm;

style glabrous.

calyx lobes lanceolate, 5–7 × 1.5–2 mm, scarious-margined, glandular-pubescent, hairs pointed;

corolla scarlet, throat sometimes yellow or yellow- or orange-spotted, unlined internally, salverform, 25–32 mm, yellow-lanate internally abaxially, tube 4–6 mm, throat slightly inflated, 4–5 mm diam., slightly 2-ridged abaxially;

stamens exserted (often hidden by galeate adaxial lobes), filaments glabrous, pollen sacs opposite, explanate, 0.8–1 mm, sutures smooth;

staminode 12–17 mm, included, slightly flattened distally, 0.1–0.2 mm diam., tip straight, distal 9–10 mm densely pilose, hairs yellow, to 1.3 mm;

style 21–27 mm.

glabrous.

5–9 × 3–4 mm.

dark brown to black, angled to rounded, 1.1–2.1 mm.

= 16.