Flora of North America species comparison

decumbent to ascending or erect, (5–)10–30(–47) cm, puberulent or retrorsely hairy, hairs pointed, not glaucous.

ascending to erect, 25–50 cm, retrorsely hairy, not glaucous.

cauline, opposite, glabrous, sometimes proximals puberulent, hairs pointed, not glaucous;

cauline 2–7 pairs, short-petiolate or sessile, 11–48(–60) × 2–12 mm, blade oblanceolate to spatulate or obovate, rarely linear, base tapered, margins entire, apex rounded to obtuse or acute.

basal and cauline, ± leathery or not, retrorsely hairy, not glaucous;

basal and proximal cauline 40–120 × 4–33 mm, blade obovate to oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 3–5 pairs, short-petiolate or sessile, 35–70(–90) × 8–22 mm, blade lanceolate to oblanceolate, base tapered to truncate or clasping, apex obtuse to acute.

continuous or interrupted, cylindric to ± secund, (1–)2–15(–25) cm, axis glabrous or retrorsely hairy, verticillasters 2–8, cymes 1–4-flowered, 2 per node;

proximal bracts lanceolate, 10–35 × 1–4 mm;

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

interrupted, secund, 9–22 cm, axis glabrous or sparsely retrorsely hairy, verticillasters 7–15, cymes 5- or 6-flowered, 2 per node;

proximal bracts lanceolate, 12–50 × 3–16 mm;

peduncles and pedicels glabrous or sparsely retrorsely hairy.

calyx lobes ovate to lanceolate, 3–5.5 × 0.9–2.2 mm, margins entire or erose, scarious, apex acuminate to caudate, glabrous;

corolla lavender to blue or violet, with or without faint lavender nectar guides, funnelform to ventricose, 14–26 mm, glabrous externally, glabrous internally, tube 5–8 mm, throat gradually inflated, 6–8(–10) mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, filaments glabrous, pollen sacs parallel, 0.9–1.9 mm, distal 1/2–2/3 indehiscent, sides glabrous or puberulent, hairs white, to 0.1 mm, sutures denticulate, teeth to 0.2 mm;

staminode 10–15 mm, included or reaching orifice, 0.6–0.9 mm diam., glabrous;

style 12–18 mm.

calyx lobes ovate, 2.5–4 × 1.5–1.7(–2) mm, margins narrowly scarious, apex obtuse, sometimes acute to cuspidate, glabrous;

corolla blue to violet, without nectar guides, ventricose, 13–21 mm, glabrous externally, glabrous internally, tube 5–6 mm, throat gradually inflated, not constricted at orifice, 5–7 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice, pollen sacs divergent, navicular, 1.3–1.7 mm, dehiscing incompletely, proximal 1/3–1/2 sometimes indehiscent, connective not splitting, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 8–11 mm, included, 0.6–0.8 mm diam., tip straight, distal 5–8 mm sparsely to moderately pilose, hairs yellow, to 1 mm;

style 11–13 mm.

6–8 × 2.5–4.5 mm.

6–9 × 4.5–6.5 mm.