Flora of North America species comparison

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

ascending to erect, 9–35 cm, glabrous, often glutinous and covered with sand, not glaucous.

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, ± leathery or not, glabrous, often glutinous and covered with sand, not glaucous;

basal and proximal cauline 18–105 × 1–10 mm, blade oblanceolate to linear, base tapered, margins entire, apex obtuse to acute;

cauline (2 or)3 or 4 pairs, petiolate or sessile, 28–110 × 1–6 mm, blade linear, base tapered to truncate, apex acute.

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.

continuous, secund, 3–26 cm, axis glabrous, sometimes glutinous and covered with sand, verticillasters 3–6(–9), cymes 1–3-flowered, 2 per node;

proximal bracts linear, 22–115 × 1.5–4 mm;

peduncles and pedicels glabrous, sometimes glutinous and covered with sand.

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 lanceolate, (6–)7–12 × 2.8–4 mm, glabrous, glutinous and sometimes covered with sand;

corolla blue to violet or purple, with violet nectar guides, ventricose, 20–28 mm, glabrous externally, glabrous internally, tube 8–9 mm, throat abruptly inflated, slightly constricted at orifice, (7–)10–12 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice, pollen sacs divergent, navicular-sigmoid, 2–2.5 mm, dehiscing incompletely, proximal 1/5 indehiscent, connective not splitting, sides moderately villous or lanate, hairs white, to 1 mm, sutures denticulate, teeth to 0.1 mm;

staminode: 11–18 mm, reaching orifice or slightly exserted, 0.6–0.8 mm diam., tip straight, distal 1–2 mm sparsely to moderately pilose, hairs yellow, to 1 mm;

style 17–20 mm.

9–13 × 5–6.5 mm.

(5–)7–11 × (4–)5–8 mm.