Flora of North America species comparison

rhizomelike.

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

ascending to erect, 10–27 cm, glabrous, glutinous, usually covered with sand, 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.

cauline, leathery, glabrous, sometimes glutinous;

cauline 3–5 pairs, short-petiolate or sessile, (12–)20–50(–55) × (3–)10–24 mm, blade obovate or spatulate proximally, obovate to lanceolate distally, base tapered, margins dentate, apex rounded to obtuse or 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.

continuous, cylindric, (1–)2–9 cm, axis glabrous or sparsely puberulent, glutinous, verticillasters 2–8, cymes 2–6-flowered, 2 per node;

proximal bracts lanceolate, 16–58 × 3–12 mm, margins dentate;

peduncles and pedicels erect, glabrous or puberulent, glutinous.

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 to lanceolate, 4.5–8.4 × 1.6–3 mm, glutinous;

corolla white to lavender, with reddish purple nectar guides, tubular-funnelform, 11–15(–18) mm, glabrous externally, sparsely white-pilose internally abaxially, tube 6–7 mm, throat gradually inflated, 3–5 mm diam., rounded abaxially;

stamens included, pollen sacs opposite, navicular to subexplanate, 0.8–0.9 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth;

staminode 7–10 mm, included, 0.6–0.8 mm diam., tip slightly recurved, distal 0.5–2.5 mm sparsely pilose, hairs white, to 0.5 mm;

style 7–8 mm.

6–8 × 2.5–4.5 mm.

5–8 × 4–5 mm, glabrous.

= 16.