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, 6–20 cm, retrorsely hairy, hairs appressed, white, ± scalelike, 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, opposite, retrorsely hairy, hairs white, scalelike, not glaucous;

cauline 1–4 pairs, petiolate, 15–45 × 7–24 mm, blade ovate to spatulate or lanceolate, base tapered, margins entire, apex rounded 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, cylindric, 2–7 cm, axis glandular-pubescent, sometimes also retrorsely hairy or appressed-hairy proximally, hairs white, scalelike, verticillasters 3 or 4(–7), cymes (1 or)2–5-flowered, 1 or 2 per node;

proximal bracts lanceolate, 9–25 × 1–5 mm;

peduncles and pedicels ascending, glandular-pubescent.

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 lanceolate, 4–4.8 × 1.4–2 mm, glandular-pubescent;

corolla violet to lavender, without nectar guides, abaxial ridges usually white, weakly ventricose, 15–20 mm, glandular-pubescent externally, glabrous internally, tube 4–6 mm, throat gradually inflated, 4–5 mm diam., 2-ridged abaxially;

stamens included or longer pair reaching orifice, filaments glabrous, pollen sacs nearly parallel to divergent, 1.1–1.6 mm, distal 2/3 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 8–10 mm, exserted, 0.3–0.6 mm diam., glabrous or sparsely pilose, hairs yellow, to 0.2 mm;

style 10–13 mm.

6–8 × 2.5–4.5 mm.

6–8 × 4–5 mm.

= 16.