Flora of North America species comparison

20–40 cm, glabrous or glabrate.

ascending to erect, (5–)8–23 cm, glabrous, not glaucous.

10–20 pairs, 5–32 × 0.3–2 mm, blade base tapered, margins glabrous or scabrous, apex acuminate to mucronate.

cauline, opposite, glabrous abaxially, glabrate or retrorsely hairy adaxially, hairs appressed, white, scalelike, not glaucous;

cauline 2–6 pairs, sessile or proximals short-petiolate, 13–70 × (3–)7–17 mm, blade elliptic to lanceolate, base tapered, margins entire, apex obtuse to acute.

2–15(–23) cm, verticillasters (2–)5–10(–30), cymes 1- or 2-flowered;

proximal bracts linear, 3–22 × 0.2–1 mm;

peduncles and pedicels glabrous or scabrous.

continuous, cylindric, (1–)2–12 cm, axis glabrous, verticillasters (2 or)3–7, cymes 3–5-flowered, 2 per node;

proximal bracts lanceolate, 14–45 × 2–12 mm;

peduncles and pedicels ascending to erect, glabrous or pedicels ± puberulent, hairs appressed, white, scalelike.

calyx lobes ovate, 1–2.7 × 0.9–1.5 mm;

corolla lavender to violet, lined internally abaxially with reddish purple nectar guides, funnelform, 8–14 mm, glandular-pubescent internally in 2 lines on abaxial surface, sometimes also in sinuses of adaxial lobes, tube (1.5–)2–3 mm, throat 3–5 mm diam.;

stamens included or longer pair reaching orifice or barely exserted, pollen sacs 0.4–0.5 mm;

staminode 5–6 mm;

style 7–9 mm.

calyx lobes ovate, (4–)5–6.3 × 1.5–2.6 mm, glabrous or ± scabrous proximally;

corolla violet to light blue, without nectar guides, abaxial ridges usually white, ventricose, 24–32 mm, glabrous externally, glabrous internally, tube 7–10 mm, throat gradually inflated, 8–13 mm diam., 2-ridged abaxially;

stamens: longer pair reaching orifice or exserted, filaments glabrous, pollen sacs parallel, 2.4–2.8 mm, distal 1/2–2/3 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 15–18 mm, included, 0.4–0.7 mm diam., glabrous;

style 18–27 mm.

(4–)5–8 × 3–4 mm.

7–9 × 5–6 mm.

= 16.