Flora of North America species comparison

ascending, (8–)10–40 cm, glabrous or retrorsely hairy, not glaucous.

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

essentially cauline, basal usually poorly developed, not leathery, glabrous;

basal and proximal cauline 10–40(–65) × 1–6 mm, blade oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 3–5 pairs, sessile or proximals short-petiolate, 12–60 × 2–5(–7) mm, blade oblanceolate to lanceolate or linear, base tapered, margins entire, apex acute.

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.

interrupted, cylindric, 1–14 cm, axis glabrous or ± puberulent at axils, verticillasters (1 or)2–6, cymes (1–)3–7-flowered, 2 per node;

proximal bracts lanceolate to linear, 8–30(–45) × 1–7 mm, margins entire;

peduncles and pedicels erect, glabrous.

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 obovate to ovate, 1–1.8 × 0.7–1.1 mm, apex truncate to cuspidate, glabrous;

corolla violet to blue or purple, without nectar guides, funnelform, 7–9(–11) mm, glabrous externally, moderately yellowish or white-pilose internally abaxially, tube 3–4 mm, throat slightly inflated, 2–3 mm diam., 2-ridged abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, explanate, 0.3–0.4(–0.5) mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth;

staminode 4–6 mm, included, 0.3–0.4 mm diam., tip straight, distal 0.5–1 mm sparsely to moderately pilose, hairs yellow, to 0.4 mm;

style 5–6 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.

2.5–4 × 1.8–2.5 mm, glabrous.

7–9 × 5–6 mm.

= 16, 32.