Flora of North America species comparison

ascending to erect, 15–45 cm, retrorsely hairy, hairs pointed, not glaucous.

ascending, 13–40 cm, glabrous or retrorsely hairy, usually in lines, not glaucous.

cauline, opposite or subalternate, retrorsely hairy, hairs pointed, not glaucous;

cauline 4–8 pairs, short-petiolate or sessile, 16–70 × 1–8(–14) mm, blade lanceolate to linear, base tapered, margins entire, apex obtuse to acute.

persistent, 2–6 pairs, distals usually distinctly smaller than proximals, petiolate or sessile, (5–)6–50(–60) × 3–12 mm, blade lanceolate to oblanceolate or elliptic, base tapered to clasping, margins entire or ± serrate, or dentate, apex obtuse to acute, glabrous, not glaucous.

interrupted, cylindric, 4–15 cm, axis puberulent or retrorsely hairy, verticillasters 3–10, cymes 1–5(–7)-flowered, 2 per node;

proximal bracts lanceolate to linear, 7–50 × 1–6 mm;

peduncles and pedicels ascending to erect, puberulent or retrorsely hairy.

continuous to ± interrupted, secund, 3–11 cm, axis sparsely glandular-pubescent, sometimes also retrorsely hairy proximally, verticillasters 2–7, cymes 1-flowered;

proximal bracts lanceolate, 4–16 × 1–5 mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

calyx lobes ovate, 3–5.5 × 1.4–2.3 mm, glabrous or sparsely puberulent;

corolla blue to violet or purple, without nectar guides, ampliate, 16–21 mm, glabrous externally, glabrous internally, tube 4–5 mm, throat gradually inflated, 5–6 mm diam., slightly 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1–1.5(–1.8) mm, distal 1/2–2/3 indehiscent, sides hispidulous, hairs white, to 0.1 mm near filament attachment, sutures denticulate, teeth to 0.1 mm;

staminode 10–12 mm, reaching orifice or barely exserted, 0.5–0.7 mm diam., glabrous;

style 11–13 mm.

calyx lobes lanceolate to linear, (7–)9–13(–15) × 1.8–3 mm, glandular-pubescent;

corolla bluish lavender to purplish or violet, unlined internally or lined with faint bluish lavender nectar guides abaxially, not personate, funnelform, 28–48 mm, glabrous externally, sparsely to moderately white-lanate or -villous internally abaxially, tube (5–)8–10 mm, throat 8–13 mm diam.;

stamens included, pollen sacs 1–1.3(–1.5) mm;

staminode 7–12 mm, slightly flattened distally, 0.1–0.3 mm diam., tip straight to recurved, distal 1–4 mm sparsely to densely pubescent, hairs yellow, to 1.2 mm;

style 24–27 mm.

6–7 × 4.5–6 mm.

8–13 × 5.5–7 mm.

= 16.