Flora of North America species comparison

ascending to erect, 13–50 cm, retrorsely hairy, hairs pointed, not glaucous.

ascending to erect, (15–)20–45(–50) cm, glabrous.

essentially cauline, opposite, retrorsely hairy, hairs pointed, sometimes glabrate, not glaucous;

cauline 5–8 pairs, petiolate or sessile, 22–80 × (1–)2–9 mm, blade oblanceolate to lanceolate or linear, base tapered, margins entire, apex obtuse to acute.

basal and cauline, glabrous;

basal and proximal cauline 20–80(–102) × 2–25 mm, blade spatulate to oblanceolate, base tapered, apex rounded to obtuse or acute, sometimes mucronate;

cauline 4–6 pairs, sessile, (16–)20–78 × 3–24 mm, blade ovate to elliptic or lanceolate, base clasping to cordate-clasping, apex acute to acuminate.

interrupted, cylindric, 4–14 cm, axis glandular-pubescent, verticillasters (3 or)4–8(–12), cymes 1–5-flowered, 2 per node;

proximal bracts lanceolate, 5–40 × 1–4 mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

interrupted to nearly continuous, secund, 6–24(–31) cm, axis glabrous, verticillasters (2 or)3–10(–12), cymes 2–7-flowered;

proximal bracts ovate, 9–70 × 2–26 mm;

peduncles and pedicels glabrous.

calyx lobes ovate to lanceolate, 3.8–7 × 1.4–2.6 mm, glandular-pubescent;

corolla blue to violet or purple, without nectar guides, funnelform, 15–25 mm, glandular-pubescent externally, glabrous internally, tube 6–8 mm, throat gradually inflated, 6–9 mm diam., slightly 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1.5–2 mm, distal 1/2 indehiscent, sides hispidulous, hairs white, to 0.5 mm near filament attachment, sutures denticulate, teeth to 0.2 mm;

staminode 12–15 mm, reaching orifice, 0.5–1 mm diam., glabrous;

style 13–17 mm.

calyx lobes ovate, 4–7 × 2.4–4 mm, margins erose, sometimes entire, broadly scarious, glabrous;

corolla blue to violet or lavender, rarely pink, with reddish or reddish purple nectar guides, tubular-funnelform to ventricose, 15–25 mm, glabrous externally, glabrous or sparsely to densely white-villous internally abaxially, tube 8–11 mm, throat gradually inflated, 4–7 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice, pollen sacs opposite, 1–1.4 mm, sutures papillate;

staminode 10–13 mm, included or reaching orifice, 1–1.4 mm diam., tip abruptly recurved, bifurcate, distal 4–6 mm densely villous, hairs golden yellow, to 2 mm;

style 9–15 mm.

(5.5–)7–9 × (3–)4–6 mm.

9–12 × 7–9 mm.