Flora of North America species comparison

ascending to erect, 40–90 cm, glabrous, glaucous.

ascending to erect, 25–80 cm, retrorsely hairy, not glaucous.

cauline, opposite, glabrous, glaucous;

cauline 6–14 pairs, sessile, 30–85(–102) × 3–13 mm, blade elliptic, base tapered, margins entire, apex acute.

basal and cauline, not leathery, retrorsely hairy, not glaucous;

basal and proximal cauline (35–)50–160 × (5–)8–24 mm, blade oblanceolate to lanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 4–8 pairs, short-petiolate or sessile, 25–85(–125) × 6–15 mm, blade elliptic to lanceolate, base tapered to truncate, apex acute, rarely obtuse.

interrupted, cylindric, 6–30 cm, axis glabrous, verticillasters (5–)8–14, cymes 1(or 2)-flowered, 2 per node;

proximal bracts narrowly elliptic to linear, 8–45 × 1–8 mm;

peduncles and pedicels ascending to erect, glabrous.

interrupted or continuous, cylindric, 7–30 cm, axis retrorsely hairy proximally, mostly glandular-pubescent distally, verticillasters 3–7(–9), cymes 2–8(–10)-flowered, 2 per node;

proximal bracts lanceolate, 18–95 × 5–20 mm;

peduncles and pedicels retrorsely hairy.

calyx lobes obovate to ovate or elliptic, 1.8–3.2 × 1.5–2.2 mm, glabrous or minutely ciliolate distally;

corolla light lavender to violet or purple, with violet nectar guides, weakly ventricose, 22–26(–28) mm, glabrous externally, glabrous internally, tube 7–9 mm, throat gradually inflated, 7–9 mm diam., 2-ridged abaxially;

stamens included or longer pair exserted, filaments glabrous, pollen sacs parallel to slightly divergent, 1.5–2 mm, distal 2/3 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 15–16 mm, included, 0.5–0.6 mm diam., glabrous;

style 16–20 mm.

calyx lobes ovate to lanceolate, (4.8–)6–11 × 2.2–3.5 mm, margins erose, glabrous or sparsely glandular, sometimes also sparsely puberulent;

corolla violet to blue, without nectar guides, ventricose, 25–35 mm, glabrous externally, glabrous internally, tube 7–10 mm, throat gradually inflated, not constricted at orifice, 7–11 mm diam., 2-ridged abaxially;

stamens included, pollen sacs divergent to nearly opposite, sigmoid, 1.8–2.2 mm, dehiscing incompletely, proximal 1/5–1/4 indehiscent, connective not splitting, sides sparsely hispid, hairs white, to 0.3 mm, sutures denticulate, teeth to 0.1 mm;

staminode 14–16 mm, included, 0.7–0.8 mm diam., tip straight, glabrous;

style (11–)15–22 mm.

7–10 × 4.5–5.5 mm.

8–11 × 5–6 mm.