Flora of North America species comparison

ascending to erect, (8–)15–50 cm, retrorsely hairy, not glaucous.

erect, 14–30(–45) cm, glabrous, sometimes glaucous.

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

basal and proximal cauline 16–60(–80) × 1–3(–4) mm, blade linear, base tapered, margins entire, apex obtuse to acute;

cauline 6–11 pairs, sessile, (2–)10–75 × (0.2–)0.5–3 mm, blade linear, base tapered, apex acuminate.

basal and cauline, opposite, glabrous, usually glaucous;

basal and proximal cauline (7–)15–50 × (4–)7–20 mm, blade ovate to deltate, base tapered to truncate, margins entire, apex rounded to obtuse;

cauline 1 or 2(or 3) pairs, short-petiolate or sessile, 12–57 × 3–20 mm, blade oblanceolate, base tapered to truncate, margins entire, apex obtuse to acute.

interrupted, secund, (2–)5–25 cm, axis glabrous or puberulent, verticillasters 3–10, cymes 1- or 2-flowered, 1 or 2 per node;

proximal bracts linear, 4–30 × 0.5–2 mm;

peduncles and pedicels glabrous or puberulent.

interrupted, cylindric, 6–17 cm, axis glandular-pubescent, verticillasters 3–5, cymes 1–3-flowered, 2 per node;

proximal bracts oblanceolate to lanceolate, 6–28 × 1–6 mm;

peduncles and pedicels ascending, glandular-pubescent.

calyx lobes ovate, sometimes obovate or truncate, 3–4.5(–5) × 1.5–2.4 mm, glabrous or sparsely puberulent;

corolla bluish violet to violet, lavender, or purple, with reddish purple nectar guides, ventricose, 17–23 mm, glabrous externally, glabrous internally, tube 5–7 mm, throat gradually inflated, slightly constricted at orifice, (5–)7–9 mm diam., rounded abaxially;

stamens: longer pair exserted, pollen sacs opposite, navicular, 1.2–1.5 mm, dehiscing incompletely, connective not splitting, sides glabrous, sutures papillate;

staminode 12–14 mm, exserted, 0.5–0.8 mm diam., tip straight to recurved, glabrous;

style 13–17 mm.

calyx lobes oblong to lanceolate, 3.5–5 × 1.5–2.1 mm, glandular-pubescent;

corolla light purple to lavender, violet, or blue, without nectar guides, ventricose, 17–23 mm, glandular-pubescent externally, glabrous internally, tube 4.5–6 mm, throat slightly inflated, 4.5–7 mm diam., 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1.1–1.3 mm, distal 1/2 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 10–13 mm, included, 0.2–0.3 mm diam., glabrous;

style 11–13 mm.

7–14 × 4–5 mm.

(6–)8–10 × 4–5.5 mm.