Flora of North America species comparison

decumbent to ascending or erect, (5–)10–30(–47) cm, puberulent or retrorsely hairy, hairs pointed, not glaucous.

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

cauline, opposite, glabrous, sometimes proximals puberulent, hairs pointed, not glaucous;

cauline 2–7 pairs, short-petiolate or sessile, 11–48(–60) × 2–12 mm, blade oblanceolate to spatulate or obovate, rarely linear, base tapered, margins entire, apex rounded to obtuse or acute.

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.

continuous or interrupted, cylindric to ± secund, (1–)2–15(–25) cm, axis glabrous or retrorsely hairy, verticillasters 2–8, cymes 1–4-flowered, 2 per node;

proximal bracts lanceolate, 10–35 × 1–4 mm;

peduncles and pedicels ascending to erect, peduncles glabrous or sparsely retrorsely hairy, pedicels glabrous or papillate distally.

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 to lanceolate, 3–5.5 × 0.9–2.2 mm, margins entire or erose, scarious, apex acuminate to caudate, glabrous;

corolla lavender to blue or violet, with or without faint lavender nectar guides, funnelform to ventricose, 14–26 mm, glabrous externally, glabrous internally, tube 5–8 mm, throat gradually inflated, 6–8(–10) mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, filaments glabrous, pollen sacs parallel, 0.9–1.9 mm, distal 1/2–2/3 indehiscent, sides glabrous or puberulent, hairs white, to 0.1 mm, sutures denticulate, teeth to 0.2 mm;

staminode 10–15 mm, included or reaching orifice, 0.6–0.9 mm diam., glabrous;

style 12–18 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.

6–8 × 2.5–4.5 mm.

(6–)8–10 × 4–5.5 mm.