Flora of North America species comparison

ascending to erect, (6–)15–50 cm, retrorsely hairy, sometime glabrate, not glaucous.

decumbent to ascending, (4–)7–18(–30) cm, glabrous.

cauline, opposite, subopposite, or whorled, not leathery, glabrous or retrorsely hairy;

cauline 5–9 pairs, petiolate or sessile, (7–)10–50(–52) × (0.5–)1–20 mm, blade oblanceolate to ovate or spatulate, lanceolate to linear distally, base of proximals tapered, distals clasping, margins serrate to serrulate, rarely entire, apex rounded to obtuse, acute, or acuminate.

basal and cauline, glabrous;

basal and proximal cauline 21–50(–70) × 4–11(–17) mm, blade spatulate to oblanceolate, base tapered, apex rounded to obtuse, acute, or mucronate;

cauline 2–5 pairs, short-petiolate or sessile, 21–58 × 3–11 mm, blade lanceolate to oblanceolate, base tapered to clasping, apex obtuse to acute or mucronate.

interrupted, cylindric, 6–30 cm, axis ± glandular-pubescent, verticillasters 5–11, cymes 1–6-flowered, 2 per node;

proximal bracts lanceolate to linear, 6–40 × 1–4 mm, margins entire or serrate to serrulate;

peduncles and pedicels ascending to erect, glandular-pubescent.

continuous, cylindric, 3–14 cm, axis glabrous, verticillasters 4–9, cymes (1 or)2–6-flowered;

proximal bracts oblanceolate to lanceolate, 13–60 × 5–16 mm;

peduncles and pedicels glabrous.

calyx lobes ovate to lanceolate, 2.3–7 × 0.6–1.9 mm, glandular-pubescent;

corolla white to ochroleucous, sometimes tinged lavender, with brownish or purple nectar guides, funnelform, 9–18 mm, glabrate to glandular-pubescent externally, glandular-pubescent internally, sometimes glabrous or glabrate adaxially, tube 4–5 mm, throat slightly inflated, 2.5–5 mm diam., slightly 2-ridged abaxially;

stamens: longer pair slightly exserted, pollen sacs opposite, explanate, 0.4–0.8 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate;

staminode 8–9 mm, exserted, 0.2–0.3 mm diam., tip straight, glabrous or distal 0.5–2.5 mm sparsely pilose or villous, hairs yellow or white, to 0.5 mm;

style 7–10 mm.

calyx lobes lanceolate, 4–6.2(–7.5) × 0.9–1.6 mm, margins entire or erose, narrowly scarious, glabrous;

corolla blue to violet, with reddish purple nectar guides, tubular-funnelform, (10–)12–15 mm, glabrous externally, sparsely white-pubescent internally abaxially or glabrous, tube 4–5 mm, throat gradually inflated, 4.5–5.5 mm diam., rounded abaxially;

stamens included, pollen sacs divergent, 0.7–0.8 mm, sutures smooth or obscurely papillate;

staminode 6–8 mm, included, 0.8–1 mm diam., tip recurved, distal 3–4 mm densely pubescent, hairs golden yellow, to 1 mm;

style 8–10 mm.

3–5 × 2.5–4 mm, glabrous.

6–10(–12) × 5–6 mm.