Flora of North America species comparison

erect, 3–25 cm, glabrous or ± retrorsely hairy, not glaucous.

decumbent to ascending or erect, 7–65(–90) cm, glabrous or retrorsely hairy to pubescent, not glaucous.

basal and cauline, not leathery, glabrous;

basal and proximal cauline (10–)17–60 × 5–18 mm, blade spatulate to oblanceolate, lanceolate, or elliptic, base tapered, margins entire, apex rounded to obtuse or acute;

cauline 2–6 pairs, short-petiolate or sessile, 10–55 × 3–15 mm, blade ovate to lanceolate, base tapered to clasping, margins entire, apex obtuse to acute.

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

basal and proximal cauline (25–)30–90(–140) × (3–)6–20(–35) mm, blade oblanceolate to elliptic or lanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 3–8 pairs, short-petiolate or sessile, 35–70(–150) × 3–20(–30) mm, blade oblanceolate to elliptic, lanceolate, or linear, base tapered to clasping, apex obtuse to acute.

interrupted, cylindric, 1–6 cm, axis sparsely glandular-pubescent, sometimes also retrorsely hairy, verticillasters 1–3(or 4), cymes 2–6-flowered, 2 per node;

proximal bracts lanceolate, 2–15 × 1–7 mm, margins entire;

peduncles and pedicels erect, sparsely to moderately glandular-pubescent.

continuous, secund or cylindric, (1–)3–35 cm, axis glabrous or puberulent, rarely glandular or glandular-pubescent, verticillasters (2–)4–14, cymes 1–4-flowered, 2 per node;

proximal bracts lanceolate, rarely ovate or linear, (15–)20–80 × (1–)2–23 mm;

peduncles and pedicels ascending to erect, glabrous or retrorsely hairy, rarely glandular-pubescent, peduncles to 20 mm, pedicels 1–8 mm.

calyx lobes lanceolate, 3–4 × 0.8–1.2 mm, glandular-pubescent;

corolla dark blue, sometimes whitish, without nectar guides, funnelform, 9–12 mm, glandular-pubescent externally, moderately whitish lanate internally abaxially, tube 3–4 mm, throat slightly inflated, 2–3 mm diam., 2-ridged abaxially;

stamens included, pollen sacs opposite, explanate to subexplanate, 0.5–0.6 mm, dehiscing completely, connective splitting, sides glabrous, sutures smooth;

staminode 5–6 mm, included, 0.2–0.3 mm diam., tip straight to slightly recurved, distal 0.5–1 mm moderately pilose, hairs golden yellow, to 0.5 mm;

style 4–6 mm.

calyx lobes ovate to lanceolate, rarely obovate, (4–)6–11(–13.5) × 2–4 mm, margins erose, apex acute to acuminate or cuspidate, glabrous or ± glandular proximally;

corolla blue to violet, with reddish purple nectar guides, ventricose, 25–35 mm, glabrous externally, glabrous, rarely sparsely white-pilose, internally abaxially, tube 8–13 mm, throat gradually inflated, slightly constricted at orifice, 7–10(–13) mm diam., 2-ridged abaxially;

stamens: longer pair reaching orifice, pollen sacs divergent, sigmoid, (1.8–)2–3 mm, dehiscing incompletely, proximal 1/3 indehiscent, connective not splitting, sides glabrous or sparsely hispidulous, hairs tan, to 0.3 mm, sutures papillate or denticulate, teeth to 0.1 mm;

staminode 14–18 mm, included, 0.6–1 mm diam., tip straight to recurved, glabrous or distal 1–7 mm sparsely pilose, hairs yellow to yellowish orange, to 0.8 mm;

style 18–23 mm.

4–7 × 2.5–4 mm, glabrous.

10–16 × 6–8 mm.

= 16.