Flora of North America species comparison

prostrate, decumbent, ascending, or erect, 2–28 cm, retrorsely hairy or pubescent.

ascending to erect, 24–50 cm, glabrous proximally, sparsely glandular-pubescent distally, glaucous.

not leathery, glabrous, glabrate, scabrous, or pubescent, hairs pointed;

cauline (1 or)2–4 pairs, petiolate, (2–)4–47 × 0.5–8 mm, blade elliptic to obovate, oblanceolate, or linear, base tapered, apex acute to mucronate.

basal and cauline, basal sometimes few, opposite, glabrous, glaucous;

basal and proximal cauline 20–75(–90) × 4–16(–20) mm, blade oblanceolate to elliptic, base tapered, margins entire, apex rounded to obtuse;

cauline 3 or 4 pairs, sessile or proximals short-petiolate, 17–80 × 3–18 mm, blade oblanceolate to oblong or lanceolate, base tapered to cordate-clasping, margins entire, apex obtuse to acute.

continuous, ± secund, 1–8(–16) cm, axis retrorsely hairy, hairs pointed and, usually, sparsely glandular-pubescent, verticillasters (1 or)2–8, cymes 1–4-flowered, 1 or 2 per node;

proximal bracts oblanceolate to linear, 10–25 × 0.5–4 mm;

peduncles and pedicels ascending to erect, retrorsely hairy and, usually, sparsely glandular-pubescent.

interrupted, cylindric, 5–22 cm, axis glandular-pubescent, verticillasters 3–6, cymes 1- or 2(or 3)-flowered, 2 per node;

proximal bracts lanceolate, 20–44 × 4–13 mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

calyx lobes lanceolate, 4–7(–7.5) × 0.9–1.8(–2.2) mm, broadly scarious-margined, apex acuminate to caudate, retrorsely puberulent, hairs pointed, and sparsely glandular-pubescent;

corolla blue to violet or lavender, lined internally abaxially with violet or reddish purple nectar guides, funnelform, 14–20 mm, sparsely to densely yellow-lanate or yellow-pilose internally abaxially, tube 6–8 mm, throat gradually inflated, 6–8 mm diam., 2-ridged abaxially;

stamens: longer pair reaching orifice, filaments glabrous, pollen sacs opposite, navicular to subexplanate, 0.9–1.4 mm, sutures papillate;

staminode 11–14 mm, reaching orifice or exserted, flattened distally, 0.3–0.4 mm diam., tip straight to recurved, distal 7–10 mm densely pilose, hairs golden yellow, to 1 mm;

style 13–15 mm.

calyx lobes lanceolate, 7–10 × 1.8–2.6 mm, glandular-pubescent;

corolla violet to blue or lavender, without nectar guides, ventricose, (25–)30–35 mm, glandular-pubescent externally, glabrous internally, tube 10–11 mm, throat gradually inflated, 7–9 mm diam., 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1.5–2 mm, distal 1/2–2/3 indehiscent, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 19–24 mm, included, 0.4–0.6 mm diam., distal 10–14 mm moderately to densely pilose, hairs golden yellow, to 1.2 mm;

style 26–30 mm.

7–8 × 3.5–4.5 mm.

7–9 × 4–5 mm.