Flora of North America species comparison

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

erect, sometimes ascending, 30–63 cm, glabrous, not 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, or basal absent, not leathery, glabrous or retrorsely hairy, not glaucous;

basal and proximal cauline 30–90(–116) × 5–26 mm, blade oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 6–12 pairs, sessile, 25–113 × 3–13 mm, blade lanceolate to linear, base tapered to truncate, 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.

continuous, sometimes interrupted, secund, 16–30 cm, axis glabrous, verticillasters 7–11, cymes 1–4-flowered, (1 or)2 per node;

proximal bracts lanceolate to linear, 10–72 × 1–12 mm;

peduncles and pedicels glabrous.

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 to elliptic, 3–5 × 2–2.6 mm, glabrous;

corolla lavender to violet, with reddish purple nectar guides, ventricose, 26–34 mm, glabrous externally, sparsely to densely white-villous internally abaxially, tube 7–8 mm, throat gradually to abruptly inflated, not constricted at orifice, 7–10 mm diam., rounded abaxially;

stamens: longer pair exserted, pollen sacs opposite, navicular, 1.4–1.9 mm, dehiscing completely, sides glabrous, sutures smooth or papillate;

staminode 14–16 mm, reaching orifice or exserted, 1–1.2 mm diam., tip straight, glabrous;

style 14–18 mm.

7–8 × 3.5–4.5 mm.

9–14 × 5–6 mm.

= 16.