Flora of North America species comparison

prostrate or ascending, 4–15(–25) cm, retrorsely hairy, hairs appressed, white, scalelike.

ascending to erect, 25–50 cm, retrorsely hairy, not glaucous.

not leathery, densely retrorsely hairy, hairs appressed, white, scalelike;

cauline 1–5 pairs, petiolate, 6–25(–33) × 2–6.5 mm, blade obovate to spatulate, base tapered, apex mucronate, sometimes rounded or obtuse.

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

basal and proximal cauline 40–120 × 4–33 mm, blade obovate to oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 3–5 pairs, short-petiolate or sessile, 35–70(–90) × 8–22 mm, blade lanceolate to oblanceolate, base tapered to truncate or clasping, apex obtuse to acute.

continuous, secund, (1–)2–12 cm, axis retrorsely hairy, hairs appressed, white, scalelike, sometimes also glandular-pubescent distally, verticillasters (1–)3–12, cymes 1–3(–5)-flowered, 1 per node;

proximal bracts spatulate to oblanceolate, 5–19 × 1.5–4 mm;

peduncles and pedicels spreading to ascending, retrorsely hairy, hairs pointed, and, sometimes, sparsely glandular-pubescent.

interrupted, secund, 9–22 cm, axis glabrous or sparsely retrorsely hairy, verticillasters 7–15, cymes 5- or 6-flowered, 2 per node;

proximal bracts lanceolate, 12–50 × 3–16 mm;

peduncles and pedicels glabrous or sparsely retrorsely hairy.

calyx lobes lanceolate, 4–6 × 1–1.7 mm, herbaceous- or narrowly scarious-margined, sparsely glandular-pubescent and retrorsely hairy, hairs appressed, white, scalelike;

corolla blue to violet or purple, lined internally abaxially with reddish violet nectar guides, ampliate, 10–18 mm, yellow-lanate internally abaxially, tube 6–7 mm, throat gradually inflated, 4.5–6 mm diam., 2-ridged abaxially;

stamens reaching orifice or longer pair exserted, filaments glabrous, pollen sacs divergent, navicular, 0.8–1.2(–1.4) mm, sutures papillate;

staminode 8–9 mm, exserted, flattened distally, 0.2–0.3 mm diam., tip recurved, distal 6–8 mm pubescent, hairs yellow or orange, to 0.8 mm;

style 10–13 mm.

calyx lobes ovate, 2.5–4 × 1.5–1.7(–2) mm, margins narrowly scarious, apex obtuse, sometimes acute to cuspidate, glabrous;

corolla blue to violet, without nectar guides, ventricose, 13–21 mm, glabrous externally, glabrous internally, tube 5–6 mm, throat gradually inflated, not constricted at orifice, 5–7 mm diam., rounded abaxially;

stamens included or longer pair reaching orifice, pollen sacs divergent, navicular, 1.3–1.7 mm, dehiscing incompletely, proximal 1/3–1/2 sometimes indehiscent, connective not splitting, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 8–11 mm, included, 0.6–0.8 mm diam., tip straight, distal 5–8 mm sparsely to moderately pilose, hairs yellow, to 1 mm;

style 11–13 mm.

3.5–5.5 × 3–4 mm.

6–9 × 4.5–6.5 mm.