Flora of North America species comparison

ascending to erect, 8–50 cm, retrorsely hairy, hairs pointed or white, scalelike.

ascending to erect, 10–35 cm, glabrous or sparsely retrorsely hairy, hairs white, scalelike.

not leathery, glabrous, glabrate, or sparsely to densely retrorsely hairy, hairs pointed, sometimes appressed, white, scalelike;

cauline 6–12(–20) pairs, petiolate or sessile, 4–26 × 0.5–3.5 mm, blade oblanceolate to lanceolate or linear, base tapered to truncate, apex mucronate.

leathery, glabrous, rarely sparsely retrorsely hairy, hairs white, scalelike abaxially, densely puberulent, hairs white, scalelike adaxially;

cauline 10–30 pairs, petiolate, 5–18 × 1–1.5 mm, blade oblanceolate to linear, base tapered, apex mucronate.

continuous or interrupted, ± secund, 3–17 cm, axis glandular-pubescent, verticillasters 3–9(–12), cymes 1 or 2(or 3)-flowered, 1(or 2) per node;

proximal bracts lanceolate to linear, 6–25 × 0.7–1 mm;

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

continuous or interrupted, ± secund, 2–15 cm, axis glandular-pubescent, verticillasters 5–13, cymes 1–3-flowered, 1 per node;

proximal bracts oblanceolate to linear, 5–12 × 0.5–1 mm;

peduncles and pedicels ascending to erect, glandular-pubescent.

calyx lobes ovate, rarely lanceolate, 4–7(–9) × 2–3 mm, broadly scarious-margined, apex acute to acuminate, glandular-pubescent, hairs pointed;

corolla blue or lavender, lined internally abaxially with reddish purple nectar guides, ventricose-ampliate, 16–20 mm, moderately white- or yellowish villous internally abaxially, tube 5–6 mm, throat abruptly inflated, 5.5–8 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or slightly exserted, filaments glabrous, pollen sacs opposite, navicular, 0.9–1.3 mm, sutures papillate;

staminode 6–8 mm, exserted, flattened distally, 0.3–0.5 mm diam., tip straight to recurved, distal 1–5 mm densely pilose, hairs yellow or golden yellow, to 1.2 mm, rest of distal 1–7 mm glabrous or sparsely to moderately pilose;

style 10–11 mm.

calyx lobes ovate to lanceolate, 2.5–3.5 × 1.2–1.8 mm, scarious-margined, glandular-pubescent, hairs pointed;

corolla lavender to violet or purple, lined internally abaxially with reddish purple nectar guides, tubular-funnelform, 9–14 mm, densely yellow- or whitish lanate internally abaxially, tube 3–5 mm, throat gradually inflated, 3.5–5 mm diam., slightly 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs opposite, navicular, 0.5–0.8 mm, sutures papillate;

staminode 7–8 mm, included or reaching orifice, flattened distally, 0.2–0.4 mm diam., tip straight to recurved, distal 5–6 mm densely pilose, hairs golden yellow, to 1 mm;

style 8–11 mm.

5–9 × 3.5–5 mm.

5–8 × 3–4.8 mm.