Flora of North America species comparison

decumbent to ascending or erect, (5–)10–30(–47) cm, puberulent or retrorsely hairy, hairs pointed, not glaucous.

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

cauline, opposite, glabrous, sometimes proximals puberulent, hairs pointed, not glaucous;

cauline 2–7 pairs, short-petiolate or sessile, 11–48(–60) × 2–12 mm, blade oblanceolate to spatulate or obovate, rarely linear, base tapered, margins entire, apex rounded to obtuse or acute.

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, cylindric to ± secund, (1–)2–15(–25) cm, axis glabrous or retrorsely hairy, verticillasters 2–8, cymes 1–4-flowered, 2 per node;

proximal bracts lanceolate, 10–35 × 1–4 mm;

peduncles and pedicels ascending to erect, peduncles glabrous or sparsely retrorsely hairy, pedicels glabrous or papillate distally.

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 to lanceolate, 3–5.5 × 0.9–2.2 mm, margins entire or erose, scarious, apex acuminate to caudate, glabrous;

corolla lavender to blue or violet, with or without faint lavender nectar guides, funnelform to ventricose, 14–26 mm, glabrous externally, glabrous internally, tube 5–8 mm, throat gradually inflated, 6–8(–10) mm diam., slightly 2-ridged abaxially;

stamens included or longer pair reaching orifice, filaments glabrous, pollen sacs parallel, 0.9–1.9 mm, distal 1/2–2/3 indehiscent, sides glabrous or puberulent, hairs white, to 0.1 mm, sutures denticulate, teeth to 0.2 mm;

staminode 10–15 mm, included or reaching orifice, 0.6–0.9 mm diam., glabrous;

style 12–18 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.

6–8 × 2.5–4.5 mm.

5–8 × 3–4.8 mm.