Flora of North America species comparison

ascending to erect, (6–)15–50 cm, retrorsely hairy, sometime glabrate, not glaucous.

ascending to erect, (5–)8–30 cm, retrorsely hairy, hairs white, scalelike.

cauline, opposite, subopposite, or whorled, not leathery, glabrous or retrorsely hairy;

cauline 5–9 pairs, petiolate or sessile, (7–)10–50(–52) × (0.5–)1–20 mm, blade oblanceolate to ovate or spatulate, lanceolate to linear distally, base of proximals tapered, distals clasping, margins serrate to serrulate, rarely entire, apex rounded to obtuse, acute, or acuminate.

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

cauline 10–30 pairs, petiolate, 8–16 × 1.5–2.5 mm, blade oblanceolate, base tapered, apex mucronate.

interrupted, cylindric, 6–30 cm, axis ± glandular-pubescent, verticillasters 5–11, cymes 1–6-flowered, 2 per node;

proximal bracts lanceolate to linear, 6–40 × 1–4 mm, margins entire or serrate to serrulate;

peduncles and pedicels ascending to erect, glandular-pubescent.

interrupted or continuous, secund, (1–)2–9 cm, axis retrorsely hairy with appressed, white, scalelike hairs, verticillasters 2–13, cymes 1–4-flowered, 1 per node;

proximal bracts oblanceolate, 2–10 × 0.5–1.5 mm;

peduncles and pedicels spreading to ascending, retrorsely hairy with appressed, white, scalelike hairs, and sparsely glandular-pubescent.

calyx lobes ovate to lanceolate, 2.3–7 × 0.6–1.9 mm, glandular-pubescent;

corolla white to ochroleucous, sometimes tinged lavender, with brownish or purple nectar guides, funnelform, 9–18 mm, glabrate to glandular-pubescent externally, glandular-pubescent internally, sometimes glabrous or glabrate adaxially, tube 4–5 mm, throat slightly inflated, 2.5–5 mm diam., slightly 2-ridged abaxially;

stamens: longer pair slightly exserted, pollen sacs opposite, explanate, 0.4–0.8 mm, dehiscing completely, connective splitting, sides glabrous, sutures papillate;

staminode 8–9 mm, exserted, 0.2–0.3 mm diam., tip straight, glabrous or distal 0.5–2.5 mm sparsely pilose or villous, hairs yellow or white, to 0.5 mm;

style 7–10 mm.

calyx lobes ovate, 3.5–5.5 × 1.5–2 mm, scarious-margined, retrorsely hairy with appressed, white, scalelike hairs, and sparsely glandular-pubescent;

corolla purple to violet, lined internally abaxially with reddish purple nectar guides, tubular-funnelform, 14–18 mm, sparsely white-lanate internally abaxially, tube 5–6 mm, throat gradually inflated, 4.5–6 mm diam., 2-ridged abaxially;

stamens included, filaments glabrous or sparsely puberulent and sometimes with appressed, white, scalelike hairs proximally, pollen sacs opposite, navicular, 0.9–1.4 mm, sutures papillate;

staminode 7–9 mm, reaching orifice or exserted, flattened distally, 0.3–0.4 mm diam., tip straight to recurved, distal 4–5 mm pilose, hairs yellow, to 0.7 mm;

style 9–11 mm.

3–5 × 2.5–4 mm, glabrous.

5–7 × 4–5 mm.