Flora of North America species comparison

ascending to erect, 18–85 cm, glabrous, not glaucous.

ascending to erect, 40–90 cm, retrorsely hairy proximally, usually retrorsely hairy distally, not glaucous.

basal and cauline, ± leathery or not, glabrous, not glaucous;

basal and proximal cauline 55–250 × 7–40 mm, blade lanceolate to elliptic, base tapered, margins entire, apex obtuse to acute;

cauline 3–5 pairs, short-petiolate or sessile, 40–83 × 10–36 mm, blade ovate to lanceolate, base tapered to clasping, apex obtuse to acute.

basal and cauline, basal sometimes withering by anthesis, not leathery, glabrate to puberulent;

basal and proximal cauline 40–150 × 10–26 mm, blade oval to elliptic, base tapered, margins entire or ± denticulate, apex rounded to obtuse;

cauline 7 or 8 pairs, sessile, 17–110 × 3–20 mm, blade oblanceolate to lanceolate, base tapered to clasping, margins entire or denticulate to serrulate, apex obtuse to acute.

continuous, cylindric, 4–35 cm, axis glabrous, verticillasters 4–11, cymes 1–6-flowered, 2 per node;

proximal bracts ovate to lanceolate, 22–85 × 11–35 mm;

peduncles and pedicels glabrous, peduncles to 20 mm, pedicels 1–6 mm.

interrupted, conic, 11–22 cm, axis glabrous or sparsely glandular-pubescent, verticillasters 4–6, cymes (2–)5–8-flowered, 2 per node;

proximal bracts lanceolate, 10–15 × 3–5 mm, margins entire;

peduncles and pedicels ascending to erect, glabrous or sparsely glandular-pubescent.

calyx lobes ovate to lanceolate, (5.3–)6.5–8.5 × 1.6–3 mm, apex acuminate to caudate, glabrous;

corolla blue to violet or purple, with reddish purple nectar guides, ventricose, 29–35 mm, glabrous externally, glabrous internally, tube 8–11 mm, throat gradually inflated, not constricted at orifice, 9–10 mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice, pollen sacs divergent to opposite, sigmoid, 2–2.7 mm, dehiscing incompletely, proximal 1/5–1/3 indehiscent, connective not splitting, sides sparsely hirsute, hairs white or tan, to 0.1 mm, especially near connective, sometimes merely scurfy near connective, sutures denticulate, teeth to 0.1 mm;

staminode 16–20 mm, reaching orifice, 0.5–1 mm diam., tip straight, distal 4–6 mm ± uniformly sparsely pilose, hairs yellow, to 1 mm;

style 20–24 mm.

calyx lobes ovate, 1.5–3.5(–4) × 0.9–1.5 mm, sparsely glandular-pubescent;

corolla white, sometimes tinged lavender or purple, with reddish purple nectar guides, ventricose, 15–20(–22) mm, glandular-pubescent externally, sparsely white-pubescent internally abaxially, tube 5–6 mm, throat abruptly inflated, 5–7 mm diam., slightly 2-ridged abaxially;

stamens included, pollen sacs opposite, navicular, 0.8–1 mm, dehiscing completely, connective splitting, sides glabrous, sometimes sparsely pubescent, hairs white, to 0.2 mm, sutures papillate;

staminode 8–10 mm, reaching orifice, 0.3–0.4 mm diam., tip straight to slightly recurved, distal 3–4 mm pilose, hairs yellowish, to 1 mm;

style 10–12 mm.

10–13 × 8–10 mm.

5–8 × 4–5 mm, glabrous.