Flora of North America species comparison

ascending to erect, 15–45 cm, retrorsely hairy, hairs pointed, not glaucous.

ascending to erect, (6–)15–42 cm, ± retrorsely hairy or pubescent, not glaucous.

cauline, opposite or subalternate, retrorsely hairy, hairs pointed, not glaucous;

cauline 4–8 pairs, short-petiolate or sessile, 16–70 × 1–8(–14) mm, blade lanceolate to linear, base tapered, margins entire, apex obtuse to acute.

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

basal and proximal cauline 20–70 × 3–16(–22) mm, blade oblanceolate, base tapered, margins entire, apex obtuse to acute;

cauline 2–5 pairs, short-petiolate or sessile, 19–72 × 3–9 mm, blade oblanceolate to lanceolate, base tapered to truncate, apex obtuse to acute.

interrupted, cylindric, 4–15 cm, axis puberulent or retrorsely hairy, verticillasters 3–10, cymes 1–5(–7)-flowered, 2 per node;

proximal bracts lanceolate to linear, 7–50 × 1–6 mm;

peduncles and pedicels ascending to erect, puberulent or retrorsely hairy.

continuous, secund, (4–)10–22 cm, axis retrorsely hairy to retrorsely pubescent or pubescent, verticillasters (3–)5–8, cymes 1–5-flowered, 2 per node;

proximal bracts oblanceolate to lanceolate, 25–70 × 3–9 mm;

peduncles and pedicels retrorsely hairy and glandular-pubescent.

calyx lobes ovate, 3–5.5 × 1.4–2.3 mm, glabrous or sparsely puberulent;

corolla blue to violet or purple, without nectar guides, ampliate, 16–21 mm, glabrous externally, glabrous internally, tube 4–5 mm, throat gradually inflated, 5–6 mm diam., slightly 2-ridged abaxially;

stamens included, filaments glabrous, pollen sacs parallel, 1–1.5(–1.8) mm, distal 1/2–2/3 indehiscent, sides hispidulous, hairs white, to 0.1 mm near filament attachment, sutures denticulate, teeth to 0.1 mm;

staminode 10–12 mm, reaching orifice or barely exserted, 0.5–0.7 mm diam., glabrous;

style 11–13 mm.

calyx lobes ovate, 6–8.5 × 2.8–3.8 mm, glandular-pubescent;

corolla blue to lavender, with or without faint lavender nectar guides, ventricose, 24–30 mm, glandular-pubescent externally, glabrous internally, tube 8–12 mm, throat gradually inflated, slightly constricted at orifice, 6–9(–12) mm diam., slightly 2-ridged abaxially;

stamens: longer pair reaching orifice or slightly exserted, pollen sacs divergent, sigmoid, 2–2.5 mm, dehiscing incompletely, proximal 1/5–1/4 indehiscent, connective not splitting, sides glabrous, sutures denticulate, teeth to 0.1 mm;

staminode 16–18 mm, included, 0.5–0.8 mm diam., tip straight, glabrous;

style 20–24 mm.

6–7 × 4.5–6 mm.

12–15 × 8–10 mm.

= 16.