Flora of North America species comparison

blades green, usually oblanceolate, sometimes obovate or narrowly elliptic, 10–30 × 3–12 mm, margins usually serrulate from apex to at least mid blade, surfaces usually glandular abaxially, usually glabrous adaxially.

persistent for 1+ years;

blade usually pale green abaxially, dark green adaxially, elliptic, 7–11 × 3–5 mm, coriaceous, margins entire, (often inrolled), surfaces usually glabrous abaxially (rarely minutely hairy along midvein).

calyx pale green, lobes vestigial, glabrous;

corolla white, white with pink striping, or pink, cylindric-urceolate to globose, 4–7 × 3–5 mm, thin, glaucous;

filaments glabrous.

calyx greenish, glabrous;

corolla white tinged with pink or red, ± urceolate, 4–6 mm;

filaments ciliate.

usually blue, glaucous, rarely dull black, 5–9 mm diam.

blue, glaucous, 8–10 mm diam., glabrous.

ca. 1 mm.

10–20, ca. 1 mm.

= 24.

= 24.