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.

deciduous, rarely subpersistent, (usually distichous).

solitary flowers in axils of proximalmost leaves of leafy shoots of current year.

continuous with calyx tube.

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.

sepals 5, (ca. 2 mm);

petals 5, connate for nearly their entire lengths, corolla (closed in bud), globose to urceolate;

stamens 10, included;

anthers with conspicuous awns, tubules ca. 1-2 mm, with terminal pores.

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

5-locular (each locule containing 10-50 ovules).

ca. 1 mm.

(3-)10-35.

= 24.