Flora of North America species comparison

blades pale green abaxially, lustrous dark green adaxially, narrowly ovate, 21–29 × 8–12 mm, coriaceous, margins sharply serrate, surfaces glandular abaxially.

deciduous;

blade dark to pale green or glaucous, elliptic to narrowly elliptic, 15–41 × (5–)6–16(–20) mm, margins usually sharply, uniformly serrate (serrations sometimes minute, tipped with stipitate gland), surfaces glabrous or hairy, especially along abaxial midvein, eglandular abaxially.

corolla pinkish, 3–5 mm;

filaments hairy.

calyx green, glaucous, glabrous;

corolla usually white, cylindric to urceolate, 4–6 mm;

filaments ciliate; (tubules with introrse, elongate pores).

black or blue, 6–8 mm diam. 2n = 24.

black or blue, rarely white, 3–12 mm diam., glabrous.

(3–)10–15(–20), ca. 1.2 mm.

= 48.