Flora of North America species comparison

blades bright green, broadly elliptic or ovate, 19–27 × 7–11 mm, margins sharply serrate, surfaces laxly 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.

calyx green, lobes ± recurved (or absent and margins of tube sinuate), deltate, 0.4–0.6 mm, glabrous;

corolla pink, cream, or greenish white, globose, 3–5 × 5–7 mm, thin, glaucous;

filaments glabrous.

calyx green, glaucous, glabrous;

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

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

purple-black or bluish black, rarely reddish or red, 7–9 mm diam.

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

ca. 1 mm.

(3–)10–15(–20), ca. 1.2 mm.

= 24, 48.

= 48.