Flora of North America species comparison

gray, deeply furrowed, warty with age.

light gray, furrowed, warty.

without thorns, spreading, young branches mostly pubescent.

without thorns, upright to spreading, irregular.

blade lance-ovate to broadly ovate or deltate, 5-12 × 3-6(-9) cm (on fertile branches), leathery, base oblique or obliquely somewhat acuminate, margins conspicuously serrate to well below middle, teeth 10-40, apex acuminate;

surfaces scabrous.

blade ovate to occasionally ovate-elliptic, (2-)5-8 × (1-)3-4 cm, base unequal, 1 side rounded, margins mostly entire, serrate and sparingly toothed toward apex, apex blunt, acute, or short-acuminate;

surfaces abaxially gray-green, harshly pubescent, adaxially dark gray-green, scabrous.

dense pendulous clusters.

flowers solitary or few-flowered clusters.

dark orange to purple- or blue-black when ripe, orbicular, to 7-11(-20) mm diam., commonly with thick beak;

pedicel to 15 mm.

orange to brown or cherry red, glaucous, orbicular, 5-8 mm diam., beakless;

pedicel 3-13 mm.

light yellow, weak.

cream colored, 7-9 × 5-8 mm, reticulate.

cream colored, 5-7 × 5-6 mm, reticulate.

= 20, 30, and 40.