Flora of North America species comparison

light brown with shallow ridges and large plates.

light brown to gray with shallow ridges and plates.

often with opposite corky wings;

twigs reddish brown, pubescent.

young and old-growth branches with opposite, prominent, regular corky wings;

twigs reddish brown, pubescent to glabrous.

brown, apex acute, pubescent;

scales dark brown, shiny, glabrous.

apex acute;

scales brown to rusty, slightly pubescent.

blade ovate to elliptic, 2.5-5 × 1.3-2 cm, base oblique or rounded to cuneate, margins crenate to doubly serrate, apex obtuse;

surfaces abaxially softly pubescent, adaxially harshly pubescent.

blade lanceolate to oblanceolate, 3-6.9 × 0.6-3.2 cm, base somewhat cordate to oblique, margins doubly serrate, apex acute;

surfaces abaxially with trichomes on veins, tufts of pubescence in axils of veins, adaxially glabrous to scabrous.

fascicles, 2-5-flowered, 0.5 cm;

pedicel 0.75-1 cm.

short racemes, not pendulous, less than 2.5 cm;

pedicel 2-7 mm, not fully expanded until fruiting stage.

calyx deeply lobed, more than 1/2 its length, lobes 6-9, hairy;

stamens 5-6, anthers reddish purple;

stigmas white, pubescent, exserted and spreading.

calyx deeply lobed, symmetric, lobes 5;

stamens 5;

anthers red.

somewhat thickened, not inflated.

slightly thickened, not inflated.

hard.

hard.

green to tan, elliptic to oval, ca. 0.75-1 cm, pubescent, margins ciliate, cilia ca. 0.5 mm.

gray-tan, often reddish tinged, lanceolate to oblong-elliptic, ca. 8 mm, narrowly winged, margins ciliate, cilia white, 1-2 mm.

= 28.

= 28.