Flora of North America species comparison

gray to brown, deeply furrowed with interlacing ridges.

gray, deeply fissured with broad, flattened ridges.

not winged;

twigs gray-brown, pubescent.

short-spreading, young branches pubescent, old-growth with 3-5 prominent, irregular, corky wings;

twigs reddish, pubescent.

dark brown, ovoid, glabrous;

scales light brown, shiny, glabrous to slightly pubescent.

brown, ovoid, acute, pubescent;

scales brown, pilose on outer surface, ciliate on margins.

blade narrowly elliptic to lanceolate, 2-6.5 × 2-3.5 cm, base generally not oblique, margins singly serrate, apex acute;

surfaces abaxially with some pubescence in axils of veins, adaxially glabrous;

lateral veins forking to 3 times per side.

blade obovate to oblong-oval, (2.5-)9-11(-16) × 2.5-5 cm, base oblique, margins doubly serrate, apex short-acuminate;

surfaces abaxially white-pubescent, pubescence not tufted in axils of veins, adaxially dark green, usually glabrous, sometimes scabrous.

tightly clustered fascicles, 6-15-flowered, 0.5 cm, flowers and fruits not pendulous, sessile.

racemose cymes, long-pendulous, (7-)10(-13)-flowered, to 5 cm;

pedicel 0.5-1 cm.

calyx shallowly lobed, lobes 4-5, glabrous;

stamens 4-8;

anthers brownish red;

stigmas green, lobes exserted.

calyx deeply lobed, divided nearly to middle, lobes 7-8;

stamens 5-8;

anthers dark purple;

stigmas greenish, pubescent.

thickened, not inflated.

inflated, not thickened.

brittle.

hard.

yellow-cream, orbiculate, 10-14 mm diam., broadly winged, glabrous, tip notched 1/3-1/2 its length.

elliptic to oval, 1.5-2.2 cm, narrowly winged, pubescent, margins short-ciliate, apex shallowly notched.

= 28.

= 28.