Flora of North America species comparison

ascending;

twigs pubescent, covered with bristly glandular hairs.

ascending;

twigs glabrous to sparsely pubescent, sometimes with glandular hairs.

blade broadly ovate, often with straight sides and slight lobes near apex, giving them squarish appearance, 5–16 × 4–12 cm, moderately thin, base narrowly cordate to narrowly rounded, margins sharply serrate or obscurely doubly serrate, apex abruptly to long-acuminate;

surfaces abaxially sparsely to moderately pubescent, velutinous to tomentose along major veins and in vein axils.

blade nearly orbiculate to narrowly ovate or ovate-oblong, often nearly angular and slightly lobulate near apex, 4–10 × 3.5–12 cm, thin to leathery, base narrowly cordate to narrowly rounded, margins coarsely and often irregularly doubly serrate, apex obtuse to acute or acuminate;

surfaces abaxially glabrous to moderately pubescent, usually pubescent on major veins and in vein axils.

staminate catkins lateral along branchlets on very short shoots, usually in clusters of 1–2, 4–8 × 0.5–0.8 cm;

peduncles mostly 1–5 mm.

staminate catkins lateral along branchlets on short shoots, usually in clusters of 2–3, 4–6 × 0.5–0.8 cm;

peduncles 0.5–10 mm.

buds containing inflorescences broadly ovoid, 3–4 × 3–4 mm, apex obtuse to rounded.

buds containing inflorescences ovoid, 3–5 × 3–4 mm, acute.

in clusters of 2–5, sometimes partially visible;

bracts much enlarged, leaflike, distinct nearly to base, slightly longer than to 2 times length of nuts, apex deeply and irregularly laciniate;

bract surfaces downy-pubescent, abaxially stipitate-glandular.

in clusters of 2–6, completely concealed;

bracts bristly, connate at summit, lengthened into extended tubular beak.

= 22, 28.