Flora of North America species comparison

branches (highly brittle at base), red-brown, not glaucous, tomentose or velvety to glabrescent;

branchlets red-brown or yellow-brown, densely velvety, (buds caprea-type).

stipules absent or rudimentary on early ones, rudimentary or foliaceous on late ones, apex acute;

petiole convex to flat, or shallowly grooved adaxially, 6–16 mm, velvety or tomentose adaxially;

largest medial blade elliptic or obovate, 53–102 × 29–54 mm, 1.3–2.8 times as long as wide, base cuneate or convex, margins slightly revolute, entire or sinuate, apex convex, rounded, or acute, abaxial surface glaucous (sometimes obscured by hairs), densely to sparsely velvety, tomentose, villous, or short-silky, hairs erect or spreading, wavy, adaxial dull, sparsely tomentose or short-silky;

proximal blade margins entire;

juvenile blade green, very densely velvety or long-silky abaxially, hairs white or gray.

stipules (sometimes marcescent), foliaceous, 3.5–10–23 mm, 1–1.4–2.8 times as long as wide, usually lanceolate, ovate, or suborbiculate, (pleated when pressed), apex rounded, convex, or acute;

petiole shallowly grooved adaxially, 3–11.3–26 mm, villous adaxially;

largest medial blade elliptic to broadly elliptic, 36–65–100 × 17–35.5–85 mm, 1.1–1.9–2.9 times as long as wide, base convex, rounded, subcordate, or cordate, margins thickened, serrulate or spinulose-serrulate (sometimes teeth absent, margins with spherical glands), apex acuminate, acute, or convex, abaxial surface glaucous or not, pilose or villous, hairs curved, adaxial dull, pilose or villous to glabrescent;

proximal blade margins entire (glands only) or serrulate;

juvenile blade green, glabrous, pilose, or moderately densely villous abaxially, hairs white.

adaxial nectary narrowly oblong to oblong, 0.5–1 mm;

filaments distinct or slightly connate, glabrous;

anthers purple turning yellow, ellipsoid, 0.6–0.7 mm.

adaxial nectary oblong, 0.6–1.2 mm;

filaments distinct, glabrous or hairy basally;

anthers yellow or purple turning yellow, 0.6–1 mm.

adaxial nectary narrowly oblong to oblong, 0.4–0.9 mm, longer than stipe;

stipe 0–0.3 mm;

ovary obturbinate, short-silky or densely pubescent, beak gradually tapering to styles;

ovules 14–18 per ovary;

styles 0.6–1.2 mm;

stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.2–0.32–0.4 mm.

adaxial nectary oblong, narrowly oblong, or square, 0.5–1 mm, (unlobed), shorter to longer than stipe;

stipe 0.4–1.5 mm;

ovary pyriform, beak gradually tapering to styles;

ovules 18–30 per ovary;

styles 1.1–2.8 mm;

stigmas slenderly cylindrical, 0.32–0.53–1 mm.

4 mm.

4–7 mm.

flowering before leaves emerge; staminate stout, 25–30 × 6–13 mm, flowering branchlet 0–5 mm; pistillate moderately densely flowered, slender to stout, 17–53 × 6–8 mm, flowering branchlet 1–3 mm;

floral bract brown, 1.2–2.2 mm, apex rounded, abaxially hairy, hairs straight.

flowering before leaves emerge; staminate stout, 39–56 × 14–22 mm, flowering branchlet 0–2 mm; pistillate densely flowered, stout, 39–70(–110 in fruit) × 13–22 mm, flowering branchlet 0–2 mm;

floral bract dark brown, 1.8–4 mm, apex acute or rounded, abaxially sparsely hairy, hairs straight or wavy.