Flora of North America species comparison

branches (sometimes highly brittle at base), red-brown or yellow-brown, not or weakly glaucous, (slightly or highly glossy), glabrous or villous;

branchlets red-brown or yellow-brown, glabrous or sparsely to very densely villous, (buds caprea-type, inner membranaceous bud-scale layer free and separating or not).

stipules absent, rudimentary, or foliaceous on early ones, foliaceous on late ones, (1–16 mm), apex acute or acuminate;

petiole convex to flat adaxially, 2–13 mm, velvety or villous adaxially;

largest medial blade usually oblanceolate, sometimes narrowly elliptic, elliptic or obovate, 29–100 × 9–37 mm, 1.7–3.9 times as long as wide, base cuneate or convex, margins strongly to slightly revolute or flat, entire, remotely serrate, crenate, or sinuate, (glands submarginal or epilaminal), apex acuminate, convex, or rounded, abaxial surface glaucous, sparsely to densely short- to long-silky or woolly, hairs (white, sometimes also ferruginous), wavy or straight, adaxial slightly glossy, pilose or moderately densely short-silky, midrib velutinous or villous, (hairs white, sometimes also ferruginous);

proximal blade margins entire, serrulate, or crenulate;

juvenile blade reddish or yellowish green, sparsely to densely villous, short- or long-silky abaxially, hairs white, sometimes also ferruginous.

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

petiole shallowly grooved, or convex to flat adaxially, 3.5–7.3–13 mm, (sometimes with 2 spherical glands distally), villous, tomentose, pilose, or pubescent adaxially;

largest medial blade narrowly oblong, narrowly elliptic, elliptic, or oblanceolate, 35–61.3–110 × 11–16–46 mm, 2–2.7–5.2 times as long as wide, base convex, rounded, subcordate, or cuneate, margins flat or slightly revolute, (thickened and raised), crenulate or serrulate, apex acuminate, acute, or convex, abaxial surface usually very thickly glaucous, glabrous or pilose, midribs pubescent to tomentose, hairs (white, often also ferruginous), curved, wavy, or straight, adaxial slightly glossy, glabrous or pilose, midribs sparsely pubescent (hairs white, sometimes also ferruginous);

proximal blade margins entire or serrulate;

juvenile blade translucent, reddish or yellowish green, glabrous or sparsely pubescent abaxially, midribs often densely hairy, hairs white, sometimes also ferruginous.

adaxial nectary oblong or square, 0.4–0.9 mm;

filaments distinct, glabrous or hairy on proximal 1/2;

anthers purple turning yellow, ellipsoid to shortly cylindrical, 0.7–1.2 mm.

adaxial nectary narrowly oblong, oblong, square, or ovate, 0.44–0.48–1.4 mm;

filaments distinct, glabrous;

anthers yellow, (ellipsoid or globose), 0.52–0.69–0.76 mm.

adaxial nectary oblong or square, 0.2–0.8 mm, shorter than stipe;

stipe 0.8–2.3 mm;

ovary pyriform or obclavate, densely long-silky, beak slightly bulged below styles;

ovules 10–18 per ovary;

styles 0.2–0.6 mm;

stigmas slenderly cylindrical, 0.4–0.82–1.04 mm.

adaxial nectary oblong, narrowly oblong, square, or flask-shaped, 0.56–0.8–1.4 mm, shorter than stipe;

stipe 0.96–1.7–3.4 mm;

ovary pyriform, glabrous, beak slightly bulged below styles;

ovules 12–14 per ovary;

styles (sometimes distinct), 0.3–0.8–1.3 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, or slenderly cylindrical, 0.24–0.43–0.56 mm.

4.5–11 mm.

5–7–11 mm.

flowering before leaves emerge; staminate stout or subglobose, 18–40.5 × 8–22 mm, flowering branchlet 0–4 mm; pistillate very densely flowered, slender or stout, 18–60(–90 in fruit) × 10–22 mm, flowering branchlet 0–8 mm;

floral bract brown, black, or bicolor, 1.5–4.5 mm, apex rounded or acute, abaxially hairy, hairs straight.

staminate flowering before leaves emerge, pistillate as leaves emerge; staminate stout or slender, 23.5–35.6–51 × 9–12.7–22 mm, flowering branchlet 1–3.9–10 mm; pistillate loosely flowered, stout or slender, 19–42–62(–85 in fruit) × 8–13–18 mm, flowering branchlet 1.5–5.9–13 mm;

floral bract brown or bicolor, 1.2–1.8–3 mm, apex rounded or acute, sometimes toothed, abaxially hairy, hairs straight or wavy.

= 76.