Flora of North America species comparison

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 absent, rudimentary, or foliaceous on early ones, foliaceous on late ones, (2.5–9 mm), apex rounded or convex;

petiole convex to flat, or shallowly grooved adaxially, 5–11 mm, tomentose or velvety adaxially;

largest medial blade lorate, oblanceolate, or elliptic, 55–96 × 15–34 mm, 2–3.7 times as long as wide, base convex, margins slightly revolute, entire, sinuate or serrulate, apex acuminate to acute, abaxial surface glaucous, sparsely pubescent to moderately densely tomentose or glabrous, hairs (white, sometimes also ferruginous), straight or curved, adaxial slightly glossy, sparsely tomentose to glabrescent;

proximal blade margins entire or serrulate;

juvenile blade reddish, very densely tomentose or puberulent to glabrescent abaxially, 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, or ovate, 0.3–0.8 mm;

filaments connate less to more than 1/2 their lengths;

anthers purple turning yellow, ellipsoid, shortly cylindrical, or globose, 0.36–0.44 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, or narrowly oblong to flask-shaped, 0.2–0.6 mm;

stipe 1–1.7(–2.4) mm;

ovary pyriform, beak sometimes slightly bulged below styles;

ovules 12 per ovary;

styles 0.1–0.6 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, 0.1–0.3 mm.

4.5–11 mm.

2.4–3.6 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.

flowering as or just before leaves emerge; staminate stout, 17–30 × 7–9 mm, flowering branchlet 1.5–5 mm; pistillate very densely flowered, stout to slender, 17–42 × 6–11 mm, flowering branchlet 1.5–3 mm;

floral bract brown or bicolor, 0.8–1.6 mm, apex rounded to truncate, abaxially hairy throughout or proximally, hairs wavy or straight.

= 76.