Flora of North America species comparison

branches divaricate, sometimes ± brittle at base, yellow-brown to dark red-brown, not or weakly glaucous, pilose to glabrescent, peeled wood often with very dense striae, to 25 mm;

branchlets yellow-green or red-brown, moderately to very densely villous to glabrescent.

stipules rudimentary or absent on early ones, apex acute, acuminate, or convex;

petiole convex to flat adaxially, 2–5.5–13 mm, pubescent adaxially;

largest medial blade narrowly oblong, narrowly elliptic, elliptic, oblanceolate, or obovate, 20–44–87 × 10–16–45 mm, base cuneate, convex, or rounded, margins flat, entire, crenate, or irregularly serrate, glands submarginal, apex acute, acuminate, or convex, abaxial surface glaucous, moderately densely pubescent or long-silky to glabrescent, hairs white or gray, wavy, adaxial finely impressed-reticulate, dull or slightly glossy, moderately densely pubescent, sparsely short-silky, or glabrescent, hairs white or gray;

proximal blade margins entire, gland-dotted;

juvenile blade yellowish green or reddish, pilose or sparsely to moderately densely tomentose or long-silky abaxially, hairs white.

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

petiole shallowly grooved adaxially, 3–7 mm, tomentose adaxially;

largest medial blade lorate, very narrowly elliptic, or oblanceolate, 58–144 × 11–30 mm, 2.8–7 times as long as wide, base convex or cuneate, margins slightly revolute, entire, irregularly serrate, serrulate, or sinuate, apex convex, acute, or acuminate, abaxial surface glaucous (sometimes obscured by hairs), sparsely to densely tomentose or woolly, hairs wavy, adaxial slightly glossy or dull, sparsely tomentose or villous;

proximal blade margins entire;

juvenile blade reddish or yellowish green, densely long-silky abaxially, hairs white or gray.

adaxial nectary oblong or ovate, 0.3–0.8 mm;

filaments distinct or connate less than 1/2 their lengths, glabrous or hairy on proximal 1/2;

anthers yellow or purple turning yellow, ellipsoid or shortly cylindrical, 0.5–0.8 mm.

adaxial nectary very narrowly oblong, 0.8–1.4 mm;

filaments distinct or connate basally, glabrous;

anthers yellow, ellipsoid or globose, 0.4–0.6 mm.

adaxial nectary oblong or square, 0.3–0.8 mm;

ovary obclavate, beak slightly bulged below styles (long-beaked);

ovules 6–16 per ovary;

styles 0.1–0.4 mm;

stigmas slenderly to broadly cylindrical.

(abaxial nectary rarely present), adaxial nectary narrowly oblong to oblong, 0.6–1.5 mm, longer than stipe, (nectaries distinct);

stipe 0–0.4 mm;

ovary squat, flask-shaped, very densely tomentose, beak abruptly tapering to styles;

ovules 4–12 per ovary;

styles (sometimes distinct), 0.4–0.8 mm;

stigmas flat, abaxially non-papillate with rounded tip, 0.16–0.24 mm.

5–9 mm.

4–6 mm.

staminate flowering just before leaves emerge, pistillate flowering as leaves emerge; staminate stout to globose, 10–42 × 7–16 mm, flowering branchlet 0.5–11 mm; pistillate loosely flowered, stout, slender, or subglobose, 16.5–85 × 9–32 mm, flowering branchlet 1–26 mm;

floral bract tawny, 1.2–3.2 mm, apex rounded, abaxially hairy to glabrescent, hairs straight or wavy.

flowering before leaves emerge; staminate slender, stout, or subglobose, 12–47 × 7–12 mm, flowering branchlet 0–1 mm; pistillate moderately densely flowered, slender, 19–59(–80 in fruit) × 5–10 mm, flowering branchlet 0–1 mm;

floral bract tawny or light rose, 0.8–1.5 mm, apex rounded, abaxially hairy, hairs straight.

= 38.