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.

branches (highly brittle at base), yellow-brown or red-brown, weakly glaucous or not, (dull or slightly glossy), velvety or short-silky to glabrescent;

branchlets gray-brown or red-brown, sparsely or moderately densely short-silky or velvety, (buds caprea-type or intermediate).

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 usually rudimentary, sometimes foliaceous on early ones, foliaceous on late ones, apex acute;

petiole shallowly grooved, or convex to flat adaxially, 3–12 mm, short-silky or velvety adaxially;

largest medial blade lorate, narrowly oblanceolate, or oblanceolate, 43–74–103 × 8–25 mm, 2.9–4.8–7.7 times as long as wide, base convex or cuneate, margins slightly revolute to flat, entire, apex acuminate, convex, or acute, abaxial surface glaucous (sometimes obscured by hairs), densely short-silky, hairs straight, adaxial dull (sometimes thinly glaucous) to slightly glossy, sparsely short- or long-silky;

proximal blade margins entire;

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

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 narrowly oblong to oblong, 0.4–0.8 mm;

stamens 1 or 2;

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

anthers purple turning yellow, ellipsoid or shortly cylindrical, 0.6–0.8 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.

adaxial nectary oblong to narrowly oblong or flask-shaped, 0.3–0.6 mm, shorter than or equal to stipe;

stipe 0.4–1.2 mm;

ovary pyriform, densely long-silky, beak gradually tapering to styles;

ovules 13–18 per ovary;

styles 0.4–0.6 mm;

stigmas flat, abaxially non-papillate with rounded to pointed tip, 0.2–0.3 mm.

5–9 mm.

3–5 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 as leaves emerge; staminate stout or subglobose, 16–16.5 × 11–13 mm, flowering branchlet 2.5–3 mm; pistillate moderately densely flowered, slender to stout, 33–55 × 10–11 mm, flowering branchlet 1.5–7 mm;

floral bract brown or tawny, 0.8–2 mm, apex rounded or acute, abaxially hairy, hairs straight.

= 38.