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 yellow-brown or yellow-gray, not or weakly glaucous, (with sparkling wax crystals, dull or slightly glossy), pilose or villous;

branchlets gray-brown or red-brown, pubescent, villous, or velvety.

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 foliaceous, apex acute or convex;

petiole shallowly grooved adaxially, 4–13 mm, villous or pubescent adaxially;

largest medial blade (amphistomatous), narrowly oblong, narrowly elliptic, elliptic, oblanceolate, or lanceolate, 26–47 × 7.5–15 mm, 2.8–4.1 times as long as wide, base convex, rounded, or subcordate, margins slightly revolute or flat, serrate or serrulate, apex acuminate to acute, abaxial surface glaucous, glabrous, pilose, villous, or long-silky, hairs straight or wavy, adaxial dull, sparsely or moderately densely pilose or long-silky, especially on midrib;

proximal blade margins entire or serrulate;

juvenile blade reddish or yellowish green, sparsely to moderately densely long-silky or pubescent 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 or ovate, 0.7–1.1 mm;

filaments distinct or connate, hairy basally;

anthers yellow, 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, flask-shaped, or narrowly ovate, 0.4–1 mm, shorter than stipe;

stipe 2–4 mm;

ovary pyriform, glabrous, beaks slightly bulged below styles;

ovules 14–18 per ovary;

styles 0.3–0.5 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, 0.16–0.23–0.28 mm.

5–9 mm.

2.5–5 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 just before or as leaves emerge; staminate stout, 16–30 × 8–10 mm, flowering branchlet 1.5–4 mm; pistillate loosely flowered, stout, 18–22 × 9–11 mm, flowering branchlet 3–4 mm;

floral bract brown or tawny, 1.2–1.6 mm, apex acute or rounded, abaxially hairy throughout or proximally, hairs straight or wavy.

= 38.