Flora of North America species comparison

branches (highly to ± brittle at base), red-brown, violet or yellow-brown, usually strongly glaucous, glabrescent;

branchlets yellow-brown or red-brown, (usually strongly glaucous), glabrous or densely to sparsely pubescent or tomentose, (buds caprea-type).

stipules foliaceous, apex acute to acuminate;

petiole convex to flat, or shallowly grooved adaxially, 2–6(–9) mm, pilose or villous adaxially;

largest medial blade narrowly to broadly elliptic or narrowly ovate to ovate, 25–92 × 10–45 mm, 1.5–2.6(–3.4) times as long as wide, base convex, cuneate, or rounded, margins slightly revolute or flat, shallowly serrulate or entire, apex acuminate, acute, or convex, abaxial surface glaucous, sparsely pubescent, hairs wavy, adaxial dull to slightly glossy, pilose, sparsely pubescent or glabrous, midrib hairy, (hairs white and ferruginous);

proximal blade margins entire or finely serrulate;

juvenile blade sometimes reddish, sparsely pubescent abaxially, hairs white, sometimes also ferruginous.

stipules absent or rudimentary on early ones, rudimentary, absent, or foliaceous on late ones;

petiole convex to flat, or shallowly grooved adaxially, 3–6.3–14 mm, (sometimes dark spherical glands distally), glabrous or pubescent adaxially;

largest medial blade linear, lorate, or narrowly elliptic 40–79–123 × 6–12–20 mm, (2.3–)4.2–7.2–11.3 times as long as wide, base convex or cuneate, margins strongly or slightly revolute, entire, sinuate or sometimes crenulate, (glands submarginal or epilaminal), apex acuminate to acute, abaxial surface glaucous (sometimes obscured by hairs), densely villous, short-silky, woolly, or tomentose to glabrescent, hairs (white, sometimes also ferruginous), straight or wavy, adaxial slightly to highly glossy, glabrous, sparsely villous or pubescent (hairs white, sometimes also ferruginous);

proximal blade margins entire;

juvenile blade reddish or yellowish green, densely tomentose, short-silky, pubescent, or glabrous abaxially, hairs white, sometimes also ferruginous.

adaxial nectary oblong or square, 0.3–0.7 mm;

filaments distinct or basally connate, glabrous;

anthers purple turning yellow, 0.4–0.6 mm.

adaxial nectary oblong or narrowly oblong, 0.6–1 mm;

filaments distinct, glabrous or hairy basally;

anthers purple turning yellow, ellipsoid, 0.4–0.6 mm.

adaxial nectary square or obovate, 0.3–0.6 mm, usually shorter than stipe;

stipe 0.4–1.2 mm;

ovary pyriform, glabrous, beak gradually tapering to styles;

ovules 12–22 per ovary;

styles connate (sometimes distinct 1/2 their lengths), 0.2–0.5 mm;

stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, or 2 plump lobes, 0.2–0.32–0.44 mm.

adaxial nectary oblong to depressed-ovate, 0.3–1 mm, shorter than or equal to stipe;

stipe 0.5–1.1 mm;

ovary pyriform, short-silky, beak sometimes slightly bulged below styles;

ovules 10–18 per ovary;

styles 0.6–1.5 mm;

stigmas slenderly cylindrical, 0.4–0.55–0.76 mm.

3.2–8 mm.

3.5–6.5 mm.

flowering as leaves emerge; staminate slender, stout, or subglobose, 14.5–34.5 × 8–12 mm, flowering branchlet 1–7 mm; pistillate moderately densely or loosely flowered, slender or stout, 21–59 × 6–16 mm, flowering branchlet 1.5–9 mm;

floral bract brown or bicolor, 1.2–1.8 mm, apex acute to rounded, abaxially glabrate to hairy, hairs straight to wavy.

flowering before leaves emerge; staminate stout, 20–39 × 7–20 mm, flowering branchlet 0–2 mm; pistillate densely flowered, slender, stout, or subglobose, 19–65(–80 in fruit) × 7–17 mm, flowering branchlet 0–7 mm;

floral bract tawny, brown, or black, 1–2.6 mm, apex acute, convex, or rounded, abaxially hairy, hairs straight.

= 38.

= 38.