Flora of North America species comparison

long-trailing;

branches red-brown, glabrous;

branchlets yellow-green, glabrous.

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 foliaceous;

petiole 5–13 mm, (sometimes with 1–2 pairs of spherical glands distally);

largest medial blade hypo-stomatous, broadly elliptic, subcircular, or obovate, 30–50 × 17–30 mm, (1.1–)1.6–1.9(–2.1) times as long as wide, base cuneate, margins flat, closely and prominently serrulate or spinulose-serrulate, (teeth 7–14 per cm), apex acuminate, convex, acute, or rounded, abaxial surface glaucous, glabrous, adaxial slightly glossy, glabrous;

proximal blade margins entire, closely gland-dotted, or serrulate;

juvenile blade glabrous or sparsely long-silky abaxially.

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.

abaxial nectary absent, adaxial nectary square, 0.5–0.9 mm;

filaments distinct, glabrous;

anthers ellipsoid or shortly cylindrical, 0.5–0.6 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.

abaxial nectary absent, adaxial nectary square or oblong, 0.3–1 mm, equal to or longer than stipe;

stipe 0.2–0.4 mm;

ovary obclavate, pilose or villous, hairs ribbonlike, (sometimes in patches or streaks, refractive), beak gradually tapering to styles;

ovules 12–18 per ovary;

styles 0.8–1.2 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, or slenderly cylindrical, 0.4–0.7 mm.

4.5–11 mm.

5–7 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.

staminate 30–64 × 12–22 mm, flowering branchlet 4–28 mm; pistillate densely or moderately densely flowered, stout, 32–73(–105 in fruit) × 10–17 mm, flowering branchlet 4–28 mm;

floral bract brown or black, 1.2–2.8 mm, apex convex or rounded, entire, abaxially moderately densely hairy, hairs straight.

= 76.

= 114.