Flora of North America species comparison

long-trailing;

branches red-brown, glabrous;

branchlets yellow-green, glabrous.

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

petiole (margins covering groove, not glandular or with spherical glands distally), 7–21 mm, glabrous or puberulent adaxially;

largest medial blade (sometimes amphistomatous), very narrowly elliptic, elliptic, lanceolate, or lorate, 55–130 × 24–37 mm, 2.8–6 times as long as wide, base convex, cuneate, or cordate, margins serrulate, apex acuminate to caudate, abaxial surface glaucous, glabrous, adaxial dull, glabrous or sparsely pubescent along midrib;

proximal blade margins entire or shallowly serrulate;

juvenile blade glabrous or pubescent abaxially, hairs white and/or 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.

abaxial nectary 0.2–0.7 mm, adaxial nectary narrowly oblong to square, 0.3–0.8 mm, nectaries distinct;

stamens 3–7;

filaments hairy on proximal 1/2 or basally;

anthers 0.5–0.6 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 square, 0.1–0.6 mm;

stipe 1.4–3.2 mm;

ovary pyriform, beak slightly bulged below styles;

ovules 16–18 per ovary;

styles 0.2–0.4 mm;

stigmas 0.24–0.31–0.4 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.

3–7 mm.

5–7 mm.

staminate 23–80 × 5–12 mm, flowering branchlet 3–28 mm; pistillate 41–110(–127 in fruit) × 8–16 mm, flowering branchlet 17–35 mm;

floral bract 1.5–2.8 mm, apex acute to rounded, entire or toothed, abaxially sparsely to moderately densely hairy proximally, hairs wavy; pistillate bract deciduous after flowering.

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.

= 38.

= 114.