Flora of North America species comparison

trailing and rooting;

branches yellow-brown or brownish, glabrous;

branchlets yellow-brown, 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 absent or rudimentary;

petiole 4–25 mm, (glabrous or pilose adaxially);

largest medial blade hypostomatous, narrowly elliptic, broadly elliptic, obovate, or very broadly obovate, 19–52 × 10–28 mm, 1–3 times as long as wide, base cuneate or convex, margins flat or slightly revolute, entire, apex convex, retuse, or rounded, abaxial surface glabrous, pilose or sparsely long-silky to glabrescent, hairs straight or wavy, adaxial slightly glossy, glabrous or pilose;

proximal blade margins entire;

juvenile blade (reddish), very 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 oblong, 0.6–1 mm;

filaments distinct;

anthers ellipsoid or shortly cylindrical, 0.4–0.6 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.

adaxial nectary oblong or ovate, 0.7–1.6 mm, equal to or longer than stipe;

stipe 0.5–1.4 mm;

ovary obclavate or pyriform, glabrous, or patchy or streaky pilose or villous, especially on beak, beak gradually tapering to or slightly bulged below styles;

ovules 10–18 per ovary;

styles 0.6–1.8 mm;

stigmas flat, abaxially non-papillate with pointed tip, or slenderly cylindrical, 0.32–0.5–0.68 mm.

3–7 mm.

4–12 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 21–53 × 7–13 mm, flowering branchlet 8–20 mm; pistillate loosely to densely flowered, slender or stout, 32–79 × 7–18 mm, flowering branchlet 4–27 mm;

floral bract brown or black, 1.1–2 mm, apex rounded, entire, abaxially hairy or ciliate, hairs straight.

= 38.

= 38, 57.