Flora of North America species comparison

trailing and rooting;

branches yellow-brown or brownish, glabrous;

branchlets yellow-brown, glabrous.

stipules foliaceous, apex rounded, convex, acute or acuminate;

petiole convex to flat, or shallowly grooved adaxially, 3–18 mm, glabrous, pilose, or velvety to glabrescent adaxially;

largest medial blade lorate, narrowly oblong, or narrowly elliptic, 60–133 × 12–30 mm, 2.9–6.4 times as long as wide, base rounded, convex, or subcordate, margins flat, usually serrulate or serrate, rarely (apparently) entire, apex acuminate to acute, abaxial surface glaucous, glabrous, sparsely short-silky or pubescent, hairs straight or wavy, adaxial dull, glabrous, sparsely short-silky, or midrib pubescent;

proximal blade margins entire, serrulate, or crenulate;

juvenile blade reddish or yellowish green, glabrous or sparsely to moderately densely pilose or puberulent abaxially, hairs white.

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.

adaxial nectary narrowly oblong, oblong, flask-shaped, or triangular, 0.3–0.8 mm;

filaments distinct or connate less than 1/2 their lengths (or appearing as a single stamen), glabrous or hairy basally;

anthers purple or red turning yellow, (ellipsoid or globose), 0.5–0.8 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 oblong, narrowly oblong, or flask-shaped, 0.3–0.9 mm, shorter than stipe;

stipe 0.9–2.5 mm;

ovary pyriform, glabrous, beak sometimes slightly bulged below styles;

ovules 12–21 per ovary;

styles 0.2–0.6 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.16–0.25–0.4 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.

4–6 mm.

4–12 mm.

flowering as or just before leaves emerge; staminate stout, 20.5–34 × 8–11 mm, flowering branchlet 0–3 mm; pistillate moderately densely flowered, slender to subglobose, 15.5–49 × 8–18 mm, flowering branchlet 1–6 mm;

floral bract brown or bicolor, 0.8–1.6 mm, apex acute or rounded, abaxially hairy throughout or proximally (hairs usually arising from rachis), hairs wavy or curly.

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.