Flora of North America species comparison

trailing;

branches and branchlets yellow-brown or red-brown, glabrous.

branches glabrous or glabrescent;

branchlets yellow-brown, red-brown, or brownish, usually glabrous, rarely pilose.

stipules absent or rudimentary;

petiole 3–46 mm, (sometimes glandular distally);

largest medial blade amphistomatous or hemiamphistomatous, (2 pairs of secondary veins arising at or close to base, arcing toward apex), oblong, broadly oblong, broadly elliptic, subcircular, or circular, (8–)12–66 × 8–50 mm, 1–1.5 times as long as wide, base convex, rounded, subcordate, or cordate, margins slightly revolute, entire or crenulate (glandular-dotted), apex rounded, convex, or retuse, abaxial surface sparsely long-silky to glabrescent, adaxial (venation deeply impressed), slightly or highly glossy, glabrous or pilose;

proximal blade margins entire;

juvenile blade glabrous.

stipules rudimentary to foliaceous on early ones (absent on proximal ones);

petiole deeply grooved adaxially, margins covering groove, 4–26 mm, pubescent or puberulent to glabrescent adaxially;

largest medial blade oblong, narrowly oblong, narrowly elliptic, elliptic, or lanceolate to obovate, 53–114 × 14–35 mm, 2.7–6.3 times as long as wide, base convex or cuneate, margins flat or slightly revolute, crenate or serrulate, apex acuminate, acute, or ± caudate, abaxial surface glabrous or glabrescent, adaxial dull or slightly glossy, glabrous or glabrescent;

proximal blade margins crenate or crenulate;

juvenile blade reddish.

abaxial nectary 0.5–0.9 mm, adaxial nectary oblong or ovate, 0.5–1 mm, nectaries connate and cup-shaped;

filaments distinct, hairy on proximal 1/2 or throughout;

anthers ellipsoid or globose, 0.3–0.4 mm.

abaxial nectary 0.2–1.1 mm, adaxial nectary oblong, square, or ovate, 0.2–0.6 mm, distinct;

filaments distinct, hairy on proximal 1/2;

anthers ellipsoid.

abaxial nectary (0–)0.3–0.5 mm, adaxial nectary narrowly oblong, 0.5–1 mm, equal to or longer than stipe, nectaries distinct or connate and cup-shaped;

stipe 0–0.8 mm;

ovary pyriform or ovoid, short-silky, hairs flattened, beak abruptly tapering to styles;

ovules 8–18 per ovary;

styles connate to distinct 1/2 their lengths, 0.2–0.3 mm;

stigmas flat, abaxially non-papillate with rounded tip, broadly cylindrical, or 2 plump lobes, 0.2–0.26–0.36 mm.

adaxial nectary obovate to square, 0.3–0.5 mm;

ovary pyriform, beak gradually tapering to or slightly bulged below styles;

ovules 30–36 per ovary;

styles distinct 1/2 their lengths, 0.2–0.3 mm;

stigmas flat, abaxially non-papillate with rounded tip, 0.1–0.2 mm.

4.5–5 mm.

3–6 mm.

staminate 11–54 × 4–9 mm, flowering branchlet 2–28 mm; pistillate densely flowered (more than 6 flowers), slender or stout, 11–79 × 3–8 mm, flowering branchlet 2–37 mm;

floral bract tawny, 0.8–1.8 mm, apex rounded to retuse, entire, abaxially glabrous.

staminate 20–60 × 5.5–10 mm, flowering branchlet 3–17 mm; pistillate moderately to very densely flowered, slender to stout, 20–60 × 5–8 mm, flowering branchlet 5–31 mm;

floral bract 1–2.3 mm, apex rounded or acute, abaxially hairy (mainly proximally), hairs wavy.

= 38.

= 38 (44), 57, or 88.