Flora of North America species comparison

trailing or erect;

branches yellow-brown or red-brown, glabrous or pubescent;

branchlets yellow-brown or red-brown, glabrous or pilose.

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 1.5–7 mm (sometimes glandular distally or throughout);

largest medial blade hypostomatous, (veins impressed-reticulate, 2 pairs of secondary veins arising at or close to base, arcing toward apex,), elliptic to broadly elliptic, 6–22 × 4–15 mm, 1.1–2.8 times as long as wide, base convex, rounded, subcordate, or cuneate, margins slightly revolute, entire (glandular-dotted), apex convex, rounded, or retuse, abaxial surface glabrous or with long-silky hairs, adaxial slightly glossy, glabrous;

proximal blade margins entire;

juvenile blade glabrous.

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 0.5–1.3 mm, adaxial nectary narrowly oblong, oblong, or square, 0.5–1.2 mm, nectaries connate and cup-shaped;

filaments distinct, glabrous or hairy basally;

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.

abaxial nectary (0–)0.2–0.5 mm, adaxial nectary oblong, 0.2–1 mm, longer than stipe, nectaries distinct or connate and shallowly cup-shaped;

stipe 0–0.8 mm;

ovary obturbinate, short-silky, hairs flattened, beak abruptly tapering to styles;

ovules 8–10 per ovary;

styles distinct to connate 1/2 their lengths, 0.2–0.4 mm;

stigmas flat, abaxially non-papillate with rounded tip, 0.2–0.26–0.36 mm.

4–6 mm.

3–4 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 7–19 × 2.5–6 mm, flowering branchlet 0.5–17 mm; pistillate densely to loosely flowered (4–17 flowers), stout, subglobose or globose, 7–21 × 2–9 mm, flowering branchlet 1–10 mm;

floral bract tawny or light rose, 0.8–1.8 mm, apex rounded, entire, abaxially glabrous.

= 38.

= 38.