Flora of North America species comparison

trailing;

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

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 (sometimes marcescent), foliaceous, (3–23 mm), apex acuminate to acute;

petiole convex to flat, or shallowly grooved adaxially, 3–20 mm, tomentose adaxially, (strongly ventricose around floral buds);

largest medial blade broadly oblong, narrowly oblong, narrowly elliptic to elliptic, narrowly oblanceolate, oblanceolate, obovate, or broadly obovate, 50–110 × 13–35 mm, 2–4 times as long as wide, base cuneate or convex, margins strongly revolute, entire or crenate, apex acuminate, acute, or convex, abaxial surface glaucous or not (usually obscured by hairs, midrib yellowish), densely tomentose or villous-tomentose, hairs wavy, adaxial dull, sparsely or moderately densely villous (floccose) to glabrescent, (hairs white or gray);

proximal blade margins entire;

juvenile blade reddish or yellowish green (color often obscured by hairs), very densely woolly-tomentose abaxially, hairs white.

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.

adaxial nectary narrowly oblong to oblong, 0.5–1.4 mm;

filaments distinct;

anthers purple turning yellow, long-cylindrical, 0.6–0.9 mm.

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 narrowly oblong, 0.6–1.6 mm;

stipe 0–0.4 mm;

ovary pyriform, (hairs refractive, wavy), beak gradually tapering to styles;

ovules 14–18 per ovary;

styles 1.3–2.8 mm;

stigmas 0.4–0.99–1.28 mm.

4.5–5 mm.

4–5 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.

flowering before leaves emerge; staminate stout, 23–55 × 13–27 mm, flowering branchlet 0–6 mm; pistillate densely flowered, slender to stout, 33–103 × 8–22 mm, flowering branchlet 0–13 mm;

floral bract brown or black, 1.5–2–2.5 mm, apex acute to convex, abaxially sparsely hairy, hairs straight.

= 38.