Flora of North America species comparison

trailing;

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

branches and branchlets red-brown, not to strongly glaucous, glabrous, (buds caprea-type or intermediate).

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 or foliaceous (often brownish) on early ones, foliaceous or rudimentary on late ones, (ca. 4 mm), apex acute;

petiole convex to flat, or shallowly grooved adaxially, 1–3.4–16 mm, glabrous, pilose, or short-silky adaxially;

largest medial blade (amphistomatous), narrowly elliptic, elliptic, oblanceolate, or obovate, 15–29–65 × 3.5–8.8–18 mm, 2.3–3.3–4.4 times as long as wide, base cuneate or convex, margins strongly to slightly revolute, entire, or very shallowly serrulate or shallowly serrulate-crenulate, apex acute, acuminate, or convex, abaxial surface glaucous, sparsely long-silky to glabrescent, hairs (ferruginous), straight, adaxial highly glossy, glabrous or sparsely short-silky (hairs white, sometimes also ferruginous);

proximal blade margins entire;

juvenile blade yellowish green or sometimes reddish, sparsely long-silky abaxially, hairs white and ferruginous.

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 oblong, 0.8–1.1 mm;

filaments distinct, glabrous or hairy basally;

anthers purple turning yellow, ellipsoid, 0.4–0.7 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 oblong or flask-shaped, 0.6–1.1 mm, equal to or shorter than stipe;

stipe 0.2–1 mm (–1.4 mm in cultivation);

ovary pyriform, long-silky, beak gradually tapering to styles;

ovules 12–16 per ovary;

styles 0.6–1.2 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.44–0.55–0.75 mm.

4.5–5 mm.

3.6–5 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, 14–35 × 12–16 mm, flowering branchlet 0 mm; pistillate densely flowered, stout, 17–51 × 10–13–22 mm, flowering branchlet 0–4 mm;

floral bract brown, black, or bicolor, 1–3.7 mm, apex acute to acuminate or rounded, abaxially hairy, hairs long, straight.

= 38.