Flora of North America species comparison

prostrate, short-trailing;

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

branchlets yellow-green or yellow-brown, glabrous or puberulent.

branches (sometimes highly brittle at base), red-brown or yellow-brown, not or weakly glaucous, (slightly or highly glossy), glabrous or villous;

branchlets red-brown or yellow-brown, glabrous or sparsely to very densely villous, (buds caprea-type, inner membranaceous bud-scale layer free and separating or not).

stipules (sometimes marcescent) absent, rudimentary, or foliaceous on early ones, foliaceous on late ones;

petiole (shallowly to deeply grooved adaxially), 2–6.5 mm;

largest medial blade (marcescent), amphistomatous or hypostomatous, ovate, broadly obovate, oblanceolate, or elliptic, 4–23 × 3.5–10 mm, 1.7–3.6 times as long as wide, base convex or cuneate, margins flat, serrulate or crenulate, apex convex, acuminate, acute, or retuse, abaxial surface glaucous, usually glabrous (rarely few hairs), adaxial slightly or highly glossy, usually glabrous (rarely a few hairs);

proximal blade margins entire or serrate;

juvenile blade glabrous, pilose, or puberulent abaxially.

stipules rudimentary or foliaceous on early ones, foliaceous on late ones, apex acute or acuminate;

petiole shallowly grooved, or convex to flat adaxially, 3.5–7.3–13 mm, (sometimes with 2 spherical glands distally), villous, tomentose, pilose, or pubescent adaxially;

largest medial blade narrowly oblong, narrowly elliptic, elliptic, or oblanceolate, 35–61.3–110 × 11–16–46 mm, 2–2.7–5.2 times as long as wide, base convex, rounded, subcordate, or cuneate, margins flat or slightly revolute, (thickened and raised), crenulate or serrulate, apex acuminate, acute, or convex, abaxial surface usually very thickly glaucous, glabrous or pilose, midribs pubescent to tomentose, hairs (white, often also ferruginous), curved, wavy, or straight, adaxial slightly glossy, glabrous or pilose, midribs sparsely pubescent (hairs white, sometimes also ferruginous);

proximal blade margins entire or serrulate;

juvenile blade translucent, reddish or yellowish green, glabrous or sparsely pubescent abaxially, midribs often densely hairy, hairs white, sometimes also ferruginous.

abaxial nectary absent, adaxial nectary narrowly oblong or oblong, 0.4–0.9 mm;

filaments distinct, glabrous;

stamens usually 1, rarely 2;

anthers ellipsoid or shortly cylindrical, 0.4–0.7 mm.

adaxial nectary narrowly oblong, oblong, square, or ovate, 0.44–0.48–1.4 mm;

filaments distinct, glabrous;

anthers yellow, (ellipsoid or globose), 0.52–0.69–0.76 mm.

abaxial nectary absent, adaxial nectary narrowly oblong or oblong, 0.5–0.8 mm, shorter to longer than stipe;

stipe 0.3–1.6 mm;

ovary ovoid or pyriform, glabrous, beak gradually tapering to styles;

ovules 4–9 per ovary;

styles 0.4–1 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.1–0.23–0.4 mm.

adaxial nectary oblong, narrowly oblong, square, or flask-shaped, 0.56–0.8–1.4 mm, shorter than stipe;

stipe 0.96–1.7–3.4 mm;

ovary pyriform, glabrous, beak slightly bulged below styles;

ovules 12–14 per ovary;

styles (sometimes distinct), 0.3–0.8–1.3 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, or slenderly cylindrical, 0.24–0.43–0.56 mm.

3–5 mm.

5–7–11 mm.

staminate 9–19 × 5–8 mm, flowering branchlet 0.5–9 mm; pistillate densely flowered, slender to subglobose, 11–47(–55 in fruit) × 6–10 mm, flowering branchlet 2–10 mm;

floral bract brown, black, tawny, light rose, or bicolor, 1.1–1.8 mm, apex rounded or acute, entire, abaxially sparsely hairy, hairs straight or wavy.

staminate flowering before leaves emerge, pistillate as leaves emerge; staminate stout or slender, 23.5–35.6–51 × 9–12.7–22 mm, flowering branchlet 1–3.9–10 mm; pistillate loosely flowered, stout or slender, 19–42–62(–85 in fruit) × 8–13–18 mm, flowering branchlet 1.5–5.9–13 mm;

floral bract brown or bicolor, 1.2–1.8–3 mm, apex rounded or acute, sometimes toothed, abaxially hairy, hairs straight or wavy.

= 38.