Flora of North America species comparison

erect, decumbent or trailing;

branches gray-brown, glabrous;

branchlets yellow-brown or red-yellow, glabrous or puberulent (hairs straight, minute, inner membranaceous bud-scale layer free, not separating from outer layer).

stipules absent, rudimentary, or foliaceous on early ones, foliaceous on late ones, (1–16 mm), apex acute or acuminate;

petiole convex to flat adaxially, 2–13 mm, velvety or villous adaxially;

largest medial blade usually oblanceolate, sometimes narrowly elliptic, elliptic or obovate, 29–100 × 9–37 mm, 1.7–3.9 times as long as wide, base cuneate or convex, margins strongly to slightly revolute or flat, entire, remotely serrate, crenate, or sinuate, (glands submarginal or epilaminal), apex acuminate, convex, or rounded, abaxial surface glaucous, sparsely to densely short- to long-silky or woolly, hairs (white, sometimes also ferruginous), wavy or straight, adaxial slightly glossy, pilose or moderately densely short-silky, midrib velutinous or villous, (hairs white, sometimes also ferruginous);

proximal blade margins entire, serrulate, or crenulate;

juvenile blade reddish or yellowish green, sparsely to densely villous, short- or long-silky abaxially, hairs white, sometimes also ferruginous.

stipules absent or rudimentary;

petiole (deeply to shallowly grooved adaxially), 3–8 mm, (glabrous or puberulent);

largest medial blade narrowly oblong, oblong, narrowly to broadly elliptic, narrowly oblanceolate or oblanceolate, 19–53(–69) × 5–20 mm, 1.8–4.9 times as long as wide, base convex or rounded, margins flat or slightly revolute, entire, apex acute, convex, or rounded, abaxial surface glabrous, adaxial dull, glaucous, glabrous (rarely very sparsely short-silky, hairs usually white, sometimes also ferruginous);

proximal blade margins entire;

juvenile blade (reddish or yellowish green), glabrous, puberulent, or sparsely pubescent abaxially, (hairs usually white, sometimes also ferruginous).

adaxial nectary oblong or square, 0.4–0.9 mm;

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

anthers purple turning yellow, ellipsoid to shortly cylindrical, 0.7–1.2 mm.

abaxial nectary absent, adaxial nectary oblong or narrowly oblong, 0.5–1.1 mm;

filaments distinct or connate less than 1/2 their lengths, glabrous, or hairy basally or on proximal 1/2;

anthers (yellow), ellipsoid, 0.4–0.6 mm.

adaxial nectary oblong or square, 0.2–0.8 mm, shorter than stipe;

stipe 0.8–2.3 mm;

ovary pyriform or obclavate, densely long-silky, beak slightly bulged below styles;

ovules 10–18 per ovary;

styles 0.2–0.6 mm;

stigmas slenderly cylindrical, 0.4–0.82–1.04 mm.

abaxial nectary absent, adaxial nectary oblong, 0.2–1.4 mm, shorter than stipe;

stipe 2.1–3.2 mm;

ovary obclavate, often glaucous, glabrous, beak abruptly tapering to styles;

ovules 4–6 per ovary;

styles connate or distinct 1/2 their lengths, 0.1–0.2 mm;

stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.2–0.25–0.36 mm.

4.5–11 mm.

4–8 mm.

flowering before leaves emerge; staminate stout or subglobose, 18–40.5 × 8–22 mm, flowering branchlet 0–4 mm; pistillate very densely flowered, slender or stout, 18–60(–90 in fruit) × 10–22 mm, flowering branchlet 0–8 mm;

floral bract brown, black, or bicolor, 1.5–4.5 mm, apex rounded or acute, abaxially hairy, hairs straight.

staminate 11–21 × 4–8 mm, flowering branchlet 3–12 mm; pistillate loosely flowered, stout or subglobose, 14–37 × 5–14 mm, flowering branchlet 7–25 mm;

floral bract tawny or light rose, 0.8–1.6 mm, apex rounded, entire, abaxially very sparsely hairy distally, hairs straight or wavy.

= 76.

= 38, 57, 76.