Flora of North America species comparison

branches yellow-brown, gray-brown, or yellowish, not glaucous, glabrous or puberulent;

branchlets yellow-brown or yellowish (sometimes color obscured by hairs), glabrous, densely to sparsely villous, velvety, or puberulent.

branches flexible to highly brittle at base, yellow-brown, gray-brown, or red-brown, slightly to highly glossy, glabrous or pilose to glabrescent;

branchlets yellow-brown, gray-brown, or red-brown, glabrous, pilose, villous, or velvety, hairs spreading, straight, wavy, or crinkled, (inner membranaceous bud-scale layer free and separating from outer layer).

stipules (not adnate to petioles), rudimentary or absent on early ones, (late ones sometimes brownish, linear, 5.4–10.4 mm), apex acuminate;

petiole shallowly grooved adaxially, 4–13 mm, villous, puberulent, or velvety adaxially;

largest medial blade linear, lorate, narrowly oblong, or narrowly elliptic, 53–130 × 5–33 mm, base cuneate, margins strongly revolute, sinuate or apparently entire, (glands epilaminal), apex acuminate, acute, or convex, abaxial surface apparently glaucous (obscured by hairs), densely short-silky, woolly, or tomentose, (midribs prominent, yellowish, and hairy), hairs appressed, spreading or erect, straight or wavy, adaxial dull or slightly glossy, sparsely or moderately densely pubescent, hairs gray;

proximal blade margins entire;

juvenile blade yellowish green, very densely tomentose or short-silky abaxially, hairs white.

stipules usually foliaceous, apex convex or rounded;

petiole deeply grooved adaxially, (1–)4–30 mm, with pairs or clusters of spherical or foliaceous glands distally, glabrous or pilose adaxially;

largest medial blade hypostomatous, hemiamphistomatous, or amphistomatous, narrowly oblong, very narrowly to narrowly elliptic, narrowly lanceolate to lanceolate, or oblanceolate, 53–170 × 9–31 mm, 3.1–9.8 times as long as wide, base convex or rounded, margins flat, serrulate, apex caudate to acuminate, abaxial surface glaucous or not, glabrescent or pilose, hairs white, sometimes also ferruginous, straight, wavy, or curved, adaxial slightly or highly glossy, glabrous, pilose, or long-silky, hairs white and ferruginous;

proximal blade margins entire and glandular-dotted or shallowly serrulate;

juvenile blade reddish or yellowish green, moderately to very densely villous, long-silky, or glabrous abaxially, hairs white and ferruginous.

adaxial nectary narrowly oblong or oblong, 0.6–1.5 mm;

filaments distinct;

anthers purple turning yellow, ellipsoid to shortly cylindrical, 0.6–0.8 mm.

abaxial nectary (usually present), (0–)0.4–0.8 mm, adaxial nectary square or ovate, 0.2–0.6 mm, nectaries distinct or connate and shallowly cup-shaped;

stamens 3–6;

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

anthers ellipsoid, shortly cylindrical, obovoid, or globose, 0.6–1 mm.

adaxial nectary narrowly oblong or oblong, 0.9–1.4 mm;

ovary pyriform, beak gradually tapering to styles;

ovules 12–18 per ovary;

styles 0.6–1.8 mm.

adaxial nectary square or ovate, 0.2–0.6 mm, shorter than stipe;

stipe 0.8–4 mm;

ovary pyriform, beak slightly bulged below or gradually tapering to styles;

ovules 16–30 per ovary;

styles connate, 0.2–0.8 mm;

stigmas broadly cylindrical or 2 plump lobes, 0.2–0.4 mm.

4–6 mm.

4–11 mm.

flowering just before or as leaves emerge; staminate stout, 24–48 mm, flowering branchlet 0–2 mm; pistillate densely flowered, 23–55 mm, flowering branchlet 0–6 mm;

floral bract brown or tawny, 1.6–2.2 mm, apex convex or rounded, abaxially hairy, hairs straight.

(fruiting in summer, persistent); staminate 21–78 × 8–15 mm, flowering branchlet 3–27 mm; pistillate moderately to very densely flowered, slender, stout, or subglobose, 18.5–103 × 6–17 mm, flowering branchlet 6–56 mm;

floral bract 1.7–4 mm, apex rounded, entire, toothed, or erose, abaxially hairy throughout or proximally, hairs wavy.

= 38.