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 villous to glabrescent;

branchlets yellow-brown, gray-brown, or red-brown, glabrous, pilose, densely villous, or velvety, hairs spreading, straight, wavy, or crinkled.

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 foliaceous, apex convex to rounded;

petiole shallowly to deeply grooved adaxially, 5–13 mm, with clusters of spherical or foliaceous glands distally, glabrous, pilose, or densely villous adaxially;

largest medial blade usually hypostomatous or hemiamphistomatous, rarely amphistomatous, lorate, very narrowly elliptic, narrowly elliptic, or lanceolate, (24–)55–133 × 11–43 mm, 2.5–6.2 times as long as wide, base convex or cuneate, margins flat, serrulate, apex acuminate to caudate, abaxial surface usually not glaucous (rarely so), glabrous, pilose, or moderately densely villous or long-silky, hairs appressed or spreading, white and/or ferruginous, straight or wavy, (coarse, caducous), adaxial (secondary veins flat or protruding), slightly or highly glossy, glabrous, pilose, or long-silky, hairs white and/or ferruginous;

proximal blade margins entire and glandular-dotted, or serrulate or crenulate;

juvenile blade reddish or yellowish green, glabrous or densely villous or long-silky 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 0.5–1.1 mm, adaxial nectary square or ovate, 0.3–0.9 mm, nectaries connate and cup-shaped;

stamens 3–6;

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

anthers ellipsoid, shortly cylindrical, obovoid, or globose, 0.6–0.8 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, (swollen), 0.2–0.5 mm, shorter than stipe;

stipe 0.5–2 mm;

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

ovules 18–24 per ovary;

styles connate or distinct 1/2 their lengths, 0.5–0.8 mm;

stigmas flat, abaxially non-papillate with rounded tip, broadly cylindrical, or 2 plump lobes, 0.24–0.31–0.42 mm.

4–6 mm.

5–7 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.

staminate 19–69 × 4–14 mm, flowering branchlet 5–23 mm; pistillate (fruiting in summer), moderately densely to loosely flowered, slender to stout, 23–56(–70 in fruit) × 8–12 mm, flowering branchlet 8–25 mm;

floral bract 1.5–3 mm, apex convex or rounded, entire or toothed, abaxially sparsely hairy throughout or proximally, hairs wavy.

= 38.

= 76.