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 ± brittle at base, gray-brown to red-brown, glabrous, villous, or tomentose;

branchlets yellow-brown to red-brown, glabrous, sparsely or densely villous or tomentose.

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 rudimentary or foliaceous on early ones, foliaceous on late ones, apex convex to acute;

petiole (with spherical glands distally), (3–)4.5–14(–22) mm, tomentose or pilose adaxially;

largest medial blade lorate or lanceolate to narrowly lanceolate, (50–)75–115(–220) × 10–22(–35) mm, 5–10 times as long as wide, base usually convex or cuneate, sometimes rounded to cordate, margins serrate or serrulate, apex acuminate, acute, or caudate, abaxial surface glabrous or sparsely tomentose on midribs, hairs white and/or ferruginous, wavy, adaxial highly glossy, glabrous or pilose, hairs white and/or ferruginous;

proximal blade margins entire or serrulate;

juvenile blade glabrous, or moderately densely tomentose or 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 0.3–0.5 mm, adaxial nectary oblong to narrowly oblong, 0.3–0.6 mm, nectaries distinct;

stamens 4–7;

filaments (sometimes connate less than 1/2 their lengths), hairy basally;

anthers 0.4–0.6 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 oblong, square, or ovate, 0.3–0.7 mm;

stipe 1.3–5.3 mm;

ovary pyriform to obclavate, beak slightly bulged below styles;

ovules 12–16 per ovary;

styles (sometimes distinct distally), 0.1–0.2 mm;

stigmas 0.16–0.2–0.28 mm.

4–6 mm.

4–6 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 28–97 × 5–11 mm, flowering branchlet 4–25 mm; pistillate 33–93 × 7–15 mm, flowering branchlet 3–35 mm;

floral bract 1–3 mm, apex acute or rounded, entire or erose, abaxially sparsely hairy, hairs wavy; pistillate bract deciduous after flowering.

= 38.