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 red-brown, glabrous or glabrescent;

branchlets yellow-green, red-brown, or violet, tomentose or pubescent to glabrescent.

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 absent or rudimentary;

petiole 0–4(–8) mm, pubescent or short-silky adaxially;

largest medial blade linear, 66–95(–140) × 2–16 mm, 11–35 times as long as wide, base cuneate, margins flat, remotely spinulose-serrulate, apex acute to subacuminate, abaxial surface very thinly glaucous, sparsely short-silky (especially along midrib), to glabrescent, adaxial slightly glossy, short-silky, pilose to glabrescent;

proximal blade margins entire;

juvenile blade reddish or yellowish green, moderately densely to sparsely long-silky to glabrescent abaxially.

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 absent, adaxial nectary ovate, narrowly oblong, or flask-shaped, 0.6–1.4 mm;

filament hairy;

anthers 0.3–0.8 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 narrowly oblong to ovate, 0.4–0.7 mm, shorter to longer than stipe;

stipe 0–0.8 mm;

ovary obclavate to pyriform, densely long-silky or villous, beak abruptly tapering to styles;

ovules 16–36 per ovary;

styles 0–0.2 mm;

stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, 0.3–0.7 mm.

4–6 mm.

(2.5–)4–7 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 8–35 × 6 mm, flowering branchlet 3–55 mm; pistillate loosely flowered, slender, 15–40(–50) × 3.2–8 mm, flowering branchlet 7–28 mm;

floral bract 2–4 mm, apex acute or acuminate, entire, abaxially hairy, hairs wavy.

= 38.