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.

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, (prominent, 5–9–15 mm), apex rounded to acute, sometimes acuminate;

petiole (usually reddish), shallowly grooved, or convex to flat adaxially, 6–20 mm, short-silky or velvety adaxially;

largest medial blade broadly to narrowly elliptic, or ovate to broadly obovate, (25–)30–86(–118) × 12–51 mm, 1.4–3 times as long as wide, base convex, rounded, cuneate, subcordate, cordate, or sometimes irregularly lobed, margins flat, serrulate or crenate, apex acute, acuminate, or convex, abaxial surface glaucous, glabrous, pubescent, or pilose, hairs wavy, adaxial slightly glossy or dull, glabrous, puberulent, pubescent, or pilose, midrib hairy;

proximal blade margins entire or serrulate;

juvenile blade reddish, glabrous or pubescent abaxially, hairs white, sometimes also 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.

adaxial nectary oblong, 0.3–1 mm;

filaments distinct or connate less than 1/2 their lengths, glabrous;

anthers purple turning yellow, 0.4–0.5 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, flask-shaped, 0.3–0.8 mm, shorter than stipe;

stipe 0.5–0.8–3 mm;

ovary pyriform or obclavate, glabrous, beak gradually tapering to styles;

ovules 18 per ovary;

styles (0.5–)0.7–1.8 mm;

stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.1–0.21–0.29 mm.

4–6 mm.

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.

flowering before leaves emerge; staminate stout, 16–39 × 10–12 mm, flowering branchlet 0 mm; pistillate densely or moderately densely flowered, slender to globose, 17–73 × 8–20 mm, flowering branchlet 0–5 mm;

floral bract brown or black, 1–2.4 mm, apex rounded or acute, abaxially hairy, hairs straight.

= 38.

= 38.