Flora of North America species comparison

branches (sometimes flexible to highly brittle at base), yellow-brown to red-brown, not or weakly glaucous, glabrous, tomentose, pubescent (appearing dusty);

branchlets yellowish, yellow-brown, or red-brown, sparsely to densely villous, tomentose, or velvety to glabrescent, (inner membranaceous bud-scale layer free, separating from outer layer).

stipules (sometimes marcescent), foliaceous, (resinous, 1.5–7.5 mm), apex acute;

petiole shallowly grooved, or convex to flat adaxially, 4–15 mm, villous or puberulent adaxially, (weakly ventricose around floral buds);

largest medial blade narrowly to broadly elliptic, oblanceolate, or obovate, 35–95 × 10–29 mm, 2.2–4.2(–5) times as long as wide, base usually convex, rounded, or cuneate, sometimes cordate, margins flat, entire, apex acute, convex, or acuminate, abaxial surface not glaucous, moderately to very densely long-silky tomentose to glabrescent, hairs wavy, adaxial slightly glossy, sparsely villous or pubescent to glabrescent;

proximal blade margins entire;

juvenile blade color sometimes obscured by hairs, very densely long-silky abaxially, hairs white.

stipules usually foliaceous, or rudimentary or absent on early ones, foliaceous on late ones, apex acute;

petiole convex to flat, or shallowly grooved adaxially, 3–16 mm, tomentose or velvety adaxially;

largest medial blade lorate, narrowly oblong, narrowly elliptic, oblanceolate, or obovate to broadly obovate, 36–125 × 6–32 mm, 1.9–9.6 times as long as wide, base cuneate or convex, margins slightly to strongly revolute, entire or remotely or irregularly serrate, sinuate, (glands submarginal or epilaminal), apex acute, acuminate, convex or rounded, abaxial surface glaucous, sparsely pubescent, moderately densely tomentose or woolly-tomentose, short- or long-silky to glabrescent, hairs (white, sometimes also ferruginous), wavy, adaxial slightly or highly glossy, moderately densely tomentose or short-silky to glabrescent, (hairs white, sometimes also ferruginous);

proximal blade margins entire or serrulate;

juvenile blade color sometimes obscured by hairs, silky, tomentose or very densely woolly-tomentose abaxially, hairs white, sometimes ferruginous.

adaxial nectary narrowly oblong to oblong, 0.4–1.8 mm;

filaments distinct;

anthers yellow or purple turning yellow, ellipsoid or shortly cylindrical, 0.4–0.6 mm.

adaxial nectary narrowly oblong, oblong, or ovate, 0.5–1.2 mm;

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

anthers purple turning yellow, ellipsoid or shortly cylindrical, 0.4–0.7 mm.

adaxial nectary narrowly oblong to oblong, 0.6–1.3 mm;

stipe 0.2–0.6 mm;

ovary pyriform, (hairs refractive), beak gradually tapering to styles;

ovules 16–21 per ovary;

styles 0.6–1.8 mm;

stigmas 0.28–0.47–0.64 mm.

adaxial nectary oblong to flask-shaped, 0.2–1.1 mm;

stipe 1–1.7 mm;

ovary pyriform, beak slightly bulged below styles;

ovules 10–18 per ovary;

styles (sometimes slightly distinct distally), 0.1–0.6 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, or 2 plump lobes, 0.1–0.3 mm.

4.5–6 mm.

2.5–5.5 mm.

flowering before leaves emerge; staminate stout or subglobose, 20–57 × 13–18 mm, flowering branchlet 0–2 mm; pistillate densely flowered, slender to stout, 28–92(–105 in fruit) × 12–19 mm, flowering branchlet 0–5 mm;

floral bract brown or black, 2.8–5.2 mm, apex acute to convex, abaxially hairy, hairs straight.

flowering before or just before leaves emerge; staminate slender or stout, 18–88 × 5–15 mm, flowering branchlet 0–5 mm; pistillate densely flowered, slender or stout, 18–72 × 7–12 mm, flowering branchlet 0–6 mm;

floral bract 1–2.4 mm, apex broadly rounded, abaxially hairy, hairs straight or wavy.

= 76.