Flora of North America species comparison

branches dark red-brown or gray-brown, not glaucous, glabrous or hairy, (peeled wood smooth or striate with relatively few, short striae);

branchlets red-brown, moderately to very densely pubescent or velvety.

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

petiole convex to flat adaxially, 4–15 mm, tomentose adaxially;

largest medial blade elliptic, broadly elliptic, oblanceolate, or obovate, 65–105 × 22–52 mm, 2–3 times as long as wide, base convex or cuneate, margins slightly revolute, entire, crenate, or sinuate, (glands submarginal), apex acuminate or convex, abaxial surface glaucous, tomentose, hairs erect or spreading, curly, adaxial dull or slightly glossy, pubescent or tomentose;

proximal blade margins entire;

juvenile blade yellowish green, sparsely to densely tomentose abaxially, hairs white.

stipules usually foliaceous, sometimes minute rudiments on early ones, foliaceous on late ones, (ca. 4 mm), apex acute;

petiole convex to flat, or shallowly grooved adaxially, 3.5–12(–15) mm, villous to puberulent adaxially;

largest medial blade (sometimes hemiamphistomatous), broadly obovate, elliptic, broadly elliptic, or subcircular, 24–52(–100) × 12–45 mm, base concave, rounded, subcordate, cordate, or cuneate, margins sometimes slightly revolute, serrulate, or crenulate to subentire, apex abruptly acuminate or acute, abaxial surface glaucous (tip often not glaucous), sparsely to moderately densely puberulent, or silky to glabrescent, hairs appressed or spreading, straight or wavy, adaxial slightly glossy, glabrescent or sparsely to moderately densely puberulent, pubescent, or short-silky (especially midrib);

proximal blade margins serrulate, crenulate, or entire;

juvenile blade sometimes reddish, long-silky, villous, tomentose (at least on midrib), or glabrous abaxially, hairs usually white, rarely somewhat ferruginous.

adaxial nectary oblong or ovate, 0.5–1 mm;

filaments distinct, glabrous or hairy basally;

anthers yellow or purple turning yellow, ellipsoid or shortly cylindrical, 0.7–1 mm.

adaxial nectary 0.5–0.7 mm;

filaments distinct;

anthers purple turning yellow, (ellipsoid or shortly cylindrical), 0.5–0.8 mm.

adaxial nectary oblong or square, 0.4–1 mm, shorter than stipe;

stipe 1.2–2.7 mm;

ovary pyriform, long-silky, beak slightly bulged below styles;

ovules 12 per ovary;

styles 0.2–0.5 mm;

stigmas slenderly or broadly cylindrical, 0.3–0.6 mm.

adaxial nectary ovate, square, or flask-shaped, 0.4–0.6(–1) mm;

ovary pyriform, pubescent throughout or in patches or streaks, or glabrous (hairs refractive), beak gradually tapering to styles;

ovules 12–14 per ovary;

styles 0.6–1.5 mm.

5–5.6 mm.

6–10 mm.

flowering before leaves emerge; staminate stout or subglobose, 26–39 × 12–26 mm, flowering branchlet 0–5 mm; pistillate densely flowered, stout or subglobose, 27–54(–75 in fruit) × 4–15 mm, flowering branchlet 1–5(–10) mm;

floral bract dark brown, black, or bicolor, 2–3 mm, apex acute or convex, abaxially hairy, hairs straight.

flowering as leaves emerge; staminate (densely flowered), stout or subglobose, 17–35 mm, flowering branchlet 1–3 mm; pistillate densely flowered, stout, 9–11(–30)(–80 in fruit) mm, flowering branchlet 2–5.5 mm;

floral bract pale brown, 1–1.9(–2.8) mm, apex acute, convex, or rounded, abaxially sparsely hairy, hairs straight or wavy.

= 76.

= 114.