Flora of North America species comparison

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 foliaceous or rudimentary on early ones, foliaceous on late ones, apex acute or acuminate;

petiole shallowly grooved, or convex to flat adaxially, 5.5–14 mm, pilose, villous, or velvety to glabrescent adaxially;

largest medial blade (sometimes amphistomatous), narrowly oblong to oblong, narrowly elliptic to elliptic, lanceolate, oblanceolate, or obovate, 35–95 × 11–33 mm, 2–3.9 times as long as wide, base convex, rounded, or subcordate, margins slightly revolute or flat, serrulate, serrate, or sinuate, apex acute to acuminate, abaxial surface glaucous, glabrous, adaxial dull, glabrous or pilose, midrib pilose to villous;

proximal blade margins entire or serrulate;

juvenile blade sometimes reddish, villous or long-silky abaxially, hairs white, sometimes also 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 narrowly oblong, 0.6–1.1 mm;

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

anthers purple turning yellow, 0.4–0.8 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 narrowly oblong, oblong, or flask-shaped, 0.4–1 mm, shorter than or equal to stipe;

stipe 0.5–1.6 mm;

ovary pyriform, glabrous, beak gradually tapering to styles;

ovules 11–15 per ovary;

styles 0.6–1.1 mm;

stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, 0.24–0.36–0.56 mm.

5–5.6 mm.

4–7 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.

staminate flowering before or just before leaves emerge, pistillate as leaves emerge; staminate stout, 14–39 × 9–17 mm, flowering branchlet 0.5–7 mm; pistillate densely flowered, stout, 21–60 × 8–16 mm, flowering branchlet 0.5–8 mm;

floral bract brown, black, or bicolor, 1–2 mm, apex rounded to acute, abaxially hairy, hairs wavy, straight, or curly.

= 76.

= 114.