Flora of North America species comparison

stipules (early deciduous), foliaceous or rudimentary on early ones, foliaceous on late ones, apex acute, convex, or rounded;

petiole convex to flat, or shallowly grooved adaxially, 7–20 mm, glabrous or sparsely velvety adaxially;

largest medial blade narrowly oblong, oblong, elliptic, or broadly elliptic, 30–103 × 19–40 mm, 1.5–3.4 times as long as wide, base cordate, subcordate, rounded or convex, margins flat or slightly revolute, serrulate, irregularly serrate, crenate, or sinuate, apex acute or acuminate, abaxial surface glaucous, glabrous, adaxial slightly or highly glossy, glabrous;

proximal blade margins serrulate or entire;

juvenile blade translucent, glabrous or pilose 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 square or ovate, 0.3–0.5 mm;

filaments distinct, glabrous or sparsely hairy basally;

anthers yellow, (ellipsoid or shortly cylindrical), 0.5–0.8 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 narrowly ovate or square, 0.3–0.7 mm, shorter than stipe;

stipe 1.8–3.5 mm;

ovary obclavate, glabrous, beak slightly bulged below styles;

ovules 10–19 per ovary;

styles 0.4–0.5 mm;

stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.2–0.23–0.32 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.

7–8 mm.

4–7 mm.

staminate flowering just before leaves emerge, pistillate flowering as leaves emerge; staminate stout or slender, 18.5–63 × 7–15 mm, flowering branchlet 1–5 mm; pistillate loosely flowered, stout or slender, 25–85 × 8–20 mm, flowering branchlet 2–22 mm;

floral bract tawny, 1–2.4 mm, apex acute or convex, abaxially sparsely to moderately densely hairy, hairs straight or wavy.

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.

= 38.

= 114.