Flora of North America species comparison

stipules foliaceous, apex rounded, convex, acute or acuminate;

petiole convex to flat, or shallowly grooved adaxially, 3–18 mm, glabrous, pilose, or velvety to glabrescent adaxially;

largest medial blade lorate, narrowly oblong, or narrowly elliptic, 60–133 × 12–30 mm, 2.9–6.4 times as long as wide, base rounded, convex, or subcordate, margins flat, usually serrulate or serrate, rarely (apparently) entire, apex acuminate to acute, abaxial surface glaucous, glabrous, sparsely short-silky or pubescent, hairs straight or wavy, adaxial dull, glabrous, sparsely short-silky, or midrib pubescent;

proximal blade margins entire, serrulate, or crenulate;

juvenile blade reddish or yellowish green, glabrous or sparsely to moderately densely pilose or puberulent abaxially, hairs white.

stipules (sometimes marcescent) foliaceous, apex acute;

petiole convex to flat adaxially, 3–15 mm, tomentose, or velvety to glabrescent adaxially;

largest medial blade narrowly to broadly elliptic, oblanceolate, obovate, broadly obovate, 29–105 × 14–52 mm, 1.8–4.3 times as long as wide, base cuneate or convex, margins slightly revolute, entire, crenate, or sinuate, (glands submarginal or epilaminal), apex acute, convex, or acuminate, abaxial surface glaucous, tomentose or coarsely villous to glabrescent, hairs (white, sometimes also ferruginous), erect, spreading, or appressed, wavy or curved, adaxial dull or slightly glossy, pubescent or pilose, (hairs white, sometimes also ferruginous);

proximal blade margins entire;

juvenile blade yellowish green or reddish, glabrous, tomentose, or long-silky abaxially, hairs white, sometimes also ferruginous.

adaxial nectary narrowly oblong, oblong, flask-shaped, or triangular, 0.3–0.8 mm;

filaments distinct or connate less than 1/2 their lengths (or appearing as a single stamen), glabrous or hairy basally;

anthers purple or red turning yellow, (ellipsoid or globose), 0.5–0.8 mm.

adaxial nectary narrowly oblong, oblong, or ovate, 0.4–0.9 mm;

filaments distinct, glabrous or hairy on proximal 1/2 or basally;

anthers yellow, shortly cylindrical or ovoid, 0.6–1 mm.

adaxial nectary oblong, narrowly oblong, or flask-shaped, 0.3–0.9 mm, shorter than stipe;

stipe 0.9–2.5 mm;

ovary pyriform, glabrous, beak sometimes slightly bulged below styles;

ovules 12–21 per ovary;

styles 0.2–0.6 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.16–0.25–0.4 mm.

adaxial nectary oblong, square, or obovate, 0.4–0.9 mm, shorter than stipe;

stipe 1.2–2.7 mm;

ovary pyriform or obclavate, tomentose or short-silky, beak slightly bulged below styles;

ovules 12 per ovary;

styles 0.2–0.5 mm;

stigmas broadly cylindrical, 0.23–0.43–0.63 mm.

4–6 mm.

5–7 mm.

flowering as or just before leaves emerge; staminate stout, 20.5–34 × 8–11 mm, flowering branchlet 0–3 mm; pistillate moderately densely flowered, slender to subglobose, 15.5–49 × 8–18 mm, flowering branchlet 1–6 mm;

floral bract brown or bicolor, 0.8–1.6 mm, apex acute or rounded, abaxially hairy throughout or proximally (hairs usually arising from rachis), hairs wavy or curly.

flowering before leaves emerge; staminate stout, 11–16 mm, flowering branchlet 0–5 mm; pistillate densely to loosely flowered, stout, 11–18 mm, flowering branchlet 0–3 mm;

floral bract brown, black, or bicolor, 1–3 mm, apex acute, convex, or rounded, abaxially hairy, hairs straight or wavy.

= 38.

= 76.