Flora of North America species comparison

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

petiole convex to flat, or shallowly grooved adaxially, 4–9 mm, pilose adaxially;

largest medial blade (sometimes amphistomatous), lorate, narrowly oblong, narrowly elliptic, or oblanceolate, 35–95 × 7.5–20 mm, 3.4–7.1 times as long as wide, base cuneate or convex, margins flat or slightly revolute, entire, apex acute, acuminate, or convex, abaxial surface glaucous (sometimes obscured by hairs), sparsely to moderately densely long- to short-silky or pubescent, hairs (white, sometimes also ferruginous), straight or wavy, adaxial dull or slightly glossy, sparsely or moderately densely pubescent or long- to short-silky, (hairs white, sometimes also ferruginous);

proximal blade margins entire or serrulate;

juvenile blade densely long-silky abaxially, hairs white, sometimes also ferruginous.

stipules foliaceous, (prominent, 5–9–15 mm), apex rounded to acute, sometimes acuminate;

petiole (usually reddish), shallowly grooved, or convex to flat adaxially, 6–20 mm, short-silky or velvety adaxially;

largest medial blade broadly to narrowly elliptic, or ovate to broadly obovate, (25–)30–86(–118) × 12–51 mm, 1.4–3 times as long as wide, base convex, rounded, cuneate, subcordate, cordate, or sometimes irregularly lobed, margins flat, serrulate or crenate, apex acute, acuminate, or convex, abaxial surface glaucous, glabrous, pubescent, or pilose, hairs wavy, adaxial slightly glossy or dull, glabrous, puberulent, pubescent, or pilose, midrib hairy;

proximal blade margins entire or serrulate;

juvenile blade reddish, glabrous or pubescent abaxially, hairs white, sometimes also ferruginous.

adaxial nectary oblong or ovate, 0.6–1.1 mm;

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

anthers purple turning yellow, 0.6–1 mm.

adaxial nectary oblong, 0.3–1 mm;

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

anthers purple turning yellow, 0.4–0.5 mm.

adaxial nectary oblong or flask-shaped, 0.7–1.3 mm, shorter than or equal to stipe;

stipe 0.8–2 mm;

ovary obclavate or pyriform, short-silky-villous, beak gradually tapering to or slightly bulged below styles;

ovules 15–16 per ovary;

styles 0.6–1 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, or broadly cylindrical, 0.24–0.32–0.44 mm.

adaxial nectary oblong, flask-shaped, 0.3–0.8 mm, shorter than stipe;

stipe 0.5–0.8–3 mm;

ovary pyriform or obclavate, glabrous, beak gradually tapering to styles;

ovules 18 per ovary;

styles (0.5–)0.7–1.8 mm;

stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.1–0.21–0.29 mm.

5–10 mm.

4–7 mm.

flowering as leaves emerge; staminate stout, 15.5–34 × 7–14 mm, flowering branchlet 1–8 mm; pistillate moderately densely flowered, stout, 20–55(–65 in fruit) × 11–13 mm, flowering branchlet 2–15 mm;

floral bract dark brown or bicolor, 1.2–2.5 mm, apex acute or rounded, abaxially hairy, hairs straight or wavy.

flowering before leaves emerge; staminate stout, 16–39 × 10–12 mm, flowering branchlet 0 mm; pistillate densely or moderately densely flowered, slender to globose, 17–73 × 8–20 mm, flowering branchlet 0–5 mm;

floral bract brown or black, 1–2.4 mm, apex rounded or acute, abaxially hairy, hairs straight.

= 38.