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.

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 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.

5–10 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.

×jesupii Fernald: S. alba × S. lucida;

S. ×ehrhartiana of authors, not G.

.

origin of this hybrid, between a European and a native species, is unknown.

is characterized by: shrubs or trees, 7–10 m;

branchlets red-brown;

petioles convex to shallowly grooved adaxially, 3–11 mm, with pairs or clusters of spherical or stalked glands distally;

largest medial leaf blade amphistomatous or hemiamphistomatous, abaxial surface glaucous, sparsely long-silky to glabrescent, hairs white and ferruginous;

floral bract apex acute to rounded, toothed or entire; pistillate flowering branchlet 8–16 mm, bract deciduous after flowering;

stamens 3–5;

stipes 0.3–0.6 mm;

ovary pyriform, glabrous;

ovules 12–14 per ovary;

styles 0.3–0.8 mm;

capsules 4–5 mm.