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.

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 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.

4–6 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.

×smithiana Willdenow: S. caprea × S. viminalis is an introduced European hybrid commonly naturalized in eastern Canada (New Brunswick, Newfoundland, Nova Scotia, and Prince Edward Island), where it was introduced for coarse basketry.

pistillate specimens are known and seed-set has not been noted.

is characterized by: shrubs or trees, 2–10 m;

branches yellow-brown, brownish, or gray-brown, pubescent to glabrescent, ± brittle at base, peeled 3–5 year-old branches smooth or striate, striae few, 0–6 mm;

branchlets not glaucous, moderately densely pubescent;

largest medial leaf blades very narrowly elliptic, narrowly elliptic, or narrowly oblong, 2.8–4.9(–6.4) times as long as wide, margins entire or sinuate, adaxial surfaces pubescent;

catkins flowering before leaves emerge;

stipes 0.9–2 mm;

ovaries pyriform to obclavate, moderately to very densely short-silky;

styles 0.5–1.2 mm;

stigmas slenderly cylindrical, lobes 0.6–1.2 mm; and capsules 5–7 mm.

= 38.