Linnaeus, Sp. Pl. 2: 1021. 1753.
Osier, basket willow, silky osier
branches yellow-brown, gray-brown, or yellowish, not glaucous, glabrous or puberulent; branchlets yellow-brown or yellowish (sometimes color obscured by hairs), glabrous, densely to sparsely villous, velvety, or puberulent.
stipules (not adnate to petioles), rudimentary or absent on early ones, (late ones sometimes brownish, linear, 5.4-10.4 mm), apex acuminate; petiole shallowly grooved adaxially, 4-13 mm, villous, puberulent, or velvety adaxially; largest medial blade linear, lorate, narrowly oblong, or narrowly elliptic, 53-130 × 5-33 mm, base cuneate, margins strongly revolute, sinuate or apparently entire, (glands epilaminal), apex acuminate, acute, or convex, abaxial surface apparently glaucous (obscured by hairs), densely short-silky, woolly, or tomentose, (midribs prominent, yellowish, and hairy), hairs appressed, spreading or erect, straight or wavy, adaxial dull or slightly glossy, sparsely or moderately densely pubescent, hairs gray; proximal blade margins entire; juvenile blade yellowish green, very densely tomentose or short-silky abaxially, hairs white.
flowering just before or as leaves emerge; staminate stout, 24-48 mm, flowering branchlet 0-2 mm; pistillate densely flowered, 23-55 mm, flowering branchlet 0-6 mm; floral bract brown or tawny, 1.6-2.2 mm, apex convex or rounded, abaxially hairy, hairs straight.
adaxial nectary narrowly oblong or oblong, 0.6-1.5 mm; filaments distinct; anthers purple turning yellow, ellipsoid to shortly cylindrical, 0.6-0.8 mm.
adaxial nectary narrowly oblong or oblong, 0.9-1.4 mm; ovary pyriform, beak gradually tapering to styles; ovules 12-18 per ovary; styles 0.6-1.8 mm.
Flowering Apr-early May. Sandy, open woods, cobble rivershores, lake margins, and roadsides; 0-300 m; introduced; N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que.; Conn., Ind., Iowa, Maine, Mass., N.J., N.Y., Ohio, R.I., Vt.; Europe.
) is distinguished from
by having leaf blades usually broad, 2.8-4.9(-6.4) times as long as wide, stipes 0.9-2 mm, ovaries short-silky, branches ± brittle at base, and petioles flat to convex adaxially;
has leaf blades usually very narrow, 4.7-13.7 times as long as wide, stipes 0.1-0.5 mm, ovaries long-silky, branches flexible at base, and petioles shallowly grooved adaxially.
[p. 132] and 86.
for further comparative descriptions.