Flora of North America species comparison

branches yellow-brown or red-brown, not glaucous, glabrous;

branchlets yellow-brown or red-brown, densely pubescent or tomentose.

stipules absent or rudimentary on early ones;

petiole shallowly grooved adaxially, 2–5 mm, tomentose or velvety adaxially;

largest medial blade linear, narrowly oblong, narrowly oblanceolate, or narrowly elliptic, 5–160 × 3–10(–20) mm, base cuneate, margins strongly or slightly revolute, entire or serrulate, (glands submarginal or epilaminal), apex acuminate or acute, abaxial surface glaucous, densely tomentose or woolly, (midribs yellowish, prominent), hairs appressed, curved, adaxial dull or slightly glossy, sparsely pubescent to glabrescent;

proximal blade margins entire;

juvenile blade yellowish green, densely tomentose abaxially, hairs white or gray.

adaxial nectary oblong or square, 0.3–0.9 mm;

filaments connate less or more than 1/2 their lengths;

anthers yellow, 0.5–0.7 mm.

adaxial nectary oblong or square, 0.3–0.7 mm;

ovary obclavate, beak gradually tapering to styles;

ovules 2 per ovary;

styles 0.7–0.9 mm.

3–5 mm.

humboldtiana Willdenow: Humboldt willow is not known to occur in the flora area.

is characterized by: trees, 4–25 m;

branches highly brittle at base, bud-scale margins distinct and overlapping adaxially;

stipules on late leaves rudimentary or foliaceous;

largest medial leaf blade usually linear, abaxial surface not glaucous, adaxial dull; pistillate bract deciduous after flowering;

stamens 3–7;

capsules with distinct, often raised, white veins.;

it occurs throughout much of Mexico to central Chile.

flowering just before or as leaves emerge; staminate stout or slender, 26–34 × 6–10 mm, flowering branchlet 1–1.5 mm; pistillate moderately to very densely flowered, slender or stout, 19–40 × 3–10 mm, flowering branchlet 0.3–3.5 mm;

floral bract light brown or tawny, 1.5–4 mm, apex rounded, truncate, or acute, entire or toothed, abaxially hairy, hairs straight.

= 38.