Flora of North America species comparison

branches yellow-brown or yellow-gray, not or weakly glaucous, (with sparkling wax crystals, dull or slightly glossy), pilose or villous;

branchlets gray-brown or red-brown, pubescent, villous, or velvety.

stipules foliaceous, apex acute or convex;

petiole shallowly grooved adaxially, 4–13 mm, villous or pubescent adaxially;

largest medial blade (amphistomatous), narrowly oblong, narrowly elliptic, elliptic, oblanceolate, or lanceolate, 26–47 × 7.5–15 mm, 2.8–4.1 times as long as wide, base convex, rounded, or subcordate, margins slightly revolute or flat, serrate or serrulate, apex acuminate to acute, abaxial surface glaucous, glabrous, pilose, villous, or long-silky, hairs straight or wavy, adaxial dull, sparsely or moderately densely pilose or long-silky, especially on midrib;

proximal blade margins entire or serrulate;

juvenile blade reddish or yellowish green, sparsely to moderately densely long-silky or pubescent abaxially, hairs white.

adaxial nectary narrowly oblong or ovate, 0.7–1.1 mm;

filaments distinct or connate, hairy basally;

anthers yellow, 0.6–0.8 mm.

adaxial nectary oblong, flask-shaped, or narrowly ovate, 0.4–1 mm, shorter than stipe;

stipe 2–4 mm;

ovary pyriform, glabrous, beaks slightly bulged below styles;

ovules 14–18 per ovary;

styles 0.3–0.5 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, 0.16–0.23–0.28 mm.

2.5–5 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, 16–30 × 8–10 mm, flowering branchlet 1.5–4 mm;

pistillate loosely flowered, stout, 18–22 × 9–11 mm, flowering branchlet 3–4 mm;

floral bract brown or tawny, 1.2–1.6 mm, apex acute or rounded, abaxially hairy throughout or proximally, hairs straight or wavy.