Flora of North America species comparison

stipules foliaceous, apex acuminate to rounded;

petiole convex to flat adaxially, 6–12 mm, glabrous or pilose adaxially;

largest medial blade narrowly oblong, narrowly elliptic, lanceolate, or obovate, 50–150 × 10–53 mm, 2.4–4.5 times as long as wide, base cordate, subcordate, rounded, or convex, margins flat, serrate, serrulate, or spinulose-serrulate, apex acuminate to acute, abaxial surface glaucous, glabrous, adaxial dull, glabrous, pilose, or sparsely pubescent, (sometimes adaxial stomata only along veins or apically);

proximal blade margins entire;

juvenile blade reddish or yellowish green, glabrous, pilose or sparsely long-silky abaxially, hairs white.

adaxial nectary oblong to narrowly oblong, 0.8–1 mm;

filaments distinct or connate less than 1/2 their lengths, glabrous;

anthers purple turning yellow, (ellipsoid), 0.5–0.6 mm.

adaxial nectary oblong, square, or flask-shaped, 0.3–0.8 mm, shorter than stipe;

stipe 1.3–4.2 mm;

ovary pyriform, glabrous, beak sometimes slightly bulged below styles;

ovules 12–22 per ovary;

styles 0.3–0.7 mm;

stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, or slenderly cylindrical, 0.16–0.28–0.4 mm.

4–6 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 as leaves emerge; staminate slender or stout, 16–41 × 8–12 mm, flowering branchlet 0.5–3 mm; pistillate moderately densely to loosely flowered, slender or stout, 19–66 × 8–18 mm, flowering branchlet 0.5–6 mm;

floral bract brown, 0.8–1.6 mm, apex acute or rounded, abaxially hairy mainly proximally, hairs straight or wavy.