Flora of North America species comparison

erect, decumbent, or trailing;

branches red-brown, glabrous;

branchlets yellow-brown or red-brown, glabrous.

stipules absent or rudimentary on early ones, foliaceous on late ones;

petiole 1.5–4.9–14 mm;

largest medial blade amphistomatous or hemiamphistomatous, elliptic, subcircular, or circular, 8–25 × 4–22 mm, 0.8–2.3 times as long as wide, base convex or rounded, margins slightly revolute, entire, sometimes ciliate, apex rounded or convex, abaxial surface glabrous, adaxial slightly glossy, glabrous;

proximal blade margins entire;

juvenile blade (reddish), glabrous, often ciliate.

abaxial nectary 0.6–1 mm, adaxial nectary narrowly oblong to ovate, 0.6–1.3 mm, nectaries distinct;

filaments distinct;

anthers ellipsoid to globose, 0.4–0.6 mm.

abaxial nectary absent, adaxial nectary narrowly oblong, ovate, or irregularly square, 0.6–1.4 mm, longer than stipe;

stipe 0.2–1 mm;

ovary obnapiform, not glaucous, usually glabrous, sometimes pubescent or short-silky, with hairs in patches or streaks, beak abruptly tapering to styles;

ovules 9–18 per ovary;

styles connate or distinct 1/2 their lengths, 0.5–1.4 mm;

stigmas flat, abaxially non-papillate with rounded tip, or slenderly cylindrical, 0.24–0.32–0.4 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.

staminate 5.5–14 × 5–10 mm, flowering branchlet 1–6 mm; pistillate moderately densely flowered, globose, subglobose, or stout, 8–29 × 6–14 mm, flowering branchlet 1.5–20 mm;

floral bract brown, 1–1.8 mm, apex rounded, abaxially sparsely hairy or ciliate, hairs straight or wavy.