Flora of North America species comparison

trailing or erect;

branches red-brown, (sometimes weakly glaucous), glabrous;

branchlets yellow-brown or greenish brown, glabrous.

stipules (sometimes marcescent) absent or rudimentary on early ones, rudimentary or foliaceous on late ones;

petiole (deeply to shallowly grooved adaxially), 3–9–20 mm, (ciliate, glabrous adaxially);

largest medial blade amphistomatous or hemiamphistomatous, (sometimes with 2 pairs of secondary veins arising at or close to base, arcing toward apex), elliptic, broadly elliptic, or subcircular, 16–42 × 12–30(–38) mm, 1–2 times as long as wide, base convex, cuneate, or rounded, margins flat or slightly revolute, entire or serrulate, ciliate (hairs wavy), apex convex, acuminate, rounded, or retuse, abaxial surface glabrous, adaxial highly glossy, glabrous;

proximal blade margins entire or irregularly serrulate;

juvenile blade pilose to glabrescent abaxially.

abaxial nectary (0–)0.2–0.7 mm, adaxial nectary oblong, narrowly oblong, or ovate, 0.6–1.3 mm, nectaries distinct;

filaments distinct (glabrous);

anthers ellipsoid, 0.5–0.6 mm.

abaxial nectary absent, adaxial nectary oblong, 0.5–1.4 mm, longer than stipe;

stipe 0.2–0.8 mm;

ovary pyriform, sometimes glaucous, glabrous, beak gradually tapering to styles;

ovules 12–13 per ovary;

styles connate to distinct 1/2 their lengths, (0.6–)0.8–2 mm;

stigmas flat, abaxially non-papillate with rounded or pointed tip, or slenderly cylindrical, 0.32–0.5–0.88 mm.

4–10 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 13–31 × 7–11 mm, flowering branchlet 1–15 mm;

pistillate moderately densely to loosely flowered, stout to globose, 15–54(–90 in fruit) × 6–15 mm, flowering branchlet 2–42 mm;

floral bract brown, 1.6–2 mm, apex rounded, entire, abaxially sparsely hairy throughout or distally, hairs straight or wavy.