Flora of North America species comparison

trailing;

branches yellow-brown or red-brown, glabrous;

branchlets yellow-brown or red-brown, pubescent, pilose, or glabrescent.

stipules absent or rudimentary;

petiole 1.5–2 mm (glabrous or pubescent adaxially);

largest medial blade (2 pairs of secondary veins arising at or close to base, arcing toward apex) broadly elliptic, subcircular, broadly ovate, or elliptic, 9–22(–30) × 7.5–14(–19) mm, 1.2–2 times as long as wide, base rounded, subcordate, cordate, or convex, margins flat or slightly revolute, entire or serrulate, apex convex, rounded, or retuse, abaxial surface glabrous, adaxial highly glossy, glabrous;

proximal blade margins entire or serrulate;

juvenile blade pilose or puberulent abaxially.

abaxial nectary (0.3–)0.5–0.7 mm, adaxial nectary narrowly oblong or oblong, 0.7–1.1 mm, nectaries distinct, or connate and cup-shaped;

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

anthers ellipsoid, 0.4–0.5 mm.

abaxial nectary (0–)0.6–0.9 mm, adaxial nectary narrowly oblong or oblong, 0.6–1.4 mm, longer than stipe, nectaries connate and shallowly cup-shaped;

stipe 0–0.7 mm;

ovary pyriform, glabrous, beak slightly bulged below styles;

ovules 8–10 per ovary;

styles 0.2–1 mm;

stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, 0.2–0.27–0.32 mm.

3.5–7.5 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.

from lateral buds;

staminate (3–8 flowers), 3.2–6.6 × 2–5.2 mm, flowering branchlet 0.8–4.6 mm;

pistillate loosely flowered (3–5 flowers), shape indeterminate, 7.5–13 × 3–10 mm, flowering branchlet 0.5–10 mm;

floral bract tawny, 0.6–1.4 mm, apex rounded or truncate, entire, abaxially glabrous or sparsely hairy.

= 38.