Flora of North America species comparison

stipules (sometimes marcescent) foliaceous, apex acute;

petiole convex to flat adaxially, 3–15 mm, tomentose, or velvety to glabrescent adaxially;

largest medial blade narrowly to broadly elliptic, oblanceolate, obovate, broadly obovate, 29–105 × 14–52 mm, 1.8–4.3 times as long as wide, base cuneate or convex, margins slightly revolute, entire, crenate, or sinuate, (glands submarginal or epilaminal), apex acute, convex, or acuminate, abaxial surface glaucous, tomentose or coarsely villous to glabrescent, hairs (white, sometimes also ferruginous), erect, spreading, or appressed, wavy or curved, adaxial dull or slightly glossy, pubescent or pilose, (hairs white, sometimes also ferruginous);

proximal blade margins entire;

juvenile blade yellowish green or reddish, glabrous, tomentose, or long-silky abaxially, hairs white, sometimes also ferruginous.

adaxial nectary narrowly oblong, oblong, or ovate, 0.4–0.9 mm;

filaments distinct, glabrous or hairy on proximal 1/2 or basally;

anthers yellow, shortly cylindrical or ovoid, 0.6–1 mm.

adaxial nectary oblong, square, or obovate, 0.4–0.9 mm, shorter than stipe;

stipe 1.2–2.7 mm;

ovary pyriform or obclavate, tomentose or short-silky, beak slightly bulged below styles;

ovules 12 per ovary;

styles 0.2–0.5 mm;

stigmas broadly cylindrical, 0.23–0.43–0.63 mm.

5–7 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 before leaves emerge;

staminate stout, 11–16 mm, flowering branchlet 0–5 mm;

pistillate densely to loosely flowered, stout, 11–18 mm, flowering branchlet 0–3 mm;

floral bract brown, black, or bicolor, 1–3 mm, apex acute, convex, or rounded, abaxially hairy, hairs straight or wavy.

= 76.