Salix lutea


N. Amer. Sylv. 1: 63, plate 19. 1842.

Common names: Yellow willow
Synonyms: Salix cordata var. watsonii Bebb Salix eriocephala var. watsonii (Bebb) Dorn Salix lutea var. watsonii (Bebb) Jepson Salix rigida var. watsonii (Bebb) Cronquist
Treatment appears in FNA Volume 7. Treatment on page 123. Mentioned on page 102, 103, 104, 112, 113.

Shrubs, 3–7 m, (sometimes forming clones by stem fragmentation). Stems: branches (sometimes ± brittle at base) yellow-gray, yellow-brown, or gray-brown, (sometimes weakly glaucous, with sparkling wax crystals), glabrous; branchlets red-brown or brownish, glabrous or pilose, (inner membranaceous bud-scale layer free, separating from outer layer). Leaves: stipules rudimentary or foliaceous on early ones, foliaceous on late ones, apex acute or rounded; petiole convex to flat, or shallowly grooved adaxially, 4–19 mm, pilose, velvety, or pubescent to glabrescent adaxially; largest medial blade (sometimes amphistomatous), lorate, narrowly elliptic, elliptic, lanceolate, or narrowly oblanceolate, 42–90 × 8–32 mm, 2.8–3.9–5.6 times as long as wide, base rounded, convex, or subcordate, margins flat, entire, serrulate, crenulate, or sinuate, apex acuminate to acute, abaxial surface glaucous, glabrous, pilose, or sparsely long-silky, hairs straight, adaxial dull or slightly glossy, glabrous, pilose, sparsely long-silky, especially midrib; proximal blade margins entire, serrulate, or crenulate; juvenile blade reddish or yellowish green, glabrous or sparsely to moderately densely long-silky throughout, hairs white. Catkins flowering as leaves emerge; staminate stout, slender, or subglobose, 10–45 × 6–12 mm, flowering branchlet 0.5–2 mm; pistillate loosely to densely flowered, stout or subglobose, 13.5–38 × 7–15 mm, flowering branchlet 0.5–7 mm; floral bract brown, tawny, or bicolor, 0.6–1.2 mm, apex acute or rounded, abaxially glabrous or sparsely hairy, hairs curly. Staminate flowers: adaxial nectary narrowly oblong, oblong, square, or flask-shaped, 0.4–0.9 mm; filaments distinct or connate less than 1/2 their lengths, glabrous; anthers yellow or purple turning yellow, (ellipsoid or globose), 0.4–0.8 mm. Pistillate flowers: adaxial nectary oblong, square, or ovate, 0.3–0.9 mm, shorter than stipe; stipe 0.9–3.8 mm; ovary pyriform or ovoid, glabrous, beak gradually tapering to styles; ovules 12–24 per ovary; styles 0.1–0.6 mm; stigmas flat, abaxially non-papillate with rounded tip, or 2 plump lobes, 0.14–0.2–0.3 mm. Capsules 3–5 mm. 2n = 38.

Phenology: Flowering Mar–May.
Habitat: Banks of streams, meadows, hillsides, gullies, sandy-clay, sandy or rocky substrates
Elevation: 600-3100 m


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Ariz., Calif., Colo., Idaho, Mont., Nev., Oreg., Utah, Wyo.


The possible occurrence of Salix lutea in Ginkgo Petrified Forest Park, Washington, needs to be investigated.


Salix lutea forms natural hybrids with S. arizonica.

Selected References


Lower Taxa

... more about "Salix lutea"
George W. Argus +
Nuttall +
Salix sect. Vetrix +
Yellow willow +
Ariz. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, Oreg. +, Utah +  and Wyo. +
600-3100 m +
Banks of streams, meadows, hillsides, gullies, sandy-clay, sandy or rocky substrates +
Flowering Mar–May. +
N. Amer. Sylv. +
Illustrated +  and Endemic +
Salix cordata var. watsonii +, Salix eriocephala var. watsonii +, Salix lutea var. watsonii +  and Salix rigida var. watsonii +
Salix lutea +
Salix sect. Cordatae +
species +