Salix alba L.
  • Sp. Pl.
  • White willow

Cite taxon page as 'WFO (2020): Salix alba L. Published on the Internet; Accessed on: 29 May 2020'

General Information

Trees to 20(-25) m tall; trunk to 1 m d.b.h.; bark dull gray, fissured; crown spreading. Branchlets brownish, glabrous, tomentose when young. Buds coadnate, ca. 6 × 1.5 mm, apex acute. Stipules caducous; petiole 2-10 mm, sericeous; leaf blade lanceolate, oblanceolate, or obovate-lanceolate, 5-12 (-1.5) × 1-2(-3.5) cm, abaxially tomentose or subglabrous, adaxially often glabrous, both surfaces sericeous when young, base cuneate, margin serrulate, apex acuminate or long acuminate; lateral veins 12-15 on each side of midvein. Flowering coetaneous. Male catkin 3-5 cm; peduncle 5-8 mm; bracts yellowish, ovate-lanceolate or obovate-oblong, ciliate, abaxially glabrous, adaxially subglabrous or pilose at base, margin entire. Male flower: glands adaxial and abaxial; stamens 2, free; filaments pilose at base; anthers yellow. Female catkin 3-4.5 cm, to 5.5 cm in fruit; bracts yellowish, lanceolate or ovate-lanceolate, ciliate, caducous, abaxially cottony at base, adaxially sericeous. Female flower: glands adaxial and abaxial, adaxial gland rarely small; ovary ovoid-conical, 4.5-5 mm, glabrous, shortly stipitate or subsessile; style short, 2-lobed; stigma 2-parted. Fl. Apr-May, fr. May. 2n = 76.

  • Provided by: [B].Flora Of CHina @
    • Source: [
    • 1
    • ]. 

    Trees, 10-25 m. Stems: branches flexible or ± brittle at base, yellow, gray-brown, or red-brown, glabrous or hairy; branchlets yellowish or gray to red-brown, pilose, densely villous, or long-silky. Leaves: stipules rudimentary or absent on early ones, rudimentary or foliaceous on late ones, apex acute; petiole shallowly grooved adaxially, 3-13 mm, with pairs or clusters of spherical glands or lobes distally, long-silky abaxially; largest medial blade amphistomatous, narrowly oblong, very narrowly elliptic, narrowly elliptic, or lanceolate, 63-115 × 10-20 mm, 4.2-7.3 times as long as wide, base cuneate or convex, margins flat, serrate or serrulate, apex acuminate, caudate, or acute, abaxial surface very densely long-silky to glabrescent, hairs straight, (glaucous or obscured by hairs), adaxial dull, sparsely long-silky; proximal blade margins entire; juvenile blade yellowish green or reddish, very densely long-silky abaxially. Catkins: staminate 27-60 × 6-10 mm, flowering branchlet 2-8 mm; pistillate loosely flowered, slender, 31-51 × 4-8 mm, flowering branchlet 3-14 mm; floral bract 1.6-2.8 mm, apex rounded, entire, abaxially sparsely hairy, hairs straight. Staminate flowers: adaxial nectary oblong to square, 0.3-0.7 mm, nectaries usually distinct (rarely connate); filaments distinct, hairy on proximal 1/2 or basally; anthers (purple, turning yellow), shortly cylindrical to globose, 0.5-0.7 mm. Pistillate flowers: adaxial nectary square, 0.3-0.7 mm, equal to or shorter than stipe; stipe 0.2-0.8 mm; ovary obclavate to pyriform, beak slightly bulged below styles; ovules 8 or 9 per ovary; styles connate, 0.2-0.4 mm; stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, 0.3-0.6 mm. Capsules 3.5-5 mm. 2n = 76.

  • Provided by: [C].Flora of North America @
    • Source: [
    • 2
    • ]. 

    "Tree to 25 m; twigs spreading or sometimes pendulous, greenish to yellowish, long-sericeous, somewhat brittle at base; stipules minute and caducous; lvs narrowly lanceolate to lanceolate, 4–10(–15) × 1–2.5 cm, acuminate, with 7–10 glandular teeth per cm of margin, glaucous beneath, ± silvery-silky on both sides but especially beneath; petioles sericeous, 3–6 mm, those on vigorous young shoots glandular at the tip; catkins with the lvs, 3–6 cm, on peduncles 1–4 cm with 2–4 small lvs; scales as in no. 8 [Salix fragilis L.]; stamens mostly 2; fr ovoid-conic, 3–5 mm, glabrous, sessile or subsessile; style 0.2–0.4 mm; 2n=76. Native of Europe, sparingly escaped from cult. in our range. (S. a. var. vitellina, golden w., a long-established cultivar with bright yellow twigs) Hybridizes freely with nos. 8 and 9 [Salix babylonica L.]"

  • Provided by: [A].New York Botanical Garden
    • Source: [
    • 3
    • ]. 

    Other Local Names

    White willow

     Information From

    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • A Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
    Flora Of CHina @
    'Flora of China @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Missouri Botanical Garden
    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Flora of North America Association
    Global Tree Assessment
    BGCI. 2018. GlobalTreeSearch online database. Botanic Gardens Conservation International. Richmond, U.K. Available at Accessed on 30/11/2018.
    • D Botanic Gardens Conservation International
    • E CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    World Flora Online Data. 2018.
    • F CC0 1.0 Universal (CC0 1.0).