dcsimg

Associations

provided by BioImages, the virtual fieldguide, UK
Foodplant / open feeder
larva of Amauronematus histrio grazes on leaf of Salix alba
Other: major host/prey

In Great Britain and/or Ireland:
Foodplant / feeds on
Blepharidopterus diaphanus feeds on Salix alba
Other: major host/prey

Foodplant / parasite
immersed pycnidium of Camarosprium coelomycetous anamorph of Camarosporium salicinum parasitises twig of Salix alba
Remarks: season: 5-6

Foodplant / sap sucker
Cavariella aegopodii sucks sap of live Salix alba
Remarks: season: autumn-spring

Foodplant / mobile cased feeder
larva of Cryptocephalus decemmaculatus grazes in mobile case on fallen, old petiole of Salix alba
Remarks: captive: in captivity, culture, or experimentally induced

Plant / resting place / on
adult of Cryptocephalus primarius may be found on Salix alba
Remarks: season: 5-6

Foodplant / internal feeder
larva of Cryptorhynchus lapathi feeds within stem of Salix alba

Foodplant / saprobe
often astromatic, prominent, loculi in a circle pycnidium of Cytospora coelomycetous anamorph of Cytospora fugax is saprobic on bark of Salix alba

Foodplant / saprobe
loosely gregarious, erumpent stroma of Cytospora coelomycetous anamorph of Cytospora salicis is saprobic on dead, often attached twig of Salix alba
Remarks: season: 1-8

Foodplant / feeds on
scattered, black, subepidermal, covered pycnidium of Diplodina coelomycetous anamorph of Diplodina salicis feeds on twig of Salix alba
Remarks: season: 12-4

Foodplant / internal feeder
larva of Dorytomus hirtipennis feeds within male, female catkin of Salix alba

Foodplant / feeds on
Dorytomus salicis feeds on Salix alba

Foodplant / parasite
acervulus of Monostichella coelomycetous anamorph of Drepanopeziza salicis parasitises live leaf of Salix alba
Remarks: season: 8-9

Foodplant / open feeder
larva of Empria immersa grazes on leaf of Salix alba
Other: major host/prey

Plant / associate
Euphranta toxoneura is associated with Salix alba

Foodplant / gall
larva of Euura testaceipes causes gall of leaf (midrib) of Salix alba
Other: major host/prey

Foodplant / saprobe
erumpent stroma of Hypoxylon multiforme is saprobic on dead, corticate branch of Salix alba
Remarks: season: 10-4
Other: minor host/prey

Foodplant / saprobe
widely effused stroma of Hypoxylon rubiginosum agg. is saprobic on dead branch of Salix alba
Other: minor host/prey

Foodplant / parasite
amphigenous telium of Melampsora salicis-albae parasitises live twig of Salix alba

Foodplant / saprobe
effuse colony of Geniculosporium anamorph of Nemania effusa is saprobic on dead bark of Salix alba
Remarks: season: 4

Foodplant / saprobe
effuse colony of Geniculosporium dematiaceous anamorph of Nemania serpens is saprobic on dead branch of Salix alba
Other: minor host/prey

Foodplant / open feeder
larva of Nematus salicis grazes on leaf of Salix alba
Other: major host/prey

Foodplant / saprobe
rather densely gregarious, subepidermal, emergent pycnidium of Phomopsis coelomycetous anamorph of Phomopsis salicina is saprobic on dead branch of Salix alba
Remarks: season: 10-5

Foodplant / roller
larva of Phyllocolpa puella rolls leaf edge of Salix alba

Foodplant / gall
larva of Pontania proxima causes gall of live leaf of Salix alba

Fungus / parasite
Uncinula adunca var. adunca parasitises Salix alba

Foodplant / saprobe
immersed pseudothecium of Venturia chlorospora is saprobic on dead leaf of Salix alba
Remarks: season: 4-6

Foodplant / spot causer
Pollaccia dematiaceous anamorph of Venturia saliciperda causes spots on live shoot of Salix alba
Remarks: season: summer

Foodplant / open feeder
adult of Zeugophora flavicollis grazes on leaf of tree (at least 8m in height) of Salix alba
Remarks: season: 8-10,5-7

license
cc-by-nc-sa-3.0
copyright
BioImages
project
BioImages

Comments

provided by eFloras
Used for timber, weaving wicker baskets, and as a nectariferous plant.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 4: 184 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
project
eFloras.org
original
visit source
partner site
eFloras

Comments

provided by eFloras
A nectiferous plant; the wood is used as timber and for making cricket bats; young branches are used for weaving baskets. (F. Zhenfu, Z. Shidong & A.K. Skvortsov, l.c.).
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 203 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Description

provided by eFloras
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.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 4: 184 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
project
eFloras.org
original
visit source
partner site
eFloras

Description

provided by eFloras
Tree up to 35 m tall, bark dark grey, fissured. Young branches erect or drooping, silky, later becoming glabrous. Buds 6 x 1.5-2 mm, lanceolate-oblong, flattened, silky, acute. Leaves stipulate, stipules small, lanceolate, caducous. Petiole 5-8 mm, eglandular, lamina 5-10-(15) x 1-3 cm, narrowly lanceolate, acuminate, finely serrate, silky adpressed pilose when young, becoming subglabrescent. Catkins appearing with leaves, dense, cylindrical, often bisexual, rachis densely pubescent, stalked with entire, oblong-obovate, obtusish bracts. Male catkin 25-50 x 3-4 mm. before anthesis. Stamens 2, free, filaments hairy towards the base, anthers 0.5-0.6 (-7) mm, yellow. Female catkin 3-5 x c. 0.6 cm, lax, glands 1 or 2, ovary ovoid, conical, obtuse, glabrous, subsessile; fruiting stipe 0.2-0.8 mm, equalling gland.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 203 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

provided by eFloras
Gansu, Nei Mongol, Qinghai, Xinjiang, Xizang [WC Asia, Europe]
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 4: 184 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
project
eFloras.org
original
visit source
partner site
eFloras

Distribution

provided by eFloras
Distribution: Europe except the Arctic W. Siberia; Mediterranean region, S.W. and Central Asia. Often planted. Widely naturalized in Pakistan.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 203 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Flower/Fruit

provided by eFloras
Fl. Per.: April-May.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of Pakistan Vol. 203 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of Pakistan @ eFloras.org
editor
S. I. Ali & M. Qaiser
project
eFloras.org
original
visit source
partner site
eFloras

Habitat

provided by eFloras
Along rivers, also cultivated; below 3100 m.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of China Vol. 4: 184 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of China @ eFloras.org
editor
Wu Zhengyi, Peter H. Raven & Hong Deyuan
project
eFloras.org
original
visit source
partner site
eFloras

Salix alba

provided by wikipedia EN

Salix alba, the white willow, is a species of willow native to Europe and western and central Asia.[1][2] The name derives from the white tone to the undersides of the leaves.

It is a medium to large deciduous tree growing up to 10–30 m tall, with a trunk up to 1 m diameter and an irregular, often-leaning crown. The bark is grey-brown and is deeply fissured in older trees. The shoots in the typical species are grey-brown to green-brown. The leaves are paler than most other willows because they are covered with very fine, silky white hairs, in particular on the underside; they are 5–10 cm long and 0.5–1.5 cm wide. The flowers are produced in catkins in early spring and are pollinated by insects. It is dioecious, with male and female catkins on separate trees; the male catkins are 4–5 cm long, the female catkins 3–4 cm long at pollination, lengthening as the fruit matures. When mature in midsummer, the female catkins comprise numerous small (4 mm) capsules, each containing numerous minute seeds embedded in silky white hairs, which aids wind dispersal.[1][2][3]

Ecology

Tree showing whitish foliage compared to surrounding trees

Like all willows, Salix alba is usually to be found in wet or poorly-drained soil at the edge of pools, lakes or rivers. Its wide-spreading roots take up moisture from a large surrounding area.[4]

White willows are fast-growing but relatively short-lived, being susceptible to several diseases, including watermark disease caused by the bacterium Brenneria salicis (named because of the characteristic 'watermark' staining in the wood; syn. Erwinia salicis) and willow anthracnose, caused by the fungus Marssonina salicicola. These diseases can be a serious problem on trees grown for timber or ornament.

It readily forms natural hybrids with crack willow Salix fragilis, the hybrid being named Salix × rubens Schrank.[1]

Varieties, cultivars and hybrids

Several cultivars and hybrids have been selected for forestry and horticultural use:[1][2]

  • Salix alba 'Caerulea' (cricket-bat willow; syn. Salix alba var. caerulea (Sm.) Sm.; Salix caerulea Sm.) is grown as a specialist timber crop in Britain, mainly for the production of cricket bats, and for other uses where a tough, lightweight wood that does not splinter easily is required. It is distinguished mainly by its growth form, very fast-growing with a single straight stem, and also by its slightly larger leaves (10–11 cm long, 1.5–2 cm wide) with a more blue-green colour. Its origin is unknown; it may be a hybrid between white willow and crack willow, but this is not confirmed.[1]
  • Salix alba 'Vitellina' (golden willow; syn. Salix alba var. vitellina (L.) Stokes) is a cultivar grown in gardens for its shoots, which are golden-yellow for one to two years before turning brown. It is particularly decorative in winter; the best effect is achieved by coppicing it every two to three years to stimulate the production of longer young shoots with better colour. Other similar cultivars include 'Britzensis', 'Cardinal', and 'Chermesina', selected for even brighter orange-red shoots.
  • Salix alba 'Vitellina-Tristis' (golden weeping willow, synonym 'Tristis') is a weeping cultivar with yellow branches that become reddish-orange in winter. It is now rare in cultivation and has been largely replaced by Salix x sepulcralis 'Chrysocoma'. It is, however, still the best choice in very cold parts of the world, such as Canada, the northern US, and Russia.
  • The golden hybrid weeping willow (Salix × sepulcralis 'Chrysocoma') is a hybrid between white willow and Peking willow Salix babylonica.

Award of Garden Merit

The following have received the Royal Horticultural Society's Award of Garden Merit[5]

  • Salix alba 'Golden Ness'[6]
  • Salix alba var. serica (silver willow)[7]
  • Salix alba var. vitellina 'Yelverton'[8]
  • Salix × sepulcralis 'Erythroflexuosa'[9]
  • Salix × sepulcralis var. chrysocoma[10]

Uses

The wood is tough, strong, and light in weight, but has minimal resistance to decay. The stems (withies) from coppiced and pollarded plants are used for basket-making. Charcoal made from the wood was important for gunpowder manufacture. The bark tannin was used in the past for tanning leather.[1][2] The wood is used to make cricket bats.

S. alba wood has a low density and a lower transverse compressive strength. This allows the wood to bend, which is why it can be used to make baskets. Willow bark contains indole-3-butyric acid, which is a plant hormone stimulating root growth; willow trimmings are sometimes used to clone rootstock in place of commercially synthesized root stimulator.[11] It is used for ritual purposes by Jews on the holiday of Sukkot.[12]

Medicinal uses

Salix alba tincture

Willow (of unspecified species) has long been used by herbalists for various ailments, although it is a myth that they attribute to it any analgesic effect.[13] One of the first references to White Willow specifically was by Edward Stone, of Chipping Norton, Oxfordshire, England, in 1763. He 'accidentally' tasted the bark and found it had a bitter taste, which reminded him of Peruvian Bark (Cinchona), which was used to treat malaria. After researching all the 'dispensaries and books on botany,' he found no suggestion of willow ever being used to treat fevers and decided to experiment with it himself. Over the next seven years he successfully used the dried powder of willow bark to cure 'agues and intermittent fevers' of around fifty people, although it worked better when combined with quinine.[14]

Stone appears to have been largely ignored by the medical profession and herbalists alike. There are reports of two pharmacists using the remedy in trials, but there is no evidence that it worked.[15] By the early 20th century, Maud Grieve, an herbalist, did not consider White Willow to be a febrifuge. Instead, she describes using the bark and the powdered root for its tonic, antiperiodic and astringent qualities and recommended its use in treating dyspepsia, worms, chronic diarrhoea and dysentery.[16] She considered tannin to be the active constituent.

An active extract of the bark, called salicin, after the Latin name Salix, was isolated to its crystalline form in 1828 by Henri Leroux, a French pharmacist, and Raffaele Piria, an Italian chemist, who then succeeded in separating out the acid in its pure state. Salicylic acid is a chemical derivative of salicin and is widely used in medicine. Acetylsalicylic acid (aspirin) is, however, a chemical that does not occur in nature and was originally synthesised from salicylic acid[17] extracted from Meadowsweet, and is not connected to willow.[18]

References

  1. ^ a b c d e f Meikle, R. D. (1984). Willows and Poplars of Great Britain and Ireland. BSBI Handbook No. 4. ISBN 0-901158-07-0.
  2. ^ a b c d Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.
  3. ^ Mitchell, A. F. (1974). A Field Guide to the Trees of Britain and Northern Europe. Collins ISBN 0-00-212035-6
  4. ^ "Salix alba". RHS. Retrieved 17 February 2021.
  5. ^ "AGM Plants - Ornamental" (PDF). Royal Horticultural Society. July 2017. p. 85. Retrieved 11 October 2018.
  6. ^ "Salix alba 'Golden Ness". RHS. Retrieved 17 February 2021.
  7. ^ "Salix alba var. serica". RHS. Retrieved 17 February 2021.
  8. ^ "Salix alba var. vitellina 'Yelverton'". RHS. Retrieved 17 February 2021.
  9. ^ "Salix × sepulcralis 'Erythroflexuosa'". RHS. Retrieved 17 February 2021.
  10. ^ "'Salix × sepulcralis var. chrysocoma". RHS. Retrieved 17 February 2021.
  11. ^ "How to Make a Rooting Tonic". Retrieved 23 Aug 2015.
  12. ^ Shulchan Aruch Harav. Ch. 647: Kehot Publication Society. p. 332.{{cite book}}: CS1 maint: location (link)
  13. ^ Martyr, Phillippa. "Hippocrates and willow bark? What you know about the history of aspirin is probably wrong". Retrieved 5 January 2022.
  14. ^ Stone, Edward. "An Account of the Success of the Bark of the Willow in the Cure of Agues". The Royal Society. doi:10.1098/rstl.1763.0033. Retrieved 5 January 2022. {{cite journal}}: Cite journal requires |journal= (help)
  15. ^ Jeffreys, Diarmuid (2004). Aspirin: the story of a wonder drug. London: Bloomsbury.
  16. ^ Grieve, Maud (1931). A Modern Herbal. ISBN 9780880299213.
  17. ^ Fürstenwerth, Hauke (2011). "Letter by Fürstenwerth Regarding Article, "Aspirin: A Historical and Contemporary Therapeutic Overview"". Circulation. 124 (12): e332, author reply e333. doi:10.1161/CIRCULATIONAHA.111.038133. PMID 21931098. Retrieved 31 January 2022.
  18. ^ Propatier, Stephen. "The Mythology of Aspirin". Retrieved 12 January 2022.
license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN

Salix alba: Brief Summary

provided by wikipedia EN

Salix alba, the white willow, is a species of willow native to Europe and western and central Asia. The name derives from the white tone to the undersides of the leaves.

It is a medium to large deciduous tree growing up to 10–30 m tall, with a trunk up to 1 m diameter and an irregular, often-leaning crown. The bark is grey-brown and is deeply fissured in older trees. The shoots in the typical species are grey-brown to green-brown. The leaves are paler than most other willows because they are covered with very fine, silky white hairs, in particular on the underside; they are 5–10 cm long and 0.5–1.5 cm wide. The flowers are produced in catkins in early spring and are pollinated by insects. It is dioecious, with male and female catkins on separate trees; the male catkins are 4–5 cm long, the female catkins 3–4 cm long at pollination, lengthening as the fruit matures. When mature in midsummer, the female catkins comprise numerous small (4 mm) capsules, each containing numerous minute seeds embedded in silky white hairs, which aids wind dispersal.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN