The Info List - Salix Cinerea

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Salix cinerea
Salix cinerea
(grey willow; also occasionally large gray willow[1] or grey sallow) is a species of willow native to Europe
and western Asia.[2][3] The plant provides a great deal of nectar for pollinators. It was rated in the top 10, with a ranking of second place, for most nectar production (nectar per unit cover per year) in a UK plants survey conducted by the AgriLand project which is supported by the UK Insect Pollinators


1 Plant 2 Ecology 3 Invasive species 4 References


Close-ups of Salicaceae

It is a deciduous shrub or small tree growing to 4–15 m (13–49 ft) high. The leaves are spirally arranged, 2–9 cm long and 1–3 cm broad (exceptionally up to 16 cm long and 5 cm broad), green above, hairy below, with a crenate margin. The flowers are produced in early spring in catkins 2–5 cm long; it is dioecious with male and female catkins on separate plants. The male catkins are silvery at first, turning yellow when the pollen is released; the female catkins are greenish-grey, maturing in early summer to release the numerous tiny seeds embedded in white cottony down which assists wind dispersal.[2][3] The two subspecies are:[2][3]

S. c. cinerea - central and eastern Europe, western Asia, shrub to 4–6 m (rarely 10 m) tall, with smooth bark, leaves densely hairy below with pale yellow-grey hairs, stipules large, persistent until autumn S. c. oleifolia (Sm.) Macreight (syn. S. atrocinerea Brot.) - western Europe, northwest Africa, shrub or tree to 10–15 m tall, with furrowed bark, leaves thinly hairy below with dark red-brown hairs, stipules small, early deciduous

Some overlap in the distributions (not indicated in the map, right) occurs, with both occurring in a broad band north to south through France, and scattered specimens of S. c. cinerea west to Ireland, western France, and Morocco; scattered specimens of S. c. oleifolia occur east to the Netherlands. Specimens of S. c. oleifolia in southern Scandinavia are planted or naturalised, not native. Intermediate specimens also occur.[2][3] Ecology[edit]

Salix cinerea
Salix cinerea
seeds on a birch tree branch

It usually grows in wetlands. The two subspecies differ slightly in requirements, with S. c. cinerea generally restricted to basic marshland and fen habitats, while S. c. oleifolia is less demanding, occurring in both alkaline marshes and acidic bogs and streamsides.[2] A common herbivore of Salix cinerea
Salix cinerea
is Phratora vulgatissima, which prefers and is more common on female plants.[5] Anthocoris nemorum, a natural enemy of Phratora vulgatissima, is also more common on S. cinerea.[5] Invasive species[edit] S. cinerea is an invasive species in New Zealand
New Zealand
and is listed on the National Pest Plant
Accord, which means it cannot be sold or distributed. References[edit]

^ "Salix cinerea". Natural Resources Conservation Service
Natural Resources Conservation Service
PLANTS Database. USDA. Retrieved 26 October 2015.  ^ a b c d e Meikle, R. D. (1984). Willows and Poplars of Great Britain and Ireland. BSBI Handbook No. 4. ISBN 0-901158-07-0. ^ a b c d Christensen, K. I., & Nielsen, H. (1992). Rust-pil ( Salix cinerea
Salix cinerea
subsp. oleifolia) - en overset pil i Danmark og Skandinavien. Dansk Dendrologisk Årsskrift 10: 5-17. ^ "Which flowers are the best source of nectar?". Conservation Grade. 2014-10-15. Retrieved 2017-10-18.  ^ a b Kabir, Faisal MD; Moritz, Kim K; Stenberg, Johan A (2015-04-19). "Plant-sex-biased tritrophic interactions on dioecious willow". Ecosphere. doi:10.1890/ES14-00356.1. 

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Taxon identifiers

Wd: Q157540 APDB: 198517 EoL: 584272 EPPO: SAXCI FloraBase: 31594 FNA: 200005797 FoC: 200005797 GBIF: 5372605 GRIN: 32699 iNaturalist: 168326 IPNI: 777326-1 ITIS: 22519 IUCN: 19620468 NCBI: 470278 PalDat: Salix_cinerea Plant
List: kew-5001635 PLANTS: SACI Tropicos: 283