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Elm in winter

Observed: 10th January 2013 By: Rachy RamoneRachy Ramone is knowledgeable about PlantsRachy Ramone’s earned reputation in PlantsRachy Ramone’s earned reputation in PlantsRachy Ramone’s earned reputation in PlantsRachy Ramone’s earned reputation in Plants
Trunk of young Elm tree
Some twigs have corky wings...
....and some do not.
Often covered in lichen.
pattern of twigs
Description:

Quite distinctive bark, even on young trees (which is what you will mostly find, these days), often found in hedgerows, as they sucker freely.
Some younger branches might have the distinctive corky wings (the only other tree with corky wings is Field Maple, Acer campestris, which has buds held in opposite pairs, not alternate as we have here) but some don't: there doesn't seem to be any rhyme or reason for it.
Generally, the branches/twigs make a rough herringbone pattern.

Identifications
Species interactions

No interactions present.

Species with which Elm (Ulmus) interacts