NS3976 : Leaf gall on wych elm

taken 3 years ago, near to Renton, West Dunbartonshire, Great Britain

Leaf gall on wych elm
Leaf gall on wych elm
This kind of gall, in which half of the leaf is rolled up, is common and widespread on elm trees, and is caused by aphids, usually (as here) those of the species Eriosoma ulmi, in which case the gall contains wax. Galls that look like this are less commonly formed by the species Eriosoma grossulariae, in which case they do not contain wax.

The gall was on a wych elm (Ulmus glabra) standing on the eastern side of the footpath / cycle path: see NS3976 : Cycle path near Dalreoch, where that tree is shown on the right.

There were several of these galls on that tree, as well as at least one fig gall (see NS3977 : Fig gall on wych elm, showing one on a different tree). A rarer kind of gall was also present: NS3976 : Leaf galls on wych elm.
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NS3976, 187 images   (more nearby )
Photographer
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Date Taken
Monday, 8 August, 2016   (more nearby)
Submitted
Sunday, 21 August, 2016
Geographical Context
Woodland, Forest 
Primary Subject of Photo
Leaf 
Image Buckets ?
Life  Closeup 
Subject Location
OSGB36: geotagged! NS 3901 7644 [10m precision]
WGS84: 55:57.2357N 4:34.8035W
Camera Location
OSGB36: geotagged! NS 3901 7644
View Direction
East-southeast (about 112 degrees)
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Plant Gall 

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