Artichoke gall on oak:: OS grid NS3878 :: Geograph Britain and Ireland

NS3878 : Artichoke gall on oak

near to Renton, West Dunbartonshire, Great Britain

Artichoke gall on oak

Also known as a hop gall, this growth (about 2cm long) is caused by the gall wasp Andricus fecundator. It is growing on a terminal bud, and the bud-scales which cover it give rise to its artichoke-like appearance. The structure contains an inner gall.

The mature gall looks very different ( Link

); it also gradually opens up. The inner gall then falls out, and continues to develop on the ground.

Several other kinds of oak gall have a similar shape, but they are less than 10mm in length [see "British Plant Galls" by Redfern & Shirley, Field Studies Council].

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year taken

2008

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Grid Square: NS3878, 119 images (more nearby)
Photographer: Lairich Rig (find more nearby)
Image classification^?: Supplemental image
Date Taken: Thursday, 4 September, 2008 (more nearby)
Submitted: Thursday, 4 September, 2008
Geographical Context: Woodland, Forest
Image Buckets ^?: Closeup Life
Category: Galls (more nearby)
Subject Location: OSGB36: NS 382 783 [100m precision]
WGS84: 55:58.2600N 4:35.5929W
Photographer Location: OSGB36: NS 382 783
View Direction: North-northeast (about 22 degrees)