Gall-ish

Plenty of oaks yet to turn color in the Hudson Highlands, 60 miles north of Brooklyn.

And where there are oaks, there are galls. Here’s one I came across up there recently:Not sure what species is inside here.

To re-cap, galls are formed by the interaction of animal and plant. Irritated by wasp, mite, aphid, midge, even nematode, etc., the plant is stimulated into forming a growth which is then used by the animal to protect its eggs, foster its larval stages, etc. Galls can be found on all parts of a plant, leaves, flowers, stems, bark, roots. The most obvious are the ones on the leaves, and oaks in particular seem to have a strong affinity, if that’s the word, for gall-making insects that create oddly wonderful oak “apples.” The plant is generally not harmed by this interrelationship, the benefits of which are partaken by well over 1000 (in North American) species of insects.

Here are some of my previous adventures amongst the galls.

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3 Responses to “Gall-ish”


  1. 1 Elizabeth White October 27, 2012 at 9:24 am

    So all Galls are NOT divided into three parts? :)

  2. 3 alphonsegaston October 27, 2012 at 5:01 pm

    I went back to your previous gall posts and identified a gall I have seen on my willow shrub. Actually, attractive. I have also seen hedgehog galls, did not know what they were, and regular more common ones as well.


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