Welcome to Gallformers
The place to identify and learn about galls on plants in the US and Canada.
Identify a Gall →
Try and get an Identity for a gall by providing known information.
Explore Galls (including Undescribed species) and Host Plants.
Here is a random gall from our database. This one is called
Cynips heldae (agamic)
and the photo was taken by
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Help Us Out
If you find gallformers.org useful and you are interested in helping us out there are a few ways you can do so:
Help cover operational costs via donations to our Patreon
Help add and maintain our data as an Administrator
Help fix bugs and add new features
Our guide to gall identification.
Detailed descriptions for our key filters.
Glossary for plant and insect terms.
To ID galls and other plant symptoms in Europe, visit
If you are new to galls
and Noah Charney's
Tracks & Signs of Insects & Other Invertebrates: A Guide to North American Species
is a good place to start learning. It covers a lot more than just galls and is an excellent resource.
A long-anticipated update to
Russo's guide to galls of the Western US
was recently released by Princeton University Press.
advice on finding galls