Oak Marble Gall.

Sunrise 08:15 am      Sunset: 04:19 pm

For those who are interested in how galls are formed:

Insect galls are the highly distinctive plant structures formed by particular herbivorous insects. They are plant tissue controlled by the insect. Galls offer a habitat and food source for the maker of the gall. The interior of a gall can contain edible nutritious starch and other tissues. Galls may also provide the insect with physical protection from predators.

Insect galls are usually induced by chemicals injected by the larvae or the adults of the insects into the plants, and possibly mechanical damage. After the galls are formed, the larvae develop inside until fully grown, when they leave.

The meristems, where plant cell division occurs, are the usual sites of galls, though insect galls can be found on other parts of the plant, such as the leaves, stalks, branches, buds, roots, and even flowers and fruits. Gall-inducing insects are usually species-specific and sometimes tissue-specific on the plants they gall.

Gall wasps (Cynipidae), also called Gallflies, are a family of the order Hymenoptera and are classified with the Apocrita suborder of wasps in the superfamily Cynipoidea. About 1300 species of this generally very small creature (1-8 millimeters) are known worldwide, with about 360 species of 36 different genera in Europe and some 800 species in North America.

IMG_166811TH JANUARY 201311TH JANUARY 2013a

8 Comments on “Oak Marble Gall.

  1. Fascinating. I love the information you add to some of your photographs. It would be good to see all those posts in a collection and maybe a book.

      • I already follow your blog Mike and have put a link to it from my blog. You don’t supply information with every image though. I just thought it might be nice to pull your best ones together into a book. As well as doing greeting cards of course. 😉

      • I am glad your think my images worthy of something other than a blog post, Joyce. Your comments are always offer enthusiasm and encouragement, and I am always pleased to read them. Thank you. I too have a link to your blog on my home page. 🙂

Leave a Reply

%d bloggers like this: