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From: Hext, TX
Region: Southwest
Topic: Vines
Title: Identification of large egg-like objects on vines in Texas
Answered by: Nan Hampton
Mr. Smarty Plants thinks that perhaps this is the fruit/gourd of Cucurbita foetidissima (buffalo gourd). They are certainly large enough (about 3-4 inches in diameter) and would be dry and hard at the time of year that you found them.
Alternatively, they could be a plant gall. They can be caused by insects, mites, nematodes, fungi and bacteria. You can see photographs of various galls caused by insects on the Bug Guide. You don't say what kind of vine you found the growth on or if it's on the ground or growing up a tree, but crown gall is caused by a bacterium, Agrobacterium tumefaciens, and often infects grape vines.
If we haven't identified your mystery 'eggs' and you happen to have photos of them, please send them to us and we will do our very best to identify them. Visit Mr. Smarty Plants' Plant Identification page to read instructions for submitting photos.
Here are a few photos from our Image Gallery of the fruits of buffalo gourd:
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