Hypericum sphaerocarpum /St. Johnswort Family
There are 23 species of Hypericum listed in Tennessee, some are tricky to identify! The Rough-fruited species is often found in cedar glades; I found this one blooming at the Oak Ridge Cedar Barrens in early June. Plants in the Hypericum species cause photosensitivity in animals that eat them. For instance, horses, sheep, and goats with white patches on their skin can suffer sunburn, swelling, and redness in those areas. The lips, ears and eyelids are especially sensitive. The toxin is hypericum.
Where seen: Oak Ridge, Jefferson Middle School Cedar Barrens