When going out on botanizing trips it's always a great deal of fun searching for butterflies that are associated with the plant...

In Pennsylvania, there are 7 species in the thistle genus Cirsium. Surprisingly, only two of the seven species of Cirsium are non-native...

Among many of the plants that rely on chlorophyll pigments to absorb light during photosynthesis, there are some that will parasitize or...