This is a great app. I have used it on my hikes to identify trees as well as wildflowers. It is pretty comprehensive and easy to use. You enter certain parameters such as type of plant, color of flower, number of petals, leaf arrangement, location, month and habitat, and then choose your plant from photos of the results. There are even links to different websites if you want more information on your plant. I really like that this app is limited to Pennsylvania, which narrows the field of possibilities so you're likely to find what you're looking for. Thanks for creating this app!
Updated species. Added more plant photos and descriptions. Fixed the no-link bug.