Documenting the flora of the lower Susquehanna River in Pennsylvania and Maryland.

A geographic filter of all iNaturalist observations encompassing counties the Appalachian Trail goes throug...

This collection project includes invasive plant species (*often* non-native, aggressive, spreading & di...

As Master Watershed Stewards of Cumberland, Franklin & Adams counties, PA, you will come across lots of...

By excluding areas where known infestation is occurring, this should produce a map of new or unknown observ...