Slide shows – the slideshows have to be converted to a format viewable in Google Docs.

Philadelphia Natural History
http://public.iwork.com/document/?d=phila-natural-history.key&a=p127902911

Pennsylvanina: a physiographic map – Map (pdf)

Spring Blooming Plants of Philadelphia
http://public.iwork.com/document/?d=spring-blooming.key&a=p127902911

Summer Blooming Plants of Philadelphia
http://public.iwork.com/document/?d=summer-blooming.key&a=p127902911