| TITLE (opens new window) | DESCRIPTION |
| Invasive And Exotic Species of North America |
Descriptions, management issues, warnings, photos, etc. |
| USDA Plants Database |
Federal Distribution and detailed information including photos |
| USDA Agricultural Research Service (ARS) |
Images of seeds, fruits, embryos, etc. |
| Dan Tenaglia's The Missouri Flora |
Fabulous photographs; detailed descriptions; color and leave arrangement key. |
| David G. Smith's "Delaware Wilflowers" |
Beautiful photographs; descriptions |
| Illinois Wildflowers |
Wonderful photographs; detailed descriptions; color and leaf arrangement key |
| Southwest School of Botanical Medicine |
Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada" |
| Landscape Plants of the Upper Midwest; UW-Extension |
Interactive guide providing information on cultivation including: soil, zone, growth rate, landscape uses, pruning, light requirements; with photos and Latin name pronounciation |