| TITLE (opens new window) | DESCRIPTION |
| Floristic Ratings |
Coefficient of Conservatism = 9 |
| WIS DNR-Bureau of Endangered Resources |
Detailed information on Wisconsin listed species including state and federal status, photos, etc. |
| 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. |
| USDA Agricultural Research Service (ARS) |
Images of seeds, fruits, embryos, etc. |
| David G. Smith's "Delaware Wilflowers" |
Beautiful photographs; descriptions |
| Royal Society Publishing |
" Kin recognition in an annual plant" |
| Southwest School of Botanical Medicine |
Britton & Brown Illustrated Flora - 2nd Edition (1913) "An Illustrated Flora of the Northern United States and Canada" |