| Ref ID | Type | Author | Date | Title |
|
25610
| Database | Calflora | 2021 | The Calflora Database: Information on California plants for education, research and conservation |
|
27378
| Database | Cranberg, C., and R. Keller | 2020 | Illinois Database of Aquatic Non-native Species |
|
26212
| Database | GBIF | 2013 | Global Biodiversity Information Facility (GBIF) Database. |
|
30307
| Database | Gerber, D. (curator). | 2016 | University of Wisconsin Herbarium (UWL) |
|
13439
| Web Page | IPANE. | 2001 | Invasive Plant Atlas of New England (IPANE) at the University of Connecticut online database. |
|
10741
| Journal Article | Les, D.H., and L.J. Mehrhoff. | 1999 | Introduction of nonindigenous aquatic vascular plants in southern New England: a historical perspective. |
|
10574
| Journal Article | Les, D.H., and R.L. Stuckey | 1985 | The introduction and spread of Veronica beccabunga (Scrophulariaceae) in eastern North America |
|
28190
| Database | Louisiana State University | 2020 | Shirley C. Tucker Herbarium (LSU) |
|
703
| Journal Article | Mills, E.L., J.H. Leach, J.T. Carlton, and C.L. Secor | 1993 | Exotic species in the Great Lakes: a history of biotic crises and anthropogenic introductions |
|
10518
| Database | Pennsylvania Flora Database. | 2011 | Pennsylvania Flora Project |
|
28182
| Database | Re, R. (curator), and C. Niezgoda (manager). | 2015 | Field Museum of Natural History (F) Seed Plant Collection |
|
31186
| Database | Reznicek, AA, E.g., Voss, and B.S. Walters. | 2011 | Michigan Flora Online |
|
28055
| Database | University of California Berkeley | 2019 | University Herbarium (UC) |
|
10002
| Database | USDA, NRCS. | 1997 | The PLANTS database (http://plants.usda.gov). |
|
10676
| Book | Voss, E.G. | 1996 | Michigan Flora: A Guide to the Identification and Occurrence of the Native and Naturalized Seed-plants of the State. Part III Dicots (Pyrolaceae-Compositae). |
