Pilularia americana
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- Evolution of Leaf Form in Marsileaceous Ferns: Evidence for Heterochrony
- First Record of Pilularia Americana A. Braun (Polypodiidae, Salviniales, Marsileaceae) from Peru
- Molecular Phylogenetic Relationships and Morphological Evolution in the Heterosporous Fern Genus Marsilea
- A Synopsis of the Ferns and Fern Allies of Nebraska, with Maps of Their Distribution Steven B
- Fort Simcoe State Park
- Threats and Responses
- Three Granite Outcrop Plants
- California Native Plant Society – Vascular Plants Fort Ord Blm Area
- Checklist of the Vascular Plants of San Diego County 5Th Edition by Jon P
- Field Release of the Salvinia Weevil
- Midwest 2016 Regional Wetland Plant List
- Heiser, C.B., Jr