C. Barre Hellquist
Aquatic and Wetland Plants of Northeastern North America Vol. 1
Pteridophytes, Gymnosperms, and Angiosperms
Aquatic and Wetland Plants of Northeastern North America, Volume I Vol. 1 : A Revised and Enlarged Edition of Norman C. Fassett's a Manual of Aquatic Plants, Volume I : Pteridophytes, Gymnosperms, and Angiosperms
Aquatic and Wetland Plants of Northeastern North America, Volume II Vol. 1 : A Revised and Enlarged Edition of Norman C. Fassett's a Manual of Aquatic Plants, Volume II : Angiosperms