Collins, Holden & Setchell, Phycoth. Bor.-Amer.
Collins, F.S.; Holden, I.; Setchell, W.A. [1-2300]

Brown University - Algae
Catalog #: ABRU00004912
C. Bullard s.n. 14 June 1916
Closterium rostratum Ehrenberg ex Ralfs
United States, Massachusetts, Hoosiewhissick Pond, Milton, MA

Yale University Herbarium
Catalog #: YU.095381
Charles Bullard s.n. 14 June 1916
Closterium rostratum Ehrenberg ex Ralfs
United States, Massachusetts, Milton; Hoosiewhissick Pond, Milton, MA

University of Michigan
Catalog #: 736044
Charles Bullard #s.n. 14 June 1916
Closterium rostratum Ehrenberg ex Ralfs
United States, Massachusetts, Norfolk, shore of Hoosiewhissick Pond, Milton

Michigan State University Algae
Catalog #: MSC0182066
Charles Bullard #s.n. 14 June 1916
Closterium rostratum Ehrenberg ex Ralfs
United States, Massachusetts, Norfolk, shore of Hoosiewhissick Pond, Milton

Miami University - Algae
Catalog #: 000210147
Charles Bullard #s.n. 14 June 1916
Closterium rostratum Ehrenberg ex Ralfs
United States, Massachusetts, Norfolk, shore of Hoosiewhissick Pond, Milton