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

Brown University - Algae
Catalog #: ABRU00003739
M. A. Howe s.n.
Polysiphonia havanensis Montagne
United States, Florida, Key West, FL

Field Museum of Natural History
Catalog #: C0512758F
M. A. Howe #s.n.
Polysiphonia havanensis Montagne
United States, Florida, Monroe, Key West

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00221061
3dd9eb77-9096-47e0-9fc7-270a0f5e23e0
M. A. Howe #s.n.
Polysiphonia havanensis Montagne
United States, Florida, Barnstable, Key West

Miami University - Algae
Catalog #: 000188021
M.A. Howe #s.n.
Polysiphonia havanensis Montagne
United States, Florida, Monroe, Key West

Yale University Herbarium
Catalog #: YU.092126
Marshall A. Howe s.n.
Polysiphonia havanensis Montagne
United States, Florida, Monroe, Key West; Key West

University of Michigan
Catalog #: 668240
Marshall A. Howe #s.n.
Polysiphonia havanensis Montagne
United States, Florida, Monroe, Key West

University of Michigan
Catalog #: 668251
Marshall A. Howe #s.n.
Polysiphonia havanensis Montagne
United States, Florida, Monroe, Key West

Michigan State University Algae
Catalog #: MSC0184276
Marshall A. Howe #s.n.
Polysiphonia havanensis Montagne
United States, Florida, Monroe, Key West