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

Brown University - Algae
Catalog #: ABRU00003964
B. M. Davis s.n.
Polysiphonia fibrillosa (Dillwyn) Sprengel
United States, Massachusetts, Butler's Point, Woods Hole, MA

Yale University Herbarium
Catalog #: YU.106614
Bradley Moore Davis s.n.
Polysiphonia fibrillosa (Dillwyn) Sprengel
United States, Massachusetts, Falmouth; Butler's Point, Woods Hole, MA