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

Brown University - Algae
Catalog #: ABRU00003589
N. L. Gardner s.n.
Microcoleus chthonoplastes (Mertens) Zanardini
United States, Washington, Penn's Cove, Whidbey Island, WA

Michigan State University Algae
Catalog #: MSC0182128
N.L. Gardner #s.n.
Coleofasciculus chthonoplastes (Thuret ex Gomont) M.Siegesmund, J.R.Johansen & T.Friedl
United States, Washington, Island, Pen's Cove, Whidbey Island

Miami University - Algae
Catalog #: 000187568
N.L. Gardner #s.n.
Microcoleus chthonoplastes (Mertens) Zanardini
United States, Washington, Island, Pen's Cove, Whidbey Island

Yale University Herbarium
Catalog #: YU.091989
Nathaniel Lyon Gardner s.n.
Microcoleus chthonoplastes (Mertens) Zanardini
United States, Washington, Island, Penn's Cove, Whidbey Island, WA