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

Brown University - Algae
Catalog #: ABRU00004217
M. A. Howe s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, eastern end of Mariguana Island, Bahamas

Yale University Herbarium
Catalog #: YU.094524
Marshall A. Howe s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, eastern end of Mariguana Island, Bahamas

Field Museum of Natural History
Catalog #: C0532747F
Marshall A. Howe #s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, Mayaguana, At the eastern end of Mariguana Island

University of Michigan
Catalog #: 731037
Marshall A. Howe #s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, Mariguanas

University of Michigan
Catalog #: 731064
Marshall A. Howe #s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, Mariguanas

Michigan State University Algae
Catalog #: MSC0183964
Marshall A. Howe #s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, Eastern end of Mariguana Island

Miami University - Algae
Catalog #: 000188552
Marshall A. Howe #s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, Eastern end of Mariguana Island

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00205530
1158052b-0eb8-44ac-b35d-18143cb0c103
Marshall A. Howe #s.n. 12 December 1907
Penicillus pyriformis A.Gepp & E.S.Gepp
Bahamas, Mayaguana, At the eastern end of Mariguana Island