Penicillus lamourouxii
- kingdom: Plantae
- phylum: Chlorophyta
- class: Ulvophyceae
- order: Bryopsidales
- family: Udoteaceae
- genus: Penicillus
- species: Penicillus lamourouxii
- Colonel Hill
Crooked Island and Long Cay- George Town
Exuma- Duncan Town
Ragged Island
Bahamas- Sandy Bay
Bay Islands
Honduras- Port Royal
Kingston- Manchioneal
Portland- Runaway Bay
St Ann
Jamaica- Guánica
Guanica
Puerto Rico- Cutler
- East Perrine
- Key West
- Marathon
- Palmetto Bay
Florida
United States