:Penium

{{Short description|Genus of algae}}

{{Automatic taxobox

| image = Penium polymorphum (PERTY) PERTY 68x25m.jpg

| image_caption = Penium polymorphum

| taxon = Penium

| authority = Bréb. ex Ralfs

| subdivision_ranks = Species

| subdivision =

• P. cylindrus
• P. exiguum
• P. margaritaceum
• P. spirostriolatum

}}

Penium is a genus of green algae, and the sole member of the family Peniaceae.See the NCBI [https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=102168 webpage on Penium]. Data extracted from the {{cite web | url=http://ftp.ncbi.nih.gov/pub/taxonomy/ | title=NCBI taxonomy resources | publisher=National Center for Biotechnology Information | accessdate=2007-03-19}} The genus contains about 39 species.