Phaeosaccion is a genus of algae with monostromatic tubular to saccate thalli, up to long and to wide. It is classified in the family Phaeosacciaceae. It is olive brown and resembles young plants of Scytosiphon.Phaeosaccion, AlgaeBase The type species in the genus is Phaeosaccion collinsii, a species of marine algae. It was first identified in a publication by W.G. Farlow in the article Notes on New England algae published in Bulletin of the Torrey Botanical Club in 1882.Phaesaccion collinsii, AlgaeBase It was named in honor of Frank Shipley Collins.Makers of American Botany, Harry Baker Humphrey, Ronald Press Company, Library of Congress Card Number 61-18435 Phaeosacchion collinsii is red listed in Iceland as a vulnerable species (VU).Náttúrufræðistofnun Íslands [Icelandic Institute of Natural History] (1996). Válisti 1: Plöntur. (in Icelandic) Reykjavík: Náttúrufræðistofnun Íslands. References