Taxonomy and phytogeography of Philippine Cystoseiraceae (Phaeophyta: Fucales)

A taxonomic survey was made of the Philippine species of the brown algal family Cystoseiraceae. Two species in two genera are herein reported: Hormophysa cuneiformis P.C. Silva and Cystoseira trinodis C. Agardh. Based on herbarium records examined, the former is more widespread in the waters around the Philippines while the latter is apparently more limited in distribution. Both species have been reported in the literature under several names which have been verified in this study by re-examining available voucher specimens. The present report of C. trinodis constitutes the first record for the marine flora of the Philippines.