[From ihe Bulletin of the Torrey Botanical Club, 38: 489-514, pis 27-34. 1 9 11 - 



Phycological studies — V. Some marine algae of Lower California, 



Mexico 



Marshall Avery Howe 



(with plates 27-34) 



So far as the writer is aware, the only paper in which the algae 

 of Lower California (Baja California) have been described or 

 noted is one by M. Paul Hariot, published in 1895.* In that paper 

 seven species, five marine and two from fresh water, were recorded ; 

 of the seven, three were described as new. In our list published 

 below, twenty-four species are definitely named and three others 

 have been referred simply to genera, and as these are all different 

 from the seven recorded by M. Hariot, we have now, for the 

 beginnings of our knowledge of the algal flora of Lower California, 

 some evidence of the existence there of at least thirty-four species. 

 The fact that none of the collections thus far made duplicates 

 any of the others even as to a single species may possibly be 

 taken as an indication that the algal flora of this region, when 

 better known, may prove to be rich and varied. The present 

 paper is based primarily on a collection made at La Paz on Feb- 

 ruary 28, 191 1, by Senor G. J. Vives, and submitted to the writer 

 for determination by the late Dr. Pehr Olsson-Seffer, chief of the 

 botanical section of the Departamento de Exploracion Biologica of 

 the agricultural bureau of the Mexican government. Senor Vives' 

 collection includes eighteen species, of which seven are described 

 below as new. In addition to this gathering, a collection of six 



* Algues du Golfe de Calif ornie recueillies par M. Diguet. Journal de Botan- 

 ique 9: 167-170. 1895. 



489 



