PRELIMINARY LIST OF THE ALGAE OF 

 COLORADO 1 



By Wilfred W. Robblns 



The following list of Colorado algae attempts to give all the known 

 recorded species from the state together with a number of additions 

 resulting from the writer's studies during the past three years. A few 

 Colorado records are given in F. Wolle's Fresh-Water Algae of the 

 United States, also in Miss Josephine E. Tilden's Minnesota Algae and 

 Frank S. Collins' The Green Algae oj North America. In 1889 Professor 

 T.D. A. Cockerell 2 published a short list of algae from the Wet Moun- 

 tain Valley. The identification of this material was made by Wolle, 

 except one species which was named by Dr. W. G. Farlow. In 1903 

 Joseph A. Cushman 3 published a list of desmides from southwestern 

 Colorado, based upon a collection made by Tower at the head of 

 Tank Creek, altitude 10,970 feet. 



The writer has examined the greater portion of the algal collection 

 at the University of Colorado, this material having been accumulated 

 by members of the biological staff for a number of years back; he has 

 also been permitted to examine the collection of Entomostraca from 

 Colorado lakes and ponds, made by Dr. G. S. Dodds, and has found 

 in this a goodly number of species of algae. This material has also 

 afforded additional locality records. Several students at the Univer- 

 sity of Colorado Mountain Laboratory for Field Biology at Tolland 

 have rendered valuable assistance by their collections and studies. 

 Louise Falk Robbins, while a student at the University of Colorado, 

 helped to look over a number of vials and made drawings of some of 

 the doubtful species. 



The List is only a preliminary one; a number of doubtful species 



1 Publication of the Colorado Biological Survey, No. II. 



■ Cockerell, T. D. A., "Contributions toward a List of the Fauna and Flora of the Wet Mountain 

 Valley, Colorado," West American Scientist, Vol. VI, pp. 153-155, Nov., 1889. 



'Cushman, Joseph A., "Desmids from Southwestern Colorado," Bull. Torr. Bot. Club, Vol. XXXI, 

 pp. 161-164, 1904. 



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