PRELIMINARY LIST OF THE ALGAE OF COLORADO 107 



Family CHAMAESIPHONACEAE 



Chamaesiphon incrustans Grunow. [Tilden, Minn. Alg., p. 55.] 

 Corona, on Conferva, July 25, 1911, Brannaman (77). 



Order HORMOGONALES 

 Family OSCLLLATORIACEAE 



Oscillatoria cuxviceps Agardh. [Tilden, Minn. Alg., p. 67.] 



"Colorado. On surface of slow-flowing water in swamp. Five miles east of Fort 

 Collins, July, 1896, Cowen." Tilden. 

 O. formosa Bory. [Tilden, Minn. Alg., p. 80.] 



Tolland, June 25, 1910, Robbins; Boulder, sides of aquarium jar in biological labora- 

 tory, University of Colorado, January 26, 1911, Robbins. 

 O. limosa Agardh. [Tilden, Minn. Alg., p. 65.] 



Wet Mountain Valley, 1889, Cockerell. 

 O. splendida Greville. [Tilden, Minn. Alg., p. 76.] 



Wet Mountain Valley, 1889, Cockerell. 

 O. tenuis Agardh. [Tilden, Minn. Alg., p. 71.] 



Yankee Doodle Lake, August 28, 1908, Ramaley (6); Teller Lake, June 23, 1909, 

 Robbins (8). 

 Spirulina major Kuetzing. [Tilden, Minn. Alg., p. 87.] 



Pond near Boulder, in stagnant water, October 30, 1910, Robbins (59). 

 Phormidium tenue (Meneghini) Gomont. [Tilden, Minn. Alg., p. 98.] 



East Lake, near Tolland, June 13, 1909, Ramaley (19); Boulder, in water fountain, 

 March 8, 1910, Robbins (20). 

 Lyngbya aerugineo-caerulea (Kuetzing) Gomont. [Tilden, Minn. Alg., p. 116.] 



Park Lake, near Tolland, forming a blackish mass along with other algae, July 8, 191 1, 

 Robbins. 

 L. majuscula (Dillwyn) Harvey. [Tilden, Minn. Alg., p. 123.] 



Eagle Lake, surface tow, August 19, 1903, Juday (48). 



Family NOSTOCACEAE 

 Nostoc comminutum Kuetzing. [Tilden, Minn. Alg., p. 165.] 



North Forest Lake, floating in water, August 31, 1908, Dodds (D374); Lily Lake, 

 July 14, 191 1, Brannaman (69). 

 N. pruniforme (L.) Agardh. [Tilden, Minn. Alg., p. 178.] 



Marshall, at bottom of ditch, March 30, 1910, Robbins (18). 

 N. sphaericum Vaucher. [Tilden, Minn. Alg., p. 173.] 



Wet Mountain Valley, 1889, Cockerell. 

 N. verrucosum (L.) Vaucher. [Tilden, Minn. Alg., p. 179.] 



Gregory Canyon, near Boulder, attached to stones in running water, October 15. 

 1910, Robbins. 

 Nodularia paludosa Wolle. [Tilden, Minn. Alg., p. 183.] 



"Colorado, Wolle." Tilden. 



