108 UNIVERSITY OF COLORADO STUDIES 



Anabaena circinalis Rabenhorst. [Tilden, Minn. Alg., p. 190.] 



Redrock Lake, August 18, 1908, Ramaley (1). 

 A. flos-aquae (Lyngbye) Brebisson. [Tilden, Minn. Alg., p. 189.] 



Park Lake, near Tolland, very abundant, forming a blue-green scum along the shores 

 where it is drifted by the wind, July 28, 191 1, Robbins. 

 A. oscillarioides var. stenospora Bornet & Flahault. [Tilden, Minn. Alg., p. 194.] 



"Colorado. On aquatic plants in slowly flowing stream in swamp. Five miles 

 southeast of Fort Collins, July, 1896 (Cowen)." Tilden. 



Family SCYTONEMACEAE 

 Scytonema crispum (Agardh) Bornet. [Tilden, Minn. Alg., p. 214.] 



"Colorado (Brandegee)." Tilden. 

 S. mirabile (Dillwyn) Bornet. [Tilden, Minn. Alg., p. 222.] 



"Colorado. In pannose layers upon the 'Pillars of Hercules,' South Cheyenne 

 Canyon, near Manitou (Setchell)." Tilden. 

 S. myochrous (Dillwyn) Agardh. [Tilden, Minn. Alg., p. 224.] 



"Wet rocks (Brandegee)." Tilden. 

 Tolypothrix distorta (Hofman-Bang) Kuetzing. [Tilden, Minn. Alg., p. 231.] 



Lily Lake, attached to plants in the water, July 13, 1911, Brannaman (69); East 

 Forest Lake, attached to Fontinalis sp., July 25, 191 1, Robbins (79). 



Family STIGONEMACEAE 



Hapalosiphon fontinalis (Agardh) Bornet. [Tilden, Minn. Alg., p. 239.] 



Teller Lake, attached to stems of Carex utrkulata July 20, 1911, Brannaman (74). 



Family RIVULARIACEAE 

 Calothrix parietina (Naegeli) Thuret. [Tilden, Minn. Alg., p. 269.] 



"Colorado. Wet rocks, Canyon City (Brandegee)." Tilden. 

 Rivularia haematites (DC.) Agardh. [Tilden, Minn. Alg., p. 290.] 



" Colorado. Forming a reddish crust upon dripping rocks, Bridal Veil Falls, Williams 

 Canyon, near Manitou (Setchell)." Tilden. 

 R. natans (Hedwig) Welwitsch. [Tilden, Minn. Alg., p. 285.] 



Smartweed Lake, forming colonies on submerged parts of Myriophyllum, July 4, 

 1910, Dodds (D504). 



Class HETEROKONTAE 

 Order CONFERVALES 



Family CONFERVACEAE 

 Ophiocytium parvulum (Perty) A. Braun. [Collins, Green Alg. of N.A., p. 94.] 



University Lake, Boulder, July 8, 1908, Dodds (D248); East Lake, near Tolland, 

 June 13, 1909, Ramaley (19); Corona Lake, July 23, 1911, Brannaman (76). 

 Conferva bombycina Agardh. [Collins, Green Alg. of N.A., p. 96.] 



Stagnant pool near Goose Lake, September 3, 1905, Ramaley (7); Yankee Doodle 

 Lake, August 28, 1908, Ramaley (6); Jenny Lake, July 8, 1910, Robbins; Corona Lake, 

 July 23, 191 1, Robbins. 



