158 Minnesota Algae 



Haven. November 1896. (Holden). Pennsylvania. "Distributed by WoUe 

 under name ofPhormidium congestum * * * probably col- 

 lected in Pennsylvania." — Setchell. Ohio. Brush Lake, Champaign Coun- 

 ty. (Riddle). 



303. Microcoleus paludosus (Kuetzing) Gomont. Monogr. Oscill. 96. pi. 14. 



f. 13. 1893. De Toni. Syll. Algar. 5: 376. 1907. 

 Setchell. Notes on Cyanophyceae. III. Erythea. 7: 53. 1899. Bessey, 

 Pound and Clements. Additions to the Reported Flo'ra of the State. Bot. 

 Surv. Nebraska. 5: 13. 1901. Collins, Holden and Setchell. Phyc. Bor.- 

 Am. Fasc. 17. no. 802. 1901. Tilden. American Algae. Cent. VII. Fasc. 

 I. no. 634. 1909. 



Plate VI. fig. 30. 



Filaments entangled, twisted, simple or forked at the apex, growing 

 among other algae or forming a blackish or blue-green stratum; sheaths 

 moderately mucous, open and disappearing at the apex or closed and 

 pointed; trichomes 5-7 mic. in diameter, not constricted at joints, parallel, 

 straight, or twisted into cords; apical cell not capitate; cells 4-13 mic. in 

 length; transverse walls not granulated; cell contents light blue-green. 



Rhode Island. (Osterhout). Nebraska. On wet soil in greenhouse. 

 Lincoln. (Bessey). California. In southern part of the state. (Parish). 

 In conservatory. Golden Gate Park, San Francisco. September 1900. (Gard- 

 ner). In greenhouses. University of California, Berkeley. (Setchell). Ha- 

 v/aii. With other algae forming a layer covering rocks on bottom and sides 

 of basin of "warm spring." Temperature at 7 a. m. 31 + ° C. Puna, Island 

 of Hawaii. July 1900. (Tilden). 



304. Microcoleus pulvinatus Wolle. Fresh-Water Algae U. S. 305. pi. 204. 



f. 10-14. 1887. De Toni. Syll. Algar. 5: 379. 1907. 

 Wolle and Martindale. Algae. Britton's Catalogue of Plants found 

 in New Jersey. Geol. Surv. N. J. 2: 609. 1889. 



Plate VI. fig. 31. 



Plant mass large, cushion-like, often 1.5 dm. in diameter, about S cm. 

 in thickness, somewhat hollow in the center, dark olive brown, gelatinous- 

 membranaceous; filaments 12-30 mic. in diameter; trichomes 5-6 mic. in 

 diameter, one, two or three in a sheath. 



New Jersey. "The thalli', of all possible sizes from one to ten inches 

 in diameter, are attached to stones and grasses, looking like boulders in ths 

 bottom of a mill race with rapidly running water.'' Baraber. (Wolle). 



305. Microcoleus subtorulosus (Kuetzing) Gomont. Essai Class. Nosto- 



cacees homocystees. Morot. Journ. de Bot. 4: 352. 1890; Monogr. 



Oscill. 98. pi. 14. f. 14, IS. 1893. De Toni. Syll. Algar. 5: 378. 1907. 

 Wolle. Fresh Water Algae. Bull. Torr. Bot. Club. 6: 283. 1879. (Ph. 

 subtorulosum Breb.) ; Fresh- Water Algae U. S. 300. pi. 202. f. 3, 4. 

 1887. (Lyngbya subtorulosa (Breb.) Wolle). Buchanan. Notes 

 on the Algae of Iowa. Proc. Iowa Acad. Sci. 14: 13; 1908. 



