Myxophyceae 171 



1892; in stream, Wotten Waven, January and February 1896, Dominica. 

 (Elliott). 



322. Nostoc foliaceum Mougeot. Stirpes Vogeso-Rhenanae. Fasc. 14. no. 



1372. 1854. Bornet and Flahault. Revis. des Nostoc. Ann. Sci. Nat. 



Bot. VII. 7: 202. 1888. De Toni. Syll. Algar. 5: 403. 1907. 

 Tilden. American Algae. Cent. V. no. 485. 1901; Collection of Algae 

 from the Hawaiian Islands. Hawaiian Almanac and Annual for 1902. 112. 

 1901; Algae Collecting in the Hawaiian Islands. Postelsia: The Year Book 

 of the Minnesota Seaside Station, i: 168. 1902. 



Plate VII. fig. 16. 



Plant mass gelatinous, spongy, lacunose, somewhat pellucid, green 

 or olive, becoming brownish; filaments flexuous, entangled, pale blue- 

 green; trichomes 4 mic. in diameter; cells spherical compressed; hetero- 

 cysts 7 mic. in diameter, somewhat spherical; gonidia 7 mic. in diameter, 

 7-10 mic. in length, often oval; wall of gonidium smooth, colorless. 



Hawaii. In globules among mosses and liverworts on dripping cliflfs 

 at side of road. South of Laupahoehoe, Hawaii. July 1900. (Tilden). 



323. Nostoc punctatum Wood. Contr. Hist. Fresh-Water Algae North 



America. 32. 1874. De Toni. Syll. Algar. 5: 404. 1907. 



Plant mass expanded, irregular or orbicular, very thin, small, mem- 

 branaceous, pellucid, blue-green; filaments loosely interwoven, variously 

 curved; cells 4 mic. in diameter, globose or often elliptical, mostly pellucid 

 in the center, loosely connected; heterocysts S mic. in diameter, terminal 

 or intercalary. 



New Jersey. Damp Ground. September. (Austin). 



324. Nostoc commune Vaucher. Histoire des Conferves d'eau douce. 222. 



pi. 16. f. I. 1803. Bornet and Flahault. Revis. des Nostoc. Ann. 



Sci. Nat. Bot. VII. 7: 203. 1888. De Toni. Syll. Algar. 5: 404- 



1907. 

 Harvey. Nereis Boreali Americana. Part III. 113, 114- Suppl. II. 134. 

 1858. (N. verrucosum Rabenh., N. arcticum Harv.). Dickie. 



Algae. Hooker. An Account of the Plants collected by Dr. Walker in 

 Greenland and Arctic America during the Expedition of Sir Francis 

 M'Clintock, R. N., in the Yacht "Fox." Journ. Linn. Soc. Bot. 5: 86. 1861; 

 Notes on a Collection of Algae procured in Cumberland Sound by Mr. 

 James Taylor, and Remarks on Arctic Species in General. Journ. Linn. 

 Soc. Bot. 9: 240. 1867. Wood. Contr. Hist. Fresh-Water Algae North 

 America. 32, 37. 1874. Dickie. On the Algae found during the Arctic 

 Expedition. Journ. Linn. Soc. Bot. 17: 8. 1880. Campbell. Plants of 

 the Detroit River. Bull. Torn Bot. Club. 13: 93. 1886. WoUe. Fresh- 

 Water Algae U. S. 283. pi. 197. f. 8. 1887. Bennett. Plants of Rhode 

 Island. 114. 1888. WoUe and Martindale. Algae. Britton's Catalogue of 

 Plants found in New Jersey. Geo!. Surv. N. J. 2: 606. 1889. Wittrock 

 and Nordstedt. Algae Aq. Dulc. Exsicc. no. 890. 1890. Anderson and 

 Kelsey. Common and Conspicuous Algae of Montana. Bull. Torr. Bot. 

 Club. 18: 144. 1891. Smith and Pound. Flora of the Sand Hill Region of 



