172 Minnesota Algae 



Sheridan and Cherry Counties. Bot. Surv. Nebraska. 30. 1893. Saunders. 

 Protophyta-Phycophyta. Flora of Nebraska. 1.7. 1894. Nelson. The 



Cryptogams of Wyoming. Wyoming Experiment Station. Tenth Ann. Re- 

 port. 5. 1900. Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 9. no. 

 403. 1898. Trelease and Saunders. Plants of Yakutat Bay. Harriman 

 Alaska Expedition, no. 502. 1899. Collins. The Algae of Jamaica. Proc. 

 Am. Acad. Arts Sci. 37: 240. 1901. Saunders. The Algae. Harriman 



Alaska Expedition. Proc. Wash. Acad. Sci. 3. 397. 1901. Tilden. Ameri- 

 can Algae. Cent. V. no. 486. 1901; Collection of Algae from the Hawaiian 

 Islands. Hawaiian Almanac and Annual for 1902. 112. 1901; Cent. VI. no. 

 581. 1902; Algae Collecting in the Hawaiian Islands. Postelsia: The Year 

 Book of the Minnesota Seaside Station, i: 169. 1902. Setchell and Gard- 

 ner. Algae of Northwestern America. Univ. Calif. Pub. Bot. i: 190. 1903. 

 Collins. Phycological Notes of the late Isaac Holden. — II. Rhodora. 7: 236. 

 1905. Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 25. no. 1210. 

 1905. Lemmermann. Algenfl. Sandwich. -Inseln. Bot. Jahrb. 34: 622. 1905. 

 Brown. Algal Periodicity in Certain Ponds and Streams. Bull. Torr. Bot. 

 Club 35: 247. 1908. Buchanan. Notes on the Algae of Iowa. Proc. Iowa 

 Acad. Sci. 14: 11. igo8. Collins, Holden and Setchell. Phyc. Bor.-Am. 

 Fasc. 31. no. 1504. 1908. 



Plate VIII. fig. I. 



Plant mass gelatinous, firm, in the beginning spherical, afterwards 

 becoming flattened, finally spreading out into undulating, folded, fleshy 

 or membranaceous, entire or torn, often perforated sheets, leathery on the 

 surface, blue-green, olive or brown in colorj filaments flexuous, entangled; 

 sheaths usually brownish near the- surface of the mass, in the interior 

 more or less distinct, often colorless; trichomes 4.5-6 mic. in diameter; 

 cells depre'ssed spherical or barrel-shaped; heterocysts 7 mic. in diameter, 

 somewhat spli'erical, often up to three or five in number; gonidia not known. 



Arctic Regions. In several localities and in various stages. From sea 

 level up to 1000 feet. Prevoost Island; shores of Hayes Sound; Floeberg 

 Beach; Egerton Valley. (Dickie). On naked soil in boggy ground. Assist- 

 ance Bay, Lat. 75° 40' N. (Sutherland). Beechey Island. (Lyall). Fresh 

 water. Port Kennedy. (Walker). Alaska. Forming thin leathery thalli 

 of indefinite size and shape, on damp ground. Near Glacier Bay. (Saunders). 

 Hidden Glacier, Yakutat Bay. June 1899. (Trelease). Assuming various 

 shapes, from discoid thalli to flat expansions of considerable extent, on 

 soil or on rocks. St. Michael. (Setchell). Iliuliuk, Unalaska. (Setchell and 

 Lawson). Greenland. On stones in fresh water stream and pools of 

 fresh water. Disko Island. (Lyall). Canada. Various parts of the shores 

 of the Gulf, Cumberland Sound, Davis Strait. (Taylor). Massachu- 



setts. On steep wet rock near Winchester North Reservoir. June 1904. 

 (Collins). Rhode Island. Common. (Bennett). Connecticut. On lime- 

 stone. Road near Gaylordsville. October. (Holden). New Jersey. On 

 wet ground, common. (Austin). Dripping rocks. Palisades, Bergen. (Wolle). 

 Maryland. On a grassy bank in sandy s^oil. Loch Raven, Baltimore county. 

 July 1897. (Waters). Georgia. On moist ground among various plants. 

 Thomson, McDuffee County. August 1908. (Bartlett). Texas. On mud 



