44 Minnesota Algae 



(Buchanan). Nebraska. Ponds and sluggish water. Not uncommon. 

 (Saunders). California. In a small spring near San Pablo. September 



1902. (Gardner). Central America. Only one specimen noted. "Amatit- 

 lan in 85 ft. water, towed in about 75 to 65, February i, 1906, at middle 

 of upper part of lake." (Meek). Hawaii. Island of Hawaii. (Berggren). 



Var. fontinale Hansg. Phys. und. Algol. Mittheil IV. 98. 1890. De 

 Toni. Syll. Algar. 5: 106. 1907. 



Collins, Holden and Setchell. Phyc. Bor.-Am. Fasc. 24. no. 1156. 1904. 



Colonies 45 mic. in diameter, gelatinous, containing 8-64 cells; cells 

 2.5-3 tnic. in diameter, approximate, densely aggregated; cell contents 

 distinctly granular, pale blue-green. 



California. On sandy ground. Lake Merced, San Francisco. (Gardner). 



loi. Merismopedium convolutum Brebisson in Kuetzing. Spec. Algar. 472. 

 1849. De Toni. Syll. Algar. 5: 108. 1907. 



Wood. Contr. Hist. Fresh-Water Algae North America. 15. 1872. 

 WoUe. Fresh- Water Algae U. S. 326. pi. 210. f. 14. 1887. . Bennett. Plants 

 of Rhode Island. 115. 1888. Wolle and Martindale. Algae. Britton's 

 Catalogue of Plants found in New Jersey. Geol. Surv. N. J. 2: 611. 1889. 

 Harvey. The Fresh-Water Algae of Maine.— III. Bull. Torr. Bot. Club. 

 19: 124. 1892. Bessey. Additions to the reported Flora of Nebraska made 

 during 1893. Bot. Surv. Nebraska. 3: 5. 1894. Saunders. Protophyta- 

 Phycophyta. Flora of Nebraska. 17. 1894. Tilden. List of Fresh-Water 

 Algae collected in Minnesota during 1893. Minn. Bot. Studies, i: 31. 1894. 

 Riddle. Algae from Sandusky Bay. Ohio Nat. 3: 317. 1902. Collins, 

 Holden and Setchell. Phyc. Bor.-Am. Fasc. 24. no. 1154. 1904. Riddle. 

 Brush Lake Algae. Ohio Nat. 5: 268. 1905. Brown. Algal Periodicity in 

 Certain Ponds and Streams. Bull. Torr. Bot. Club. 35: 248. 1908. 



Plate II. fig. 36. 



Colonies 1-4 mm. in diameter (visible to the naked eye), composed of 

 very numerous cells, membranaceous, subfoliaceous, more or less convolute, 

 greenish, bluish or yellowish; cells 4-5 mic. in diameter, 4-8 mic. in length, 

 spherical or-« oblong; cell contents blue-green or yellowish. 



United States. Shallow pools, forming a distinct layer upon the muddy 

 bottom, or separating and then floating on the surface. (Wolle). Maine. 



Attached to spruce logs floating in the Penobscot River. Orono. October 

 1890. (Harvey). Rhode Island. Common. (Bennett). New Jersey. 



Frequent in ponds. (Wolle). Pennsylvania. "Making a distinct green 

 layer upon the mud many feet in extent." In a very shallow, quiet, but 

 fresh po.ol. Spring Mills, near Philadelphia. (Wood). Ohio. Brush 



Lake, Champaign County; Sandusky Bay (Riddle). Indiana. Paris Pond, 

 Bloomington. February 1907 (Brown). Minnesota. Peat-bog near Lake 

 Kilpatrick. July 1893. (Ballard). Nebraska. At the bottom of pools ^^^ 

 floating upon the surface. (Saunders). South Bend. (Bessey). Cali- 



fornia. Floating all through the water in such abundance as to give it a 

 bluish color. In Stone Lake. Golden Gate Park. San Francisco. August 



1903. (Gardner.) 



