114 Minnesota Algae 



Bridgeport, November 1894. (Holden). Pennsylvania. (Wolle). Indi- 

 ana. Edge of water-works reservoir, Bloomington. November 1906. (Brown). 

 Minnesota. Floating in great abundance in creeks and ditches. State Fish 

 Hatcheries, St. Paul. September 1894. (Tilden). Iowa. "In the trough 

 of a flowing well. It is found very commonly in the waters in this locality 

 that are laden with iron, the sheath becoming impregnated with this sub- 

 stance." (Buchanan). Nebraska. Floating in fragile, ochraceous masses. 

 (Saunders). 



221. Lyngbya ferruginea G. S. West. West Indian Freshwater Algae. Journ. 



of Bot. 42: 292. pi. 464. f. 20. 1904. De Toni. Syll. Algar. S: 283. 

 1907. 



Plate V. fig. 27-29. 



Plant mass rust-colored; filaments 1.8-2.4 m'c. in diameter; sheaths at 

 first thin, colorless, later becoming thicker and rust-colored; trichomes 

 .8-.9 mic. in diameter, not constricted at joints, continuous; apical cell 

 cylindrical and obtuse; calyptra none; cells 4-5 mic. in length; transverse 

 walls distinct, not granulated. 



West Indies. Forming a yellow-brown ferrugininous stratum. Roseau 

 Valley, Dominica. (Howard). 



222. Lyngbya lutea (Agardh) Gomont. Essai Class. Nostocacees homo- 



cystees. Morot. Journ. de Bot. 4: 354. 1890; Monogr. Oscill. 161. 



pi. 3. f. 12, 13. 1893. De Toni. Syll. Algar. 5: 275. 1907. 

 Maze and Schramm. Essai Class. Algues Guadeloupe. 18. 1870-1877. 

 (Ph. stragulum Crouan). Wolle. Fresh Water Algae. Bull. Torr. 

 Bot. Club. 6: 283. 1879. (Ph. juHanum Rab.) Farlow. Marine Algae 

 of New England. 35. 1881. (L. tenerrima Thur.). Pike. Check List 

 of Marine Algae. Bull. Torr. Bot. Club. 13: 105. 1886. Wolle. Fresh- 

 Water Algae. U. S. 301. pi. 202. f. 20, 21. 1887. (L. Juliana Menegh.). 

 Collins. Algae from Atlantic City, N. J. Bull. Torr. Bot. Club. 15: 310. 1888. 

 Martindale. Marine Algae of tlie New Jersey coast and Adjacent Waters of 

 Staten Island. Mem. Torr. Bot. Club, i: 91. 1889. Wolle and Martindale. 

 Algae. Britton's Catalogue of Plants found in New Jersey. Geol. Surv. N. J. 

 2: 608. 1889. Murray. Catalogue of the Marine Algae of the West Indian 

 Region. Journ. of Bot. 27: 261. 1889. Collins. Algae. Rand and Redfield's 

 Flora of Mount Desert Island, Maine. 248. 1894; Preliminary Lists of New 

 England Plants. — V. Marine Algae. Rhodora. 2: 42. 1900. Collins, Holden 

 and Setchell. Phyc. Bor.-Am. Fasc. 18. no. 8S4- 1901. West. West Indian 

 Freshwater Algae. Journ. of Bot. 42: 291. 1904. Borgesen and Jonsson. 

 The Distribution of the Marine Algae of the Arctic Sea and of the Northern- 

 most Part of the Atlantic. Botany of the Faeroes. Appendix. XXV. 1905. 

 Collins. Phycological Notes of the late Isaac Holden. — II. Rhodora. 7: 222. 



Plate V. fig. 30, 31. 



Plant mass somewhat gelatinous, leathery, yellowish brown or olive, 

 when drie'd often becoming dark violet; filaments coiled, flexible, densely 

 entangled; sheaths colorless, smooth, at first thin, later becoming thick 



