Myxophyceae 231 



T. pulchra Kg., T. f 1 a c c i d a Kg.). Collins. Algae of Middlesex 

 County. 13. 1888. Parvey. The Fresh-Water Algae of Maine.— I. Bull. 

 Torr. Bot. Club. 15: 161. 1888. WoUe and Martindale. Algae. Britton's 

 Catalogue of Plants found in New Jersey. Geol. Surv. N. J. 2: 605. 1889. 

 Anderson and Kelsey. Common and Conspicuous Algae of Montana. Bull. 

 Torr. Bot. Club. 18: 144. 1891. Johnson. Fresh Water Algae. North- 

 western University. Report Dept. Nat. Hist. 22. 1891. Collins, Holden 

 and Setchell. Phyc. Bor.-Am. Fasc. 5. no. 209. 1896; Fasc. 20. no. 956. 190:.;. 

 Setchell and Gardner. Algae of Northwestern America. Univ. Calif. Pub. 

 Bot. 1 : 195. 1903. Collins. Phycological Notes of the late Isaac Holden. — 

 II. Rhodora. 7: 237. 1905. 



Plate XIV. fig. I. 



Plant mass caespitose-floccose, rarely extended in a cushion-like layer, 

 blue-green, becoming brownish with age; filaments 9-12.5 mic. in diameter, 

 '^ cm. in height, repeatedly branched; false branches erect, spreading, flex- 

 uously curved, sheaths membranaceous, thin, usually inflated at the base 

 of the branches, colorless or yellowish; trichomes about 10 mic. in diame- 

 ter, cylindrical; cells equal to or longer than the diameter; heterocysts 

 one to four, often colorless; cell contents blue-green. 



Alaska. Forming blackish brown felt-like mats in shallow, running 

 water. Unalaska. June 1899; forming dark brown, felt-like layers on rocks 

 or on the bottom of shallow, fresh water or dried streams, Iliuliuk. (Setch- 

 ell and Lawson). Maine. Old well. College Farm, near Orono. 1887. 

 (Harvey). Massachusetts. Spot Pond, Stoneham; floating in clay pits, 

 Medford, April 1893. (Collins). Connecticut. Lime Rock. (Adam). 



Mostly on aquatic mosses in summer and autumn, in quiet water. Pequon- 

 nock River, Bridgeport. November 1890; Lake Saltonstall, near New 

 Haven, September to December. (Holden). New Jersey. Clusters torn 

 from attachment by storm. Budd's Lake. August 1881. (WoUe). Penn- 

 sylvania. Forming little bright green balls, adherent to aquatic plants in 

 an aquarium. Philadelphia. (Wood). In ponds. (WoUe). Indiana. In 

 shallow ponds. Edgemoor, Lake County. August 1890. (Johnson). Mon- 

 tana. On dripping rocks and on wet wood-work of dams, flumes, etc., in 

 springs and streams. July to October. (Anderson and Kelsey). Wash- 

 ington. Near Seattle. (Kincaid). West Indies. (Maze). 



Var. hawaiiensis Nordstedt. De Algis Aquae Dulcis et de Characeis ex 

 Insulis Sandvicensibus a Sv. Berggren 1875 reportatis. 6. 1878. (T. m u s c i- 

 cola). De Toni. 1. c. 545. 



Lemmermann. Algenfl. Sandwich.-Inseln. Bot. Jahrb. 34: 625. 1905. 



Filaments 9-14 mic. in diameter; trichomes 6-8 mic. in diameter; cells 

 4-7 mic. in length; heterocysts 9 mic. in diameter, 10-15 mic in length. 



Hawaii. Adhering to leaves in stagnant water. Mauna Kea, Hawaii. 

 (Berggren). 



428. Tolypothrix distorta (Hofman-Bang) Kuetzing. Phyc. Gen. 228. 1843. 

 Bornet and Flahault. Revis. des Nostoc. Ann. Sci. Nat. Bot. VII. 

 S: 119. 1887. De Toni. Syll. Algar. 5: 54i- I907- 

 Wood. Contr. Hist. Fresh-Water Algae North America. 65. 1872. 



