2i8 Minnesota Algae 



Calif. Pub. Bot. i : 195. 1903. Lemmermann. Algenfl. Sandwich.-Inseln. 

 Bot. Jahrb. 34: 625. 1905. 



Plate XII. fig. S. 



Plant mass 2-3 mm. in height, cushion-shaped, bluish-green or brown- 

 ish; filaments 9-15 mic. in diameter, tortuous, entangled; sheaths gelatinous, 

 below colorless, pellucid, in upper portions yellowish; trichomes 5-7 mic. 

 in diameter; cells somewhat quadrate, scarcely distinct; heterocysts some- 

 what quadrate or longer than the diameter, colorless; cell contents densely 

 granular, blue-green or yellowish. 



Alaska. On rocks moistened by spray from a waterfall. Near Juneau. 

 (Saunders). Canada. Shaded rocks. Niagara. (Wolle). Florida. Anas- 

 tatia Island, St. Augustine. (Wolle). Hawaii. (Schauinsland). 



400. Scytonema javanicum (Kuetzing) Bornet in Bornet and Flahault. 



Notes Algologiques. 148, 1880. Bornet and Flahault. Revis. des 



Nostoc. Ann. Sci. Nat. Bot. VII. 5: 1887. De Toni. Syll. Algar. 



S: 506. 1907. 



West and West. On some Freshwater Algae from the West Indies. 



Journ. Linn. Soc. Bot. 30: 269. pi. 14. f. 12-15. 1895. Setchell. Notes on 



some Cyanophyceae of New England. Bull. Torr. Bot. Club. 22: 428. 1895. 



Collins. The Algae of Jamaica. Proc. Am. Acad. Arts Sci. 37: 241. 1901. 



Plate XII. fig. 6. 



Plant mass cushion-shaped, 2-4 mm. in thickness, deep blue-green or 

 reddish; filaments 12-15 mic. in diameter, coalesced in vertical fascicles; 

 false branches long, flexuous, aggregated; sheaths firm, thin, colorless, be- 

 coming yellowish; trichomes 9-12 mic. in diameter; cells compressed or 

 quadrate; heterocysts somewhat quadrate; cell contents green becoming 

 brown or violet. 



Massachusetts. Growing on trunks of trees in Middlesex Fells, Mel- 

 rose. (Setchell). West Indies. On lime trees. Shanford Estate; Anguilla; 

 on walls, Roseau, Dominica, November, December 1892. (Elliott). On 

 flower pot in garden. Castleton, Jamaica. Ai^ril 1893. (Humphrey). 



Var. hawaiiense Lemmermann. Algenfl. Sandwich-Inseln. Bot. Jahrb. 

 34: 624. pi. 7. f. 6-8. 1905. De Toni. 1. c. 507. 



Plate XII. fig. 7. 



Plant mass cushion-shaped, dark blue-green; filaments 9.5-11 mic. in 

 diameter, coalesced into vertical fascicles; sheaths firm, thin, always color- 

 less; trichomes 5.5-8 mic. in diameter; cells 5.5-14 mic. in length, cylindrical, 

 sometimes quadrate (younger cells compressed) ; heterocysts 7-9.5 mic. in 

 diafneter, 9.5-14 mic. in length, usually cylindrical, rarely somewhat quad- 

 rate, sometimes yellowish; cell contents homogeneous, pale blue-green, the 

 cells in younger branches being filled with reddish bodies (gas vacuoles). 



Hawaii. Among mosses. Crater of Kilauea, Hawaii. (Schauinsland). 



401. Scytonema ocellatum Lyngbye. Hydrophytologia Danica. 97. pi. 28 A. 



