36 



covered the surface of the water with a beautiful thick moss- 

 Hke carpet varying in tint from a bright green to a distinct red. 

 This Azolla is well figured and described in Britton and 

 Brown's Illus. Fl. of Northern U.S., Canada and Brit. 

 Possessions, Vol. 1, p. 35. — D. T. Playfair. Apparently the 

 first record of its naturalization in Europe. It is an annual 

 cryptogam, whose megaspores float at the time of fertilization 

 and are firmly attached to other floating matter by means of 

 the barbed hairs on the massula. There can be little doubt 

 that their adhesion to the water-lilies, mentioned by the con- 

 tributor as imported from Canada and grown in the same 

 pond, was the means of their introduction. — S. T. Dunn. 



Lychnothammis stelliger, Braun. Martham Broad, Norfolk, 

 E., abundant, July 27, 1900. — A. Bennett and C. E. Salmon. 



