75 



FAM. IV. CALLITHAMNEJS. 



4. TRENTEPHOLIA Ag. 



Char. Frond affixed, ramose, articulated. Cells in single 

 series. Fructification corymbose, involucrate, and cap- 

 sular. 



(( Except for its freshwater habitat this genus does not 

 differ from the preceding section of Callithamnion, which in 

 the ( Brit. Flora ' I ventured to unite to it. At Mrs. Griffith's 

 instance I now give up this point, but must still observe 

 that Cal. Daviesii and T. pulchella, when the latter is well- 

 coloured, are scarcely distinguishable under the microscope." 

 Harvey. 



1. TRENTEPOHLIA PULCHELLA Ag. 

 Plate VIII. Fig. 2. 



Char. Frond parasitic, tufted, blood-red, much branched. 

 Filaments equal, apices obtuse. Articulations four times 

 as long as broad. Capsules pedunculate, in clusters, and 

 ovoid. 



C. chalybea Koth, Cat. Bot. iii. p. 286. tab. 8. fig. 2. C. 

 chalybea Dillw. Brit. Conf. t. 91. Conf. corymbifera, 

 E. B. t. 1996. and t. 2585. ; Harvey in Hooker's Brit. 

 Flora, p. 382. ; Harvey in Manual, p. 118. 



Hob. On flints in Winterbourne Stream at Lewes, Sus- 

 sex : W. Borrer, Esq. On sandstones in a spring at 

 Ladsworth, near Midhurst, Sussex : Mr. Jenner. Clon- 

 mel : Dr. Allman. Hill of Fare, Aberdeenshire : Dr. 

 Dickie. Frequent in streams in Ireland : Mr. Moore. 



" Professor Mertens first discovered the present delicate 

 species in the neighbourhood of Bremen, and communicated 

 it to Dr. Roth, who has published it with a good figure in 

 the third volume of his ( Catalecta Botanica.' Mr. Borrer 



