108 BATRACHOSPERME^. 



Batrachospermum confusum ; it is nevertheless shorter, but as 

 thick. Its whorls are round and distinct ; they are more ap- 

 proximated the one to the other in the large stems, about 

 which they are sometimes even confused. Their colour is a 

 greenish yellow, pale, and livid. 



" This plant is found in ditches and in the most tranquil 

 fountains. I have even seen it in marshes fixed against 

 scirpes and stakes." 



5. BATRACHOSPERMUM MONILIFORME Hass. 



Char. Frond blackish brown. Whorls of the stems, distinct, 

 spherical, in the branches confused. 



Batrachospermum ludibundum (nwniliforme) Bory, in loc. 

 cit. xii. p. 322. pi. 30. fig. 1. Conf. fontana, nodosa, sper- 

 matis ranarum instar lubrica major et fusca, Dill. Muse, 

 p. 36. t. vii. fig. 42. Chara (gelatinosa frondibus gela- 

 tinosis Jilamentosis : Jilamentis capillaribus tenuissimis. 

 Verticillis approximatis moniliformibus, Roth. Cat. i. 125. 

 Batrachospermum (moniliforme) Jilis ramosis ; ramis al- 

 ternis pollentibus, 8fc., I {nth. Cat. Bot. iii. 160. Batra- 

 chospermum moniliforme Vauch. Conf. 112. t. 1. fig. 5. 

 et tab. ix. fig. 4. 



Hob. Plassey, near Limerick: W. II. Harvey. Upland 

 mountainous district 14 miles west of Aberdeen : Dr. 

 Dickie. Galway: M'Colla. Hill of Fare: Dr. Dickie. 



" This variety is the commonest of all. It is frequently 

 met with in fountains, in rapid rivers, and even in waters 

 almost stagnant ; it is sufficient that they are pure. It 

 has some resemblance to the variety B. confusum; but it 

 is more slender, and its bearing is more elegant. Its stems 

 are very much divided, and from one to three inches long ; 

 the globules which cover them are round, distinct, and appear 

 to hold each other only by their poles. They are, however, 

 confused in the last branches, which resemble little worms. 



" The colour of the B. moniliforme is deeper than that of 



