220 ALGjE CHLOROSPERMEyE. [Lemania. 



branched. In «. rose-red, in &. dull bluish-grey. This closely resem- 

 bles the marine T. virgatula. 



Div. III. CHLOROSPERMETE. 



Plants growing either in the sea, in fresh water, on damp 

 ground, or in anomalous situations; filamentous, membrana- 

 ceous, or amorphous ; either hyaline or (owing to the presence 

 of an internal granular mass), of a grass green, very rarely 

 purple colour. Fructification : green or purple sporules, either 

 rilling the frond or collected into sporidia, rarely forming exter- 

 nal capsuhs. 



Tribe XIV. LEMANIE^E. 



Plants growing in fresh water, filamentous, inarticulate, of a 

 eartilagineo-coriaceous substance and cellular structure. Fronds 

 hollow, furnished at irregular distances with whorls of papilla, 

 or moniliform. Fructification : fasciadate, simple or dichoto- 

 mous, moniliform filaments, attache^, to the inner surface of the 

 tubular frond, and finally dissolved into elliptic sporules. 



57. Lemania. Bory. Lemania. 



Frond filiform, tubular, coriaceous, cellular, torulose. Fructi- 

 fication: hyaline sporules, aggregated into moniliform, simple 

 or branched penicellate filaments, attached to the inner face 

 of the tubular frond. — Name in honour of a French Alogolo- 

 gist, 31. Leman. 



1. L. fiuviatilis, Ag. Fiver Lemania. Filaments branched, 

 olive-green, torulose, attenuated ; intervals between the swell- 

 ings cylindrical, much longer than they are broad. Hook. — 

 Hook. Br. Fl. v. ii. p. 322.—Conf. fiuv. Dillw. t. 29. E. Bot. 

 t. 1763. 



Rocky beds of rivers, in subalpine districts. Common in the rivulets 

 about Killarnev, ixc. 



Tribe XV. BATRACHOSPERME/E. 



Plants growing in fresh water, filamentous, articulate, in- 

 vested, with gelatine. Fronds composed of aggregated, articidate, 

 longitudinal fibres, whorled at uncertain intervals with short, ho- 

 rizontal, moniliform ramuli. Fructification: dense globular 



