. , -Mo- i 



292 CHARACE.E INDICE ORIENTALIS 



on the side of the leaf opposite to that on which the gall breaks fortli, 

 corresponding with the insertion of the stem. Almost every spécimen 

 is beset with a minute parasitic fungus, which appears to be undescribed. 

 It may be thus characterized : — 



Sphseronema epicecidium, n. s. peritheciis minutis innatis nigris ore 

 prominulis ; sporidiis variis plus minus obovatis minimis. 



Tab. X. B. Our plate shews (Fig. 1.) the gall of the natural size, 

 and a magnified view (Fig. 2) as it is infested with the parasite. 

 Fig. 3. the perithecia, as seen from above, springing from an obscure 

 stratum of flocci, which are more or less confused with ihe outer cells 

 of the gall, beneath which the larger cells of the subjacent tissue are 

 visible. Fig. 4. spores highly magnified. 



Charace^e Indi.e ORIENTALIS et insularum maris pacifici ; 

 or characters and observations on the Charace.e of the East Indian 

 Continent, Ceylon, Sunda Islands, Marions, and Sandwich Islands ; by 

 Dr. Alexander Braun. 



The East Indian Characeœ are far less peculiar than those of Aus- 

 tralia, the greater part of them being found also in other parts of the 

 world, although exhibiting différent varieties. It is remarkable that 

 several of the East Indian species agrée with those of South America 

 and the warmer parts of North America. In treating the single species 

 I shall specify thèse relations. In this enumeration of the East Indian 

 Characeœ, the herbarium of Sir W. Hooker has furnished me with the 

 richest materials ; but I regret not having found in it the species enu- 

 merated in Dr. Wallich's Catalogue. Other valuable additions were 

 furnished to me by Agardh, Meyen, Bellanger, Perrottet, &c. Some 

 doubts concerning the synonymy cannot yet be cleared up ; but I hope 

 that the communication of thèse remarks will give to others the oppor- 

 tunity of removing them. 



Genus I. NITELLA. 



Subgenus A. Nitella. 

 a, Nitella fur cata. 



d, homophyllce . 

 1 . N. acuminata, var. Bellangeri ; monoica, robustior, flexilis ; verti- 



cillis e foliis 6-8, sterilibua remotissimis c foliis elongatis, nonnisi 



