ON THE FLORA OF MADAGASCAR. 537 



Postscript.— Siuce the preceding pages were printed, tlie 

 following description of a new species of Chara has been received 

 from Messrs. II. and J. Groves. 



NiTELLA Baront, H. Sf J. Groves, sp. nov. 



Habitus proxime iV". pseiuIo-JlaheUatce. Caulls *4 millim. cras- 

 sus. Eamuli verticillorum fertilium circa S, similes, 3-4 furcati; 

 radiis divisionis primsp plerumque 7, secundae 5-G, terti^e et 

 quarta? 4. Segmenta primaria ramulortim totium longitndinem 

 dimidiam ^equantes. Segmenta ultima bicellularia, cellula in- 

 ferlora *0o-'06 millim. crassa, superiora *1 millim. longa, '03 

 millim. crassa. Fruetus solitarii, in divisione secunda aut tertia 

 siti, *53 millim. longa, "4 millim. crassa, circa 9-striati, oospora 

 '31 millim. longa *23 millim. crassa, liris inconsi)icuis, corouula 

 brevi. Antheridia iu divisione secunda. 



Differs from JV. pseudo-Jlahdlata by the fruit and antlieridia 

 being separate, neither being produced at tlie first forldng, and 

 by the inconspicuous ridges of the oospore. — Baro7i 3420. 



4 



LINK. Jv;Un>\- BOTANY, VOL XXU. 2u 



