182 NAIADACES. 
inter spatiis concavis. Pistil. periantheo tubuloso apice spi- 
culigero includ. 
Has. in aquis stagnantibus. Serampore. 
The leaves appear to me to be the only prominent parts for 
Specific distinction, the teeth in this are distinctly different, 
the terminal fuscous cell being alone simple. The female 
presents no appreciable difference perhaps. The habit is 
distinct and the colour blackish green. 
The process of fecundation is pointed out by a fuscescent 
deliquescent substance adhering to the stigmata, but I see no 
definition of boyeau, although the pollen grains may be 
traced in the deliquescent looking mass, but the appearance 
is obscured by adhering amylaceous matter. 
The perianth is not constant. It appears to be a deciduous 
species. | 
2. Naias fucoides Grif. Pl. CCLI. Fig. I. 
Robusta carnosa fusca fragilis. 
Emersa, apicibus ramorum etc. exceptis qui submersi, dicho- 
toma. Internodiis longiusculis, articulos versus, dentatis. Foliis 
ternatis subverticillatis, planiusculis (vaginis simplicibus,) latis 
carnosis grosse dentatis, secus linea mesiam etiam dentigera 
(dent. opposit.) Fl. fæm. axillar. solitar. 1 in axilla uno 
tantum articulo cuidem ovarium oblongum, nudum. Stylo ro- 
busto longiusculo. Stigmata 2-3. Ovulum generis, 
In aquis semistagnant. Gurmab, Porta Bolan Affganisth. 
_ A remarkable species, appearing to be dicecious, yet all the 
ovaries are impregnated, it is much more robust than any 
other species I know, the leaves like those of the others are 
only pseudo verticillate, one produces a pistillum, the other 
vaginates the continuation of the axis, the third produces a 
branch. Between both conducting tissues, is spread a mucila- 
ginous film. which forms a tunic to the ovulum, adhering firm- 
ly to the lower conducting tissues ! ! 
The inner tegument is very fine and separates with the nu- 
