NUPHAE LUTEA. 
187 
i«g merely the common species of Potamogeton, with Lito^ 
rella lacustris^ and Myriophyllum spicatum ; but at the 
north and west parts, where it is deeper, there is abundance 
of Scirpus lacustris, Arundo phragmites^ and other large 
aquatics, in the open places, between the tufts of which 
grows the beautiful Nymph<za alba, so rare on the east 
side of Scotland, and so very common in the Hebrides and 
West Highlands. On the north side of the lake are some 
patches of the plant found by Mr Glennie, while on the 
west side is abundance of another and more remarkable 
variety. 
The two plants agree in possessing the following charac^ 
ters, which were noted from a considerable number of fresh 
specimens. 
Calyx. Perianthium pen taphyllum, magnum, coloratum, 
foliolis obovato-rotundatis, concavis, patentibus, 
CoiiOLLA. Polypetala, minor ; petalis patentissimis, cu^ 
neato-linearibus, erosis, dorso nectariferis. 
Stamina. Filamenta linearia, recurvata, quadruplici se- 
rie digesta, receptaculo inserta. Antherse adnatge. 
PiSTiLLUM. Germen ovatum. Stylus brevis crassus. 
Stigma peltatum, elliptico-rotun datum, radiatum. 
Pericarpium, Capsula corticosa, ovata, multilocularis, 
polysperma, (vix pulposa, hinc minime bacca vera). 
Semtna. Nitida . , 
A person falling upon the two plants, at a distance from 
each other, would be ready to describe them as distinct 
species. He might thus imagine that three species existed 
in Scotland, whose essential characters might be as follow : 
N. major, stigmate integerrimo elliptico. 
N. media, stigmate repando sub-elHptico. 
minor, stigmate dentato subrotundo. 
