184 MISS A. M. GELDART ON STRATIOTES ALOIDES, L. 
In Northants Slratiotes first recorded by Ger. Morton (1712) 
as Militaris aizoides from Peterboro’ in the fen ditches (G. C. 
Druce, FI. of Oxfordshire, 1886, and FI. of Northampton, 
p. 120) ; is probably now extinct in that County. Near 
Cambridge it is plentiful. It occurs in all divisions of Suffolk 
except Sudbury (Hind’s FI. p. 32 7), but in only one locality 
in Essex (Gibson’s FI.). Suffolk and Cambs form the 
Southern limit of native localities in Britain. 
H. C. Watson wrote in Comp. Cyb. Brit. (1870), “certainly 
wild in the Eastern provinces of England ” ; but later (Top. 
Bot., 2nd ed. 1883, p. 408) “ extremely difficult to separate 
the artificial from the natural stations for this plant, if any 
of them are absolutely native localities for it. I have seen 
it in the province of the Merse}' only, and distrusted all the 
few localities where observed. The province of Ouse seems 
the most deserving of trust.” 
In Scotland the female plant has been naturalized at 
Corstorphine, Duddingston Loch, Loch of Clunie, and Forfar 
Loch ; see Mr. R. S. Wishart’s account in Trans. Nat. Hist. 
Soc. of Glasgow, vol. vii. New Series, pt. i., 1902-3, p. 115. 
In Ireland it is very local and probably not indigenous. 
Possibly native in the N. of Ireland. Thoroughly at home 
in the lakes and ditches of Cavan and Fermanagh. (Cybele 
Hib. Moore and More. 1866.) 
GEOGRAPHICAL DISTRIBUTION. 
Essentially an inhabitant of still water not exceeding 
a few feet in depth, Stratiotes is found in the Pyschma River 
in W. Siberia, and in “ all countries of Europe except Greece ” 
(Hook. Stud. FI.) ; but I can find no record for Switzerland 
where the elevation is probably too great. According to 
Nolte, only the female plant is found between 68° and 55 0 
N. Lat. in Europe, this zone extending 2° further S. in Britain ; 
from 55 0 to 52 0 both sexes occur ; S. of 52 0 in W. Europe, only 
the male appears ; S. of 52 0 in E. Europe, the female plant is 
much rarer than the male. The most northern locality is 
Ofoten (68°) in Norway ; in Russian Lapland it occurs in the 
