320 TKANSACTIOXS OF THE [Sess. lxxxiii 



inclined to think, from a study of his description, that it 

 ma}' be my P. Hennlnr/ii (Jour. Bot., xlviii, 151, 1910): 

 but I have been unable to find a specimen of his plant in 

 any herbarium. 



P. locoluxu-^, Hagst. (Himalayas). — I agree with the 

 author in referring Dr. Brandis' " No. 8333, 18G4," from 

 the HimalaA'as to a new species. My specimen has a 

 few leaves only, and ohtusifolin^ seemed the neai^est, 

 as he allows. 



P. lacunains. Hagst. (British N. America). — I have 

 specimens from Salt Lake, Anticuli, Quebec, J. Macoun, 

 which he gives as one of the stations for his nov. sp.. 

 and the references show it is the same ; but there must 

 be some error, as my specimens have five-veined leaves, 

 and the lacunae in the centre are only a little more than 

 is usual in P. Friexii. Are different plants distributed ? 

 If not, why cannot it be named young FriesH ? 



P. javanicus, Haskl. (Asia, Africa, Australia). — Here I 

 quite agree with the author in making this into four 

 species. In fact, has he gone far enough, as he himself 

 suggests at page 133 :' There are differences in Japanese, 

 Indian, and African specimens that eventually may prove 

 specific. 



P. hiterallH, Morong. — He refers this to P. pusilbixx 

 Vaseyii, Robbins, and I see no reason why such may not 

 be upheld, though some time ago I suggested another 

 combination. 



P. qui/itqueneri;is, Hagst. (Australia). — Only one station 

 is given for this, hence two more may be quoted. " Upper 

 Copmanhurst, J. L. Boormaii, 1909, New South Wales. A 

 fairly common Potaraogeton in the Upper Clarence in 

 fairly shallow water." Moreton Bay, Queensland, Bailey, 

 1882. 



P. Va^eyll, Robb. (United States). — "Spike bearing on 

 submerged part. Greenwood Lake, N.Y., 1892, T. Morong, 

 U.S.A." In the specimens from "Hemlock Lake, N.Y., 

 U.S.A,, 1882, Hill," Morong has mixed Va^eyii and lateralis, 

 Morong. In three specimens I have from ])r. Robbins 

 there is no sign of spikes from the lower branches. 



P. dimorjf/ius, Rafin., P. Spirilliis, Tuck. (North America). 

 — Gay, in Compt. Rend. Acad., xxxviii, 702 (1854), made a 



