212 THE JOURNAL OF BOTANY 



in which water flows. I have observed these peculiarities in many 

 of the streams on the Quantock Hills in Somerset, and it would 

 seem that these two factors are and must be present wherever 

 Montia fontana grows. — L. H. Riley. 



Hypericum humifusum L. var. Liottardi Vill. — Two specimens 



in my herbarium, gathered by me at Darenth in Kent aud at West 

 Kirby in Cheshire respectively, agree closely with one another, but 

 differ very considerably from the usual form of H. humifusum. 

 Mr. Arthur Bennett kindly examined my plants, and wrote : — " The 

 W. Kirby and the Darenth specimens seem to be the var. Liottardi 

 Vill. described in Brebisson's Fl.de la Nor man die (ed. 3, 61) as 

 " Tige name pauciflore ; fleurs a 4 petales." These plants are so 

 remarkably characteristic that it seems desirable to record the fact 

 of their occurrence in these counties. — E. Drabble. 



Schistostega osmundacea. — At a recent meeting of the Liver- 

 pool Botanical Society, Mr. W. G. Travis exhibited specimens of 

 Schistostega osmundacea which he had discovered growing in fair 

 amount on sandstone rock. It is the more remarkable that it has 

 so long escaped observation in this neighbourhood, seeing that it 

 grows in fair quantity within the city boundary. — A. A. Dallman. 



Sisymbrium pannonicum in Cheshire (p. 163). — Dr. Drabble's 

 nota reminded me that I observed three plants of this species in 

 1903, on Hilbre Island at the mouth of the Dee, only a few miles 

 distant from that mentioned. I suppose that in both cases the 

 plant must have spread across the Mersey from the Lancashire 

 station, where it occurs in quantity. — A. A. Dallman. 



Potamogeton salignus A. Fryer. — Probably one of the least 

 likely places in which to look for the description of a new species 

 would be among the addenda to the botanical article in a general 

 county history. The Victoria County History of Devonshire (1906), 

 the botany of which 'we hope to notice when space will allow, 

 contains such a description, which we transcribe in order that it 

 may be brought to the knowledge of botanists, especially foreign 

 ones, who can hardly be expected to hunt through the history of 

 English counties on the chance that a new species may lurk in 

 some corner. The description runs: — "Potamogeton saliy?ius, 

 A. Fryer (probably a hybrid), differing from P. salicifolius Wolfg. by 

 the outermost vein of the leaves starting near the base of the mid- 

 rib and not from the base of the margin of the leaves " (i. 129). 



NOTICE OF BOOK. 



Sukkulente Euphorbien. Von Alwin Berger, 8vo., pp. viii., 135, 



with 33 figures. Stuttgart : Ulmer, 1906 ("1907"). Price 

 2.50 marks. 



This little volume is the first of a series of illustrated hand- 

 books on succulent plants which M. Berger proposes to issue. It 

 is nearly a hundred years since the publication of Haworth's 

 Synopsis Plantar am Succulentarum (1812), and the number of 



