SOME BRITLSH BUST FrXGI 1G3 



Tlie characters of the species are as follows : — ■ 



Vredospores. Sori ainphigenous and on the petioles, scattered, 

 small, soon naked, pulverulent, rounded on leaf, oblong or linear on 

 petiole, cinnamon- brown ; spores subglobose to ellipsoid, echinulate, 

 cinnamon-brown, 22-24 X 15-22 /L/, epispore 2*8 yu thick with 3 germ 

 pores. Tel euioap ores, Sori similar but darker; spores ellipsoidal to 

 pyriform, hardly constricted, 21-25 X 14-18 ^, minutely warted with 

 a minute papilla at the tip, pedicels short deciduous. 



On cultivated Oiiobrychis safiva, Faversham, Kent. 



PucciNTA Hypochceridis Oud. Teleutospores have apparently 

 not been discovered in British specimens of this species up to the 

 present. They were found, however, along with uredospores, on a 

 plant of Hypochoeris radicata^ gathered in 191G near Epsom. They 

 agree closely with the description of the foreign specimens given by 

 Grove, and the minute punctations on the spore wall are clearly 

 visible. 



P. Crepidis Schrot. has been found on Crepis virens near Ballin- 

 ling, Perthshire, in July 1915. Only uredospores were present on the 

 specimen. This rare species has been previously recorded from Moray, 

 Noi*th Devon, and from Ireland. 



P. uligi)iOsa Juel. The secidial stage was found on Fctr/ia.'^.sia 

 pahtstris in Glen Sloy, Argyllshire, in June 1915. Up to the present 

 this has only been recorded from Glasgow and Aberdeen. The 

 uredospore and teleutospore stages on Carex Goodenovli have not 

 yet been discovered in Britain. 



P. major Dietel was found on the lower slopes of Ben Voirlich 

 (Loch Lomond) in June 1915. Only the iecidial stage was present. 

 This autcecious species on Crepis pxiludosa has only been previously 

 recorded in Scotland from Braemar. 



Erratum. — In Journ. Bot. 1915, 44, the measurements of the 

 teleutospores of I^uccinia Frost ii should read 5G-G2 X 34-38/^. 



REVIEWS. 



The Quantitative Method in Biology. By Julius MacLeod, Dr. 

 Nat Sc. Manchester University Press & Longmans, Green & 

 Co. 1919. Price 15*. 



We must confess that so far we have been in no way impressed 

 with the value of the application of mathematical methods to bio- 

 logical problems, nor has a study of this volume in any way caused 

 us to alter our opinion. The book is the result of labours which can 

 only be described as prodigious, but the results do not seem to be in 

 any way commensurate. Ko doubt it would be useful to have 

 "constants" instead of "terms" in botany — if we could cite a 

 certain figure instead of talking of a Itaf as broad or narrow. But 

 is it possible ? we greatly doubt it. The systematic botanist will 

 lind many points of interest scattered through these pages which we 

 should regret to be suspected of undervaluing. Far from it : there 

 are many careful and valuable observations to be discovered by the 



