ON THE WILD CHRYSANTHEMUM 

 OF NORTH JAPAN. 



IIV 



TOKUJIRO MaEKAWA. 



(With Plate I) 



m jii m 'X ßi5 



Prior to the pubhcation of the I'lora of Saghalicn by Mij'abc and 

 Miyakc'' in 191 5, the only known species of Chrysanthemum growing wild 

 in North Japan, including Saghalicn, Kurile Islands, Yczo and north-eastern 

 part of Honshiu was Chrysantheiimm arcticuni L. 



In the work above mentioned, Chrysanthenmni Gmelini (Ledeb.) Miyabe 

 and C hrysanthemuin Weyrichii IMiyabc et Miyake were added. For many 

 years I have noticed the fact, that the Chrysanthemums from different locali- 

 ties in Hokkaido and north-eastern part of Honshiu differ from one another 

 more or less, and also that their seedlings are very variable displaying at 

 t!ie same time conspicuous distinct characters peculiar to each type. By 

 careful observations on the living specimens of these plants both at their 

 native habitats and under their cultivated conditions in the Botanic Garden, 

 and also on the dried specimens in the Herbarium of the Hokkaido Imperial 

 Uni\'ersity, I ha\e reached, at. last, to the conclusion which I am going to 

 try to set forth in the present pajjer. 



As early as 1740, Gmelin'^ described and figured a Chrysanthemum 

 from Kamtschatka under the name " Pyrethruin foliis huge petiolatis, pal- 

 iitatis, supra dilatatis, vltimis trilobisy It has been, however, the source 



i) Flora of Saghalicn. 1915, p. 250-251. 

 2) (inicliii, I-'l. Silj., Vol. II, p. 203, t. 84. 



