MiYABE AND KuDO : M .TERIAI.S KOR A FLORA Ol' HoKKAIDU. VII. 



175 



Senecio biilbiferus Maxim. Mel. Biol. IX. p. 295 ; Fr. et Sav. Kiuim. PI. Jap. 

 I. p. 251. 



NoM. J.\p. Tamabaki, Iwabuki. 



Hab. Hokkaido. Prov. Osliima : Yuaokawa Valley (F. C. Gicatrox ! Sept. 

 16, J916). 



DiSTKiB. Southern Hokkaido and Honshu. 



New to the Flora of Hokkaido. 



Mr. Greatrex found this plant only at one spot on the woodc I banlc, which 

 forms the east boundary of the Yunokawa Valley about four miles up from the 

 Yunokawa Village. 



97. Cirsium Greatrexii Miyabe et Kudo, sp. nov. 



Ratiix perennis repeits. Caulis elatns, S-io pedes alius, simplex, apice tarnen 

 leviter ramosits, distincte striatus, glaber. Folia omnia basi ad cauleni non deciir- 

 teiiiia; radicalia spathulato-oblanceolata, apice acuminata, basi longe attenuata, 

 28 cm longa, 8 cm lata, irre^ulariter et leviter pinnatifida, utrinque subglabra vel 

 subtus parce arachnoidea, margine spinulosa; serns aiignsiis vel ai>ato triaiigularl- 

 bjis, spiids erectis vel incHivis ; caulina inferiora petiolata, radicalia subconformia, 

 minora, 13-16 cm longa; superiora sessUia, oblongo-lanceolata. spinoso-serrata, 7-13 

 cm longa, 2.5-3.5 cm lata, utrinque subglabra, subtus pallidiora, margine spinulo- 

 sa. Inflorescentia corymbosa, bracteis foliaceis, lineari-lanceolatis. Capita' 13-20, 

 erecta, 2.5— 3 cm in diametro. Squamae ^«^iV arachnoideae vel glabi'atae, apice 

 spinosae, basi dila/atae, erecto-patentes ; extremae sublanceolatae, plerLimque 7-10 

 mm longae, 2 mm latae ; intimae subulatae, 13-15 mm longae, 3 mm l.itae. Corol- 

 la purpurea, liinbj ii-r^ mm longo, tubo filiforme circa 10 mm longo. Styli antheras 

 superantes. Pappi circa 16 mm longi, fulvi. 



NoM. Jap. O'lva-azami. (nov.) 



Hab. Hokkaido. Prov. Oshima : Hakokate (F. C. Greatrex! Aug. 29 and 

 Sept. 7, 14, 1916). 



DisTKiB. Endemic. 



This is a remarkable species which could not be placed in any known section 

 of the genus. The creeping rhizome and general appearance make it appear to 

 have a close relation to Cirsium arvense, but the characters of the involucral bracts 

 and flowers are totallv different from it. 



