MiYABE AND KUDO : M \TERIALS FOR A FlORA OF HOKKAIDO. VII. j yn 



Senecio bulbiferiis Maxim. Mel. Biol. IX. p. 295 ; Fr. et Sav. Enum. PI. Jap. 

 I. p. 251. 



NoM. Jap. Tainabuki, Izvabiiki. 



Hab. Hokkaido. Prov. Oshirna : Yunokawa Valley (F. C. Greatrex ! Sept. 

 16, 1916). 



DiSTRiB. Southern Hokkaido and Honshu. 



New to the Flora of Hokkaido. 



Mr. Greatrex found this plant only at one spot on the wooded bank', 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. 



Radix perennis repeiis. Caulis elatus, 8-10 pedes alius, simplex, apice tatnen 

 leviter ramosiis, distincte striatus, glaber. Folia omnia basi ad caulem non deciir- 

 teniia', radicalia spathulato-oblanceolata, apice acuminata, basi longe attenuata, 

 28 cm longa, 8 cm lata, irregulariter et leviter pinnatifida, utrinque subglabra vel 

 subtus parce arachnoidea, margine spinulosa; serris angustis vel ovato triangulari- 

 bus, spinis eredis vel inciirvis ; caulina inferiora petiolata, radicalia subconformia, 

 minora, 13-16 cm longa; superiora sessdia, 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. '^(\y\zxn2£. parce arachnoideae vel glabfaiae, apice 

 spinosae, basi dilatatae, erecto-patentes ; extremae sublanceolaiae, plerumque 7-10 

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

 la purpurea, liinbj ii-i^ mm lougo, tubo piliforme circa lo mm longo. Styli antheras 

 superantes. Pappi circa 16 mm longi, fulvi. 



NoM. Jap. Oi'i.va-azami. (nov.) 



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

 Sept. 7, 14, 19 16). 



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 totally different from it. 



