(34 . THE BOTANICAL MAGAZINE. [Voi. xxvi. No. sos. 



On Andropogon Sorghum Brot. var. vulgaris Hack. (Jich- 

 ang, Hupel ; Sept. 24, 1908 and Peking ; Oct. 1910). 



Helminthosporium Ravenelii Berk, et Curt. vSacc , Syll. 

 IV. p. 412. 



On the inflorescence of Sporoholus indicus R. Br. (Shashi, 

 Hupei ; Oct. 7, 1908 and Sangteh, Hunan ; Oct. 1908). 



Helminthosporium Sapii sp. nov. 



Spots, on leaves, small, darkbrown, on underside deeper 

 colour than the other, scattered, irregular, often confluent 

 forming large irregular specks; conidiophores, amphigenous but 

 mostl^^ on underside, erect, simple, bundleform, 1-2 septate, 

 dark, 26-28 n long, 5 fx broad (Fig. 12) ; conidia, clubshaped, 

 curved, 5-9-septate, dark, 34-56// long, 7-9/^ broad (Fig. 15). 



On Sapiutn sehiierum Roxb. (Tauen-shen, Hunan ; Oct. 

 1908). 



When this fungus attacks a leafstalk and forms a black 

 spot on it, the leaf becomes yellowish and finally falls to the 

 ground ; I have seen a tree that has lost a larger part of the 

 leaves because of the fungus. It seems to me that the very use- 

 ful host plant that is commonly cultivated in South China, has 

 been greatly damaged by the fungus. This is no known fungus 

 of Dematiacese on the host plant, according to my researches, 

 therefore I have considered this to be a new species. 



Helminthosporium Sesami sp. nov. 



Spots, on leaves, small, roundish, greyish having a dark 

 brown margin, conidiophores, amphigenous, simple, solitary, 

 swelled at the base, septate, 150-250 fi long, 6-8 ^ broad, 

 dark ; conidia, long obclavate, roundish at the both ends, com- 

 monly curved, 5-9 septate, brown, 46-68 /^ long, 8-11 (j. broad, 

 sametimes constricted at the septum of the first cell (Fig. 14). 

 On Sesarnum indicum L. (Shashi, Hupei; Oct. 6, 1908). 

 As the only fungus of Dematiacese which is parasitic on the 

 host plant we have one Cercospora and no Helminthosporium. 

 therefore, I have considered the present species to be new and 

 that it may be named C. Sesami according to the name of the 

 genus of the host. 



Alternaria Brassicae (Berk.) Sacc. Sacc, Syll. IV. p. 



