THE BOTANICAL MAGAZINE. 



Vol. X, No. 113. 



PA RT II. 



Descriptions of Some New Japanese 

 Species of Exobasidium. 



By 

 M. Shirai. 



With PI. IV. 



Of the four new species and one new variety of Exobasidium which 

 I am now going to describe, the two species and one variety which 

 are found on Thea {Camellia) japonica Nois., Thea {Camellia) Sasanqua 

 Nois ty and Rhododendron indicum Svj. are common in Tokyo and other 

 districts of similar climate ; while the remaining two species are com- 

 paratively rare, being found on rhododendrons in the alpine regions 

 of Central japan. 



I. Exobasidium Camellise (n. sp.). (Figs. 1—3.) 



jap. ^7* */>=£■?- tfif^/'tftf 



Hymenium thick and white, forming a continuous layer all over 

 the surface of the deformed organs ; at first covered by a thick layer of 

 subepidermal tissue, composed of ten or more layers of cells, which it 

 ruptures and breaks to a number of small pieces. Spores 4 to each 

 basidium, oblong-obovate, 14.5 — 17. p long, 7 p. broad. 



This species always attacks the flower-buds of Thea {Camellia) 

 japonica Nois, causing the hypertrophy and deformation of their parts, 

 Very often the whole flower is reduced to an irregular mass of some- 



