52 



what spherical form with a hollow interior, measuring 15 c m or 

 more in length. 



Common in Tokyo in May ; in the Seven Isles of Izu where the 

 camellia is planted on an extensive scale for the purpose of getting a 

 kind of oil from its seeds, this fungus often makes a great damage to 

 the tree. 



II. Exobasidium Camellise var. gracilis (n. var.). 

 (Figs. 4-8.) 



jap. fWJJ'^^ftft^; * tf 



Hymenium as in the typical species, formed usually on the lower 

 surface, sometimes on hoth sides of the leaves, but the spores and 

 basidia are more slender and the overlying tissue thinner, consisting 

 of three or more layers of cells. Spores 4 to each basidium, oblong, 

 slightly curved, 14.5 fj. long, 2.5 — 5 ju broad. 



This species always attacks the leaf or the leaf-shoot of Thea 

 Sasanqua Nois. } but not the flower-bud. The diseased leaves become 

 fleshy and thick, increasing to two or more times their original size. 

 The overlying tissue when ruptured forms one or more membranaceous 

 pieces and usually remains attached to the margin of the leaf. Common 

 in Tokyo in May. 



III. Exobasidium japonicum (n. sp.). 



jap. s > \ f > « * tf + 9 ? #tf 



Swelling caused by the fungus, at first greenish and glossy, be- 

 coming reddish on the side exposed to the sunshine afterwards powdery- 

 white with hymenium, sometimes globular and formed on the under 

 surface of a leaf, sometimes irregular, a portion of a leaf, a whole 

 lamina, or all the leaves of a shoot becoming fleshy and deformed. 

 Hymenium subcuticular. Spores 4 — 5 to each basidium, mostly 4, 

 oblong-reniform, 14,5 /j, long, 4 // broad. 



This species resembles Exobasidium Rhododendri Cramer, 1 but the 



1 Saccardo, Sylloge Fungorum, Vol. VI, P. 664. 



