HIRNEOLA 403 



on the foliage of Andromeda polifolia, in the United States, 

 to those produced by E. vaccinii (Wor.) on Vaccinium vitis- 

 idaea, and V. myrtillus in Europe. 



Exobasidium Peckii (Halst.) This species attacks the 

 flowers of Andromeda Mariana in the United States. The 

 bell-shaped corolla is much distorted, and often converted 

 into a polypetalous condition. The ovary also often becomes 

 elevated above the receptacle. 



Exobasidium japonicum (Shirai). This species forms galls 

 on Rhododendron indicum which are superficially indistin- 

 guishable from those caused by E. rhododrendi. The galls 

 either appear on the leaves, or the whole of a terminal bud 

 may be involved. 



It is considered by some as a distinct species, on account 

 of the difference of host, and difference in the size of the 

 spores, but it seems to be rather doubtful, as the host 

 argument is valueless, and in all known species the spores 

 vary much in size. 



Spores 1 4 '5 X4 \i. 



Chittenden, Journ. Roy. Hort. Soc, 34, p. 45 (1908). 



Exobasidium Faivcettii (Massee). This species forms 

 very large galls and curiously shaped malformations on 

 the leaves and buds of Lyonia jamaicensis in Jamaica, 

 where it is very common. Spores spindle-shaped 15-16 x 



4-4 "5 I 1 - 



The majority of species are parasitic on plants belonging 

 to the Ericaceae, but some of no economic importance 

 attack species of saxifrage, grasses, Symplocos, etc. 



HEMIBASIDIOMYCETES 



A small group until recently included in the Basidio- 

 mycetes, distinguished by the basidia having 2-4 transverse 

 septa, each cell of the basidium giving origin to a one-celled 

 spore. 



HIRNEOLA (Fries.) 



Substance between cartilaginous and gelatinous, soft when 

 moist, rigid when dry but reviving when moistened. Sporo- 

 phore ear-shaped, veined, externally velvety. Basidia rod- 

 shaped, transversely septate, each cell bearing one hyaline, 

 continuous spore. 



Substance thin, translucent. 



