i86 
MILDEWS, RUSTS AND SMUTS 
leaves. The teleutospores in several species have the wall 
covered with a network of raised ridges. 
ENTYLOMA 
Differing from the majority of genera in forming rather 
pale coloured spots or patches on leaves. Some species 
have a whitish, very delicate, mould-like conidial form of 
reproduction, which precedes the development of the sori 
of teleutospores. 
MELANOTAENIUM 
Our only species is parasitic on species of Galium ; 
plants attacked are dwarfed and blackened by the parasite. 
ENTORRHIZA 
The only known British species forms small swellings 
on the roots of species of Juncus. 
SPHACELOTHECA 
The one species produces its spores in the ovary of 
species of Polygonum. 
DOASSANSIA 
Forming small pustules on leaves of aquatic plants, 
Alisma, Comarum, etc. Readily recognised on microscopic 
examination, by the wall of palisade-like hyphal cells 
surrounding the sorus. 
TUBURCINIA 
Forming conspicuous, swollen, black pustules on stem 
and leaves of Trientalis europaea. A delicate, white, 
conidial form, forms patches on the under surface of the 
leaves, before the teleutospores are developed. 
THECAPHORA 
Distinguished by the spore-balls being of a brownish colour. 
One species grows in the ovary of species of Convolvulus, 
the other in the inflorescence of Carduus heterophyllus. 
CINTRACTIA 
Superficially resembling Ustilago in habit, but the spores 
adhere in groups and form spore-balls. The only species 
in this country is an introduced one. 
SOROSPORIUM 
Spore-balls pale reddish-brown, produced in the ovary 
and anthers. 
