106 MICROSCOPIC FUNGI. 



the discovery of three specimens of a large Boletus 

 (B. cyanescens),'^ not found, to our knowledge, since 

 the days of Sibthorpe, was farther enriched by a 

 species of Trichohasis, new to Britain, and apparently 

 uncommon on the Continent. This rust was found 

 on the leaves of the '^ grass of Parnassus " {Par- 

 nassia paliistris) on a narrow strip of marsh near 

 Irstead church. It was sought in vain elsewhere. 

 The leaves were scarcely changed in appearance^ 

 except by the presence of the pustules. There were 

 no discoloured spots, but the pustules appeared 

 sometimes plentifully, more often scattered, on both 

 surfaces of the leaves : they were small, of a bright 

 brown, with oval spores ; the latter were, in their 

 early stages, shortly stalked. We have called this 

 i^pecies Tricliohasis Parnassioe. It is probably the 

 same as published by Westendorp in his '' Herbier 

 Cryptogamique Belge^^as Uredo Parnassice; at any 

 rate, such was the opinion of the late Mons» 

 Westendorp himself. It is certainly a TrichohasiSj 

 and not an Uredo, according to the present limita- 

 tion of the latter genus. 



Although the evidence against the retention of 

 the species of Lecythea (as the genus is named) 

 amongst Fungi as true species, on the ground of 



* At the time, these were believed to be the true Boletus 

 cyayiescens, but, since then, specimens of undoubted B. cyancscens 

 have been met with in Britain, and ours are considered a some- 

 what unusual form of a rather common species. 



