85 



188. Fruit-bearing surface even, rough, veined, or wrinkled. 



ADRICULARINI. 



Hymenium in the form of cylindrical or irregular tubes, appearing 

 on the under surface like dots, pores, or irregular, vertical folds. 



POLYPOREI. 



Hymenium in the form of spines, prickles, teeth, or warts, projectr 



ing downwards. HYDNEI. 

 Hymenium in vertical plates or gills, radiating outwards from a 



central stalk. Umbrella-like. AQARICINI. 



189. Parasitic on the leaves of Vaccinium, and forming a yellow or 

 red rust on the upper side of the leaf, and a white coat on the 

 under side. Genus Exobasidium. 



Rusts growing on and in the leaves of living plants. Each species 

 capable of appearing under different forms, and of producing 

 reproductive bodies of different kinds. Uredo spores or Summer 

 spores are formed singly on the branches of basids which 

 grow directly from threads, produced by the germination of Win- 

 ter spores, which are made up of two cells or more. ^Ecidium 

 spores are conidia formed in cups or receptacles on the surface of 

 green leaves, after the sprouting of the Summer spores. 



UREDINE.E. 



Brands parasitic within green leaves, producing spores and sporidia. 



USTIJ.AGINE.E. 



Parasitic in insects. Producing yeast-like cells which multiply in 

 the fluids of the host and finally form a mycelium. 



ENTOMOPHTHORE.E. 



Many of. the remaining orders include plants that are not indepen- 

 dent species, but forms or stages of other orders. But for con- 

 venience of reference they are here inserted as given by Cooke. 



190. Reproductive portion of the plant predominant. Spores borne 



at the end of short, inconspicuous threads, which are either naked 



or contained in a perithccium or peridium. Coniomycetes. 192 



Vegetative threads conspicuous, commonly free, or loosely associated, 



but sometimes compacted into a common stem. Hyphomycetes. 



Fertile threads free or loosely interlacing. 191 

 Fertile threads compacted together, sometimes cellular. Stem or 

 stroma compound. 



