282 COLLEGE BOTANY 



exceptions) belong to the Ascomycetes. These two exceptions be- 

 long to the Basidiomycetes. In most cases the algae do not ap- 

 pear to be greatly injured by the fungi, but in some cases the 

 parasitism is very pronounced. The algae involved in this growth 

 are mostly Cyanophyceae and Protococcales. Some of the lichens 

 are injurious to the higher plants on which they grow. The so- 



FIG. 132. Smut. 



called reindeer moss is a lichen which makes a luxuriant growth 

 and is the most important food of the reindeer. 



The fungi imperfecti include a very large number of fmii>i 

 which are known only by their conidiospores. It is very probable 

 that many of these species have no method of reproduction other 

 than by conidia, but many other species have ascospores, and, 

 therefore, belong to the Ascomycetes. Some of them belong 

 to the Basidiomycetes. As soon as the life history of any species 

 is known it is given its. proper classification. Many of these 



