E. M. CHATEE — MICROSCOPIC FUNGI. 



233 



two cells. The most important member of this group is thi; 

 Puccmia grammis (Fig. 1), which attacks the wheat and other 

 cereals, as well as various grasses. In its first stage it appears as a 

 rusty powder on the leaves and stalks, and seems to consist of 

 rounded yellow spores, but these are regarded now by many as a 

 previous condition of the more fully developed two-celled spores of 

 the Puccinia. In the same order we find some fungi with spores 

 divided into more than two cells, and a very pretty one is to be 

 met with on the leaves of the meadow sweet, Spircea Vlmaria, 

 in which the spores are divided into three cells. This fungus is 

 called Tni)liragmium Tllmarm. It is not very common, but I found 

 some of it a few years ago near Bushey Mill. 



hulhosum. 



If in the autumn we examine a blackberry bush, we shall 

 probably find some dark spots on the upper surface of some of the 

 leaves, and on turning over the leaves so marked, we shall see on 

 the under surface some little black specks looking very much like 

 small spots of soot, which, when placed beneath an inch power of 

 the microscope, are found to consist of tufts of little stalked bodies 

 closely packed together. If we place some of them in a drop of 

 spirit or water and view them as transparent objects, we find them 

 to be spores which are divided transversely into three or four cells, 

 and the stalks are found to be somewhat thickened below and to 

 contain a granular core. A very similar variety containing rather a 

 larger number of ceUs, and with a mucronate point, is found on 

 the leaves of rose trees. These fungi are called Aregma, and the 

 one on the bramble, Aregma hdhosum (Fig. 2). At the same time 

 we shall find among the tufts some orange-coloured spores, which 

 at one time were considered a distinct form and called Lecythea, 



VOL. I. — PT. IX. 18 



