86 A. Barclay — A Descriptive List of the Uredineoa [No. 2, 



piomycelial tube, measuring 4 to 6ix in diameter, which bears a spori- 

 dium 6/x. in diameter. The telentospores are long very narrow cells, 

 very densely packed together side by side (fig. 1, PI. II) ; so much so 

 that in section the spores are polygonal. Each spore is about 26fx long 

 and 6 to Sfx broad. The spores are never horizontally divided but are 

 sometimes obliquely divided. Fig. 4, PI. II represents a surface view of 

 portion of a spore bed. It will be seen how small they are in diameter. 



The spermogonia are large flat structures, very frequently contigu- 

 ous to a uredo pustule. They measure from 0'252 to 0'346 m.m. in 

 width, and 0'126 to 0*144 m.m. in depth, and their bases rest upon 

 subepidermal tissue (fig. 2, PI. II). They appear to have no tuft of 

 paraphyses protruding, at least I saw none in the numerous permanently 

 mounted preparations I made and examined. 



Remarks. — This is evidently distinct from M. Hypericorum (D. G.) 

 as both the uredo- and the teleutospore beds are large and extremely 

 conspicuous, whilst those of the European species are said to be very 

 inconspicuous and small. 



2. Melampsora Leptodermis, nov. sp. 

 On Le'ptodermis lanceolata, Wall. 



Early in August the leaves of this host discover small saffron 

 yellow uredo pustules on the lower surface, with pale yellow spots on 

 the upper surface opposite them. The leaves are generally extensively 

 bespattered with these pustules. 



The uredospores are given ofE in chains (fig. 6, PL II), and are 

 orange yellow (more yellow than orange), round, or slightly oval, beset 

 with prominent spines. The fresh spores examined in water measure 

 25 X 20/x,. I did not observe their germination : they refused to ger- 

 minate in water on the several occasions I examined them. There are 

 no paraphyses among the uredospores. 



At the same time some bright orange red, more or less waxy looking 

 beds may be seen interspersed among the uredo pustules, which are the 

 teleutospore heels. The uredo stage is quickly over, and towards the end 

 of August only teleutospore beds are found. These beds rest on the 

 subepidermal cells. They are formed below the epidermis, which they 

 gradually lift up and disintegrate. In transverse sections through 

 newly formed beds it is seen that they are somewhat elevated above the 

 general epidermis level. Such young beds measure about 30/>(. in total 

 depth, 18 of which is above the outer surface of the surrounding epi- 

 dermis. This elevation continues as the bed grows older, until at last 

 its base is on the level of the outer surface of the epidermis. 



