1887.] ' in the Neighhourhood of Simla. 367 



Simla ^clclium to be of the nature of a sporidium, and then the only 

 difference that exists between them is that, whilst in Endophyllnm 

 four deciduous sporidia are formed on sterigmata, in the Simla parasite 

 only one non-deciduous one is produced directly at the end of the pro- 

 mycelium instead of at the end of a sterigma. But these diiferences 

 are still great enough, I think, to entitle the species to be regarded as 

 the type of a very distinct group of the ^cidiomycetes having its 

 closest affinities with the genus Endophyllum. The only other ^ci- 

 dium with which I am acquainted that would find a place in this new 

 group or genus would be that which I have described further on on 

 Andrachne cordifolia. I would define the characters of this new 

 (provisional) genus as follows : — 



Mono SPORIDIUM, gen. nov. 

 Spore layer very like, or identically the same as, that of the ^ci- 

 dia of Puccinia and Uromyces. The spores are abstricted in rows, but 

 behave in germination somewhat like teleutospores in that the germ 

 tube (promycelium ?) produces a secondary non-deciduous spore 

 (sporidium ?) directly at its extremity without the intervention of a 

 sterigma. 



11. — Puccinia Graminis, Pers. 



Berberis aristata, D.C. 

 During August, the Barberry may frequently be found attacked by 

 an eecidium-bearing parasite. Only the leaves are attacked, and, on 

 them, circular patches are formed, almost crimson-red on the upper 

 surface with a narrow halo of pale yellow-green (Fig. 3, PI. XY) and 

 pale rosy red below with pale yellow 86cidia thickly strewn over it. 

 A single leaf may contain from one to six or eight such patches. A 

 medium-sized patch measures from 4 to 5 m.m, in diameter (including 

 the halo of yellow), but sometimes the patches exceed 1 c. m. in 

 diameter. With a field lens, numerous spermogonia may be seen on the 

 upper red surface, but also a few in the centre of the lower surface, 

 around which the ascidia are arranged. 



The cecidiospores, when just moistened, measure from 22 x 17 /a 

 to 20 X 18 /x, or, on an average, 20-8 x 17-8 fx. The contents are bright 

 orange-yellow, and usually on one side of the spore a colourless space is 

 left filled apparently with colourless protoplasm (Fig. 8, PI. XIY) giving 

 a characteristic appearance to the spores. The peridial cells are gen- 

 erally square in outline and measure about 20 X 18 /x (see Fig. 9, PI. 

 XIV.). They are thick- walled, thicker on one side (Fig. 10, PL XIY.), 

 and contain orange-yellow matter in their centres. 



When invaded by mycelium, the leaf is generally considerably 



