94 A. Barclay — A Descrijjtive List of the UredineaB [No. 2, 



2. Chrysomyxa Piceae, nov. sp. 



On Ficea Morinda, Link. 



I first found this parasite in June at Narkanda (40 miles from 

 Simla) where it is fairly, though by no means very, abundant ; but I 

 Lave since found it fairly common much nearer, namely, at Masbobra, 

 a suburb of Simla. In Simla itself I have never met witli it on the 

 comparatively few individuals of the host which are present. At 

 Mashobra I found numerous trees attacked with it in the middle of 

 May, and some very extensively. The upper sides of the needles bore 

 brilliant orange red convex beds, round or oval to oblong. Each needle 

 usually bore several such beds ; but varying from 2 or 3 to 16, mostly 

 in a single row. Sometimes, however, there was an imperfect parallel 

 row on the other side of the upper needle surface. I observed that in 

 most trees almost all the beds were on one particular side of the needles, 

 so that they could be much better seen from one side of the tree than 

 from the other. This was probably due to some light effect ? 



Thus the usual site of eruption is the upper half of the needle 

 surface ; but sometimes beds are extruded from the lower side also. In 

 the immediate vicinity of the beds the needles were very slightly paled 

 or yellowed, but very inconspicuously. These fruit bodies occur mostly 

 on the older needles, and by far the most frequently on two-year old 

 needles, and were never present on the youngest just evolved needles. 

 I never found any on the axis. The beds varied from about 0*6 m.m. 

 in diameter to 2*5 or 3 m.m. in length by 0"6 m.m. in breadth. In depth 

 (i. e. from the free end to the base on the subhypodermal tissue tliey 

 usually measured 0*44 m.m.). 



The mycelium ramifies among the chlorophyll containing cells be- 

 tween the hypoderma and the endothelial sheath, but appears never to 

 penetrate within the latter. The hyphae are on the whole sparingly 

 distributed, except at the bases of fruit bodies where they are very 

 abundant. They are easily seen in fresh sections as they contain orange 

 red oil globules, and measure 4/>t in diameter. The resin canals never 

 contain hyphae ; but these are sometimes seen in the air spaces below 

 stomata. 



The fruit body consists mainly of radiating long oval cells, borne 

 by much septated filaments forming a pseudo-parenchyma. These 

 long cells measure from 0*100 to 0'157 m.m. by 12 to 16/x, broad. 

 They may frequently be seen to contain a central well marked 

 nucleus, staining deeply with carmine. These cells are never forked 

 (fig. 1,P1. IV.) There are a few scattered cells beyond the outer ends of 

 the long cells, on the surface of the fruit body, but they do not appear to 



