I 



1887.] in the Neighhourhood of Simla. ^7.3 



throwing out narrow tubes, which, though twisted a little (Fig. 14, PI. 

 XV.), never became spiral as in the case of M. Euphorhiae^ nor so long. 

 These secondary spores measure from 18 x 15/xto22 x 16ft and on 

 an average 203 x 15 /oi. They are double-contoured and contain large 

 granules in their protoplasm. 



16. — ^ciDiUM CoMPOsiTARUM, Martins. 

 Myriactis nepalensis, Less. 



I have never found this ^cidium actually in Simla, where the host 

 is common, but at Mashobra, a few miles beyond the Station, at about 

 the same elevation. It may be found there towards the end of August 

 and beginning of September. Only the lower leaves are affected, and 

 generally before the plant sends up its flowering stalk, though I found 

 one plant with three of its lower leaves affected while it was in full 

 flower. The patches are circular and usually single, but sometimes more, 

 on each leaf, and they are very large, measuring about 1*5 c. m. in 

 diameter. The upper surface is pale yellow with a dark discoloured 

 centre as the patch becomes older, while the lower surface is very 

 pale yellow and here the aecidia are borne in great numbers thickly 

 set together. With a field-lens it may be seen that the spermogonia 

 are borne on the upper surface quite on the margin of the patch and not 

 within it. 



The cBcidiospores are irregularly round or oval, pale yellow, and, 

 when just wetted, measure from 14 x 14 to 17 X 12 fx and on an 

 • average 16 x 15"2 fx. (Fig. 15, a., h., PI. XV.). The spores are given off 

 in rows as usual. The epispore is thin. 



The peridial cells measure about 34 x 16 /x to 42 x 20 /x and are 

 arranged in an imbricate manner (Fig. 15, c, d., PI. XV.). 



Remarks. — The ^cidium not occurring actually in Simla, so far as 

 I am aware, I have not been able to pay special attention to it. I 

 presume it may be included under jEcidium Gompositarum, Martins, 

 although the measurements I give of the secidiospores are smaller 

 than those given by Winter in the case of Puccinia Jiosculosorum, Alb. 

 & Schw., and Uromyces Junci, Desmaz. However, as I do not know of 

 any teleutospore belonging to this ^cidium, I cannot do better than 

 refer it provisionally to A. Gompositarum, as recommended by Winter. 



Goncluding Remarks. — This completes the list of secidium-bearing 

 tJredines I have hitherto been able to examine in Simla, with the excep- 

 tion of the five which occur in Coniferae, and which I hope to describe 

 in a future paper. Three of these (on Abies SmitJdana and Gedrus 

 Beodara) I have already described in this Journal.* The other two 

 occur on Finns longifolia and P. excelsa. 



* J. A. S. B. 1886, vol ly, pt. ii, pp 1—11, pis. i— iii ; pp. 140 143, pis. iii, iv ; 

 et pp. 223—226, pis. vi, vii, 

 48 



