[+08101 
УП. On the Life Hatopf f Puccinia Jasmini-Chrysopogonis, nov. sp. 
Ву A. Bancray, M.B., F.L.S., Bengal Medical Service. 
(Plate LVI. figs. 14-23.) 
Read 16th April, 1891. 
IN a recent paper on the life-history of an xcidium on Jasminum grandiflorum I 
alluded to the existence of an ecidium on another species of Jasmine, namely J. 
humile, L., and drew attention to the remarkable attitude of our three Jasmines towards 
the Uredinee. Whilst J. grandiflorum, L., alone of these will harbour Uromyces Cun- 
ninghamianus, J. humile only will bear the æcidium I am about to describe, and J. 
officinale, L.,.will not suffer itself to be attacked by either. And again, while the ecidium 
on J. grandiflorum is an auteecious species, that on J. humile is hetercecious, the other 
host being a grass, Chrysopogon Gryllus, L. The parasite on J. grandiflorum exhibited 
several very anomalous peculiarities, but the only feature of peculiar interest in the 
species I am about to describe is the extraordinary abundance and wide distribution of 
the teleutosporie stage as compared with the comparative scarcity of the secidial stage. 
This disproportion in the distribution of the two stages I noted in my Descriptive List 
of the Simla Uredinez *, long before I knew that they were related to one another. 
And, indeed, this peculiarity misled me in my long-continued attempt to discover the 
life-history of the secidium, for so abundantly distributed a teleutospore I felt sure 
must be related to one of our more abundant ecidia.’ I was at last led to suspect the 
relationship, with, however, little hope that the suspicion was well founded, by observing 
last autumn that the grass was largely attacked close to a bush of Jasmine which I had 
previously noticed had been unusually largely attacked by the æcidium. Before, however, 
going on to a description of the experiments I made to establish the relationship I will 
shortly describe the systematie characters of the fungus. 
ACIDIAL STAGE. 
This stage of the parasite makes its appearance at the commencement of July, shortly 
after the monsoon rains have set in, i.e. during very moist weather, and continues to be 
met with throughout July and August. Тһе secidium is very conspicuous (Pl. LVI. 
fig. 14), the mycelium giving rise to large circular or irregularly circular patches on the 
leaf-blades, usually about 8 millim. to 1 centim. in diameter, reddish brown with a 
halo of yellow above, and the same below before the ecidia have made their appearance, : 
* eidium Jasmini, in Journal of Asiatic Society of Bengal, vol. lvi. pt. ii. no. 3, 1887, p. 366 ; and Puceinia 
Chrysopogi, in the same Journal, vol. lviii. pt. ii. no. 2, 1889, p. 247. ДАЙ 
LZ 
