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УТ. On the му of Puccinia coronata, var. himalensis. 
By А. Barcus, M.B., F.L.S., Bengal Medical Service. 
(Plate LVI. figs. 1-13.) 
Read 16th April, 1891. 
INTRODUCTION. 
IN the first part of my * Descriptive List of the Simla Uredinee”* I described the 
ecidial stage of this fungus on Rhamnus dahuricus, Pall, and later, in the second 
part Т, the uredo and teleutosporie stages on Brachypodium sylvaticum, Beauv., and 
on Piptatherum holciforme, Roem. & Schult. In the latter communication I incorrectly 
named the last-mentioned host Chrysopogon ceruleus, Nees; and at the time of writing 
was not aware that Festuca gigantea, Vill. also harboured the same teleutospore. In the 
former paper I also noted the probable generic relationship between these; but at that 
time I had not had opportunities for establishing the connection, and, indeed, the few 
inoculation experiments I had made were without result. Since then, however, 1 have 
devoted more time and attention to its life-history, and have been able to confirm the 
suspected relationship. The discovery of this relationship was indeed to be expected 
with confidence; and the investigation would scarcely have been worth undertaking 
were it not that my first inoculations failed, and that there existed two macroscopically 
very distinct forms of teleutospore, though microscopically alike (РІ. LVI. figs. 2 and 3). 
These two considerations stimulated me to work at the life-history. My first failures at 
inoculation made me suspect that the Puccinia coronata Т found here might not run а 
parallel course with that at home; and I thought that, even if one form did, the other 
would certainly be different. 
Вод Stage.—The ecidium is not widely diffused, though it is fairly common іп 
certain localities. Ripe æcidia шау be found as early as the latter part of May; but 
they are much commoner in July, 4. e. in very moist weather. Individual shrubs may 
sometimes be seen largely attacked; but as a rule only a few insignificant leaf-patches 
are met with. Тһе leaf-blades are the most frequent sites of attack; but the small 
stems are also more or less frequently assailed. In my original description of this stage 
of the fungus { I noted also that the drupes were infested, and sometimes extensively 
so. I formerly described the fungus, as it is seen on the leaves of Rhamnus, thus :— 
* When the leaf is attacked the invaded areas are usually small, and generally only 
‚опе patch occurs on each leaf.” (But I would here add that occasionally a single leaf 
may bear numerous patches.) ‘These patches are dark reddish-brown above, surrounded 
_* Journal of the Asiatic Society of Bengal, vol. lvi. pt. ii. no. З (1887). 
+ Ibid, vol. lviii. pt. ii. no. 2 (1889). 
2 Loc. eit. 
SECOND SERIES.—BOTANY, VOL. HI. > 2K 
