228 МЕ. A. BARCLAY ON THE LIFE-HISTORY 
= 
by a halo of pale yellow, and the orange-yellow ecidia are borne on the lower, or 
concave, surface of the leaf, opposite the dark central part seen above. Тһе red colour 
of the pateh is due especially to discoloration in the palisade-celis, and the abnormal 
thickness to hypertrophy of the spongy tissue, the palisade-cells retaining their normal 
dimensions and characters. Тһе tissues in the areas invaded are very extensively . 
permeated by hyphee, and many cells are destroyed. While the thickness of the leaf- 
blade is normally about 0:144 mm., it is about 0:55 mm. in patches bearing ripe ecidia. 
A patch of ordinary size measured 1 em. in total diameter, the central reddish-brown 
part measuring 6 mm. in diameter. The patches are sometimes considerably larger, 
however, and more irregular in shape. The ecidia are tubular structures, very deeply 
sunk into the laminal tissue, measuring about 2 mm. in length, and therefore 
resembling in some degree the zecidium on Pyrus Pashia *. With very few exceptions 
the zecidia burst from the lower surface of the leaf. These patches on the leaves are 
often placed near the margin, and are usually between and not over the principal 
veins; but when a vein is involved it is considerably thickened. When the stem is 
attacked, which occurs but rarely, it is considerably swollen." 
I should here add that only the earlier peridia are long and tubular, 2. e. those produced 
before the very wet weather sets in, after this the peridia are always very short; I believe 
the difference is due purely to an effect of climate. Shrubs that I have inoculated with 
material from the same source in my garden outside bore both forms of peridia in their 
proper seasons. Mr. J. Н. Lace, of the Forest Department, sent me some specimens 
from the interior of the Himalayas, gathered in July, with long peridia, whilst in Simla 
at that time they were all short-tubed. But the former region is beyond the influence 
of = south-west monsoon, and is therefore dry in July, whilst in Simla it is excessively 
moist. 
Teleutosporie Stage.—With regard next to the general characters of the uredo and 
teleutospore stage of the fungus on Brachypodium sylvaticum and Piptatherum holci- 
2 Ms eh 54 Pm there are two points or particular interest. The teleuto- 
АГЫ Жж SE ЗЕ аге Жа black isolated points on ше. upper surface of the 
а ТЕ “лн дез a ed, i. e. not covered by the epidermis of the host; whilst 
На corel I ^g n shortly linear, on the lower blade-surface, and charac- 
о 4 : P т pu But though the epidermis covers the spore-bed, 
DX nisi din se A : ' Ж t through the covering skin, and thus the spore-bed 
doi dat die Jan d eld- Ars These marked differences induced me to suspect 
Saka RE. 2 a a distinct species, though. I provisionally coupled 
Ве fabu df ишег: Crue wm under the name Puccinia coronata, Corda. The 
Festuca throughout winter i i (on таа ^ ound frequently on Piptatherum and 
blades, long before R ode p5 {егей places, and in early spring on the newly-unfolded 
produced bs aE ESY ТЕ еме ишу leaves. These could not, therefore, have been 
; pores; and I suspected either that a continuous reproduction of 
* This fungus I subsequently described more fully in 
Я ‘Scientific Memoi ; i i 
India; Part v. 1890, under the name Gymnosporangium | 2708 2 
Cunninghamianum. 
