1887.] in the Neighbourhood of Simla. 363 



about 60 to 65 fx in length. The tissues of the leaf are not so greatly 

 hypertrophied in the spermogonial stage as they afterwards become, 

 the depth of the laminal tissues near a ripe spermogonium being 01 89 

 m.m. in one case. 



The peridium (Fig. 13, PI. XIII) consists of a single layer of angular 

 flattened cells measuring from 31 "5 or 378 ju, in length by 16 to 31 /x in 

 breadth, or on an average 33*6 x 2321 /x,, shortly after immersion in 

 water. It opens stellately. The cecidiospores are oval or round (Fig. 14, 

 PI. XIII.) reddish yellow bodies with a smooth epispore. The contents 

 are either homogeneous or granular, more usually the latter. When 

 just wetted, they measure about 25 /a in diameter, and the epispore is 

 about 1*5 ju, to 2 />t in thickness. They are given off serially as usual 

 from basidia, but there are intermediate cells between succeeding spores 

 (Fig. 15, PI. XIII.). 



Remarks. — It may not be out of place here to refer to a very fine 

 ^cidium on Thalictmtm minus, Linn., which I found on the 7th May 

 1884 at Urni, a village on the Hindustan- Thibet road about 126 miles 

 from Simla towards the " Interior." It is quite possible that this is 

 the same species as that which I have just described as found in Simla, 

 but it gives rise to very considerably greater distortions and hypertro- 

 phies in its host. The attacked plants were indeed extremely distorted : 

 sometimes a whole flower head exhibited a mass of small aecidial tubes 

 (Fig. 16, PL Xy.), and individual leaflets when largely invaded exhi- 

 bited the most curious forms (Fig. 17, PI. XY.). In this form, sometimes, 

 though not very frequently, the stalk also was affected. The secidio- 

 spores are orange-yellow, and measured, when dry, 19 X 16 /a on an 

 average, but, when well moistened, 22 x 18 /x. 



It is possible that both these forms are identical with, or varieties 

 of, jEcidium Thalictri Jlavi, D. C, the secidiospores of which are said 

 to measure 17 to 28 /x long and 14 to 20 //- broad. 



9. — ^ciDiUM Jasmini, nov. sp. 

 Jasminum humile, Linn. 

 An ^cidiu.m may be found on this plant during July and August, 

 but is decidedly uncommon. The parasite attacks both leaf and petiole, 

 bat more commonly the leaf blade, giving rise to an irregularly circular 

 patch, slightly paled above, greenish yellow and brownish red below. 

 These patches vary in size, but are usually about 8 m.m. to 1 c. m. in 

 diameter. The involved areas of the leaf are slightly thickened. The 

 secidia burst out exclusively from the under surface of the leaf, so far as 

 my observations extend. They contain brilliant orange-yellow spores, 

 the peridium, a short tubular structure, bursting at the summit in a 



