1891.] A.Barclay — Additional VvedlaeSie from Simla. 227 



AfiCIDIUM ORBICULARE, n. S. 

 On Clematis grata, Wall, 



,, orientalis, Linn. 



„ puberula, H. f. and T. 



Tills Aecidium was sent to me first by Mr. Lace and Dr. "Watt, and 

 subsequently I found it myself at Mattiain on Clematis grata. 



Aecidial patches were very numerous on stems, petioles, and leaves, 

 causing considerable hypertrophy of stems and petioles, especially on 

 Clematis grata. On leaves the peridia were markedly circinate in 

 arrangement, and all were hypophyllous. The peridial tubes were 

 long and cylindrical, and opened at the summit with an almost clean 

 margin, i. e., very minutely serrated. They measured about 0.75 m.m. 

 in length. The spores are bright orange red, densely beset with shallow 

 warts, round to oval or angular, 25 — 20 x 20 — 14 (Clematis grata) 21 — 

 16 X 16 — 15 (C. orientate) 22 — 19 x 19 — 15/x,. (0. puberula). 



The peridial cells were in all cases about 26 — 20/*. in diameter, four 

 to six-sided, with bright orange red matter in their centres, and spiny, 

 (PI, IV, fig, 6). 



This may possibly be the New Zealand Aec. otagense, Linds, ; but 

 the only description available to me is the very brief one by De-Toni, 

 from which it is impossible to decide, since no spore measurements are 

 given. The only other Aecidium described by De-Toni on Clematis is 

 Aec. Cleinatidis ; but the description of the peridium is unlike that I 

 have described. The Himalayan species is therefore, I think, distinct. 

 It is possible that this Aecidium is related to Pticcinia Wattiana, mihi 

 which occurs plentifully on Clematis Gauriana and G. grata ; but in the 

 absence of experimental proof it is impossible to determine. 



ISOLATED UBEDO FORMS. 



Ukedo Colebrookiae, n. s. 



On Oolebrodkia oppositifolia, Smith. 

 This fungus was collected by Dr. Watt near Suni in October. 

 The under surfaces of the lenves were almost uniformly orange red in 

 colour from innumerable orange red pustules. These pustules are 

 really distinct, but appear to be coalescing from their great numbers, 

 and from the hairy nature of the leaf surface, in which the spores get 

 entangled. Dr. Watt informed me that showers of red dust fell from 

 the leaves as he picked them. The spores are pale orange red, oval, 

 very spiny, measuring when just wetted 28 — 20 x 20 — 17 fi. These 

 spores were put into water some few days after collection, but they did 

 not germinate freely ; oiie or two did so, however, throwing out ong 

 simple sinuous tubes. 

 30 



