1887.] in the NeighhourJiood of Simla. 369 



tubercles. Tlie moistened spore measures on an average 15*6 x 13'1 /x.. 

 The life-history of this secidium is completed on Garex setigera, Don. 

 The uredospores on this second host measure from 19'8 x 13*5 /x. to 

 19*2 X 12'8 fji. The teleutospores (puccinia) are 56 ft, long by 15 /a 

 broad on an average. The upper cell measures 24 to 20 /a in length 

 by 12 to 17 /u, in breadth, whilst the lower cell varies from 20 to 14 /m in 

 length and 12 to 14 /x in breadth. In germinating, each cell forms a 

 promycelium which divides at its end into four compartments each 

 forming a sporidium at the end of a slender sterigma. The sporidia 

 measure 12 x 8 /x. For further particulars I must refer to the paper 

 already alluded to. 



13. — ^ciDiUM Strobilanthis, Barclay. 



Strobilanthes Dalhousianns, Clarke. 



The ^cidium which occurs on this plant is probably the most 

 common and widely diffused in Simla. I have described its life-history 

 fully in a paper in " Scientific Memoirs by the Medical Officers of the 

 Army of India "*, to which I would refer those who desire further in- 

 formation, while here I will only note its main characters. The para- 

 site may be found abundantly during July and August attacking only 

 the leaf-blades and very rarely indeed the petiole. The leaves are 

 often found very extensively bespattered with circular discoloured 

 patches, 5^ellow or yellowish green above and rosy or purplish or yellow 

 below. The patches usually measure about 4 — 5 m.m. in diameter, but 

 sometimes more, and are usually slightly concave above. The sper- 

 mogonia are borne on the upper surface and maybe recognised as minute 

 points. The aecidia are borne on the lower surface. The invaded 

 areas are considerably thickened, the thickening being due mostly to 

 hypertrophy of the spongy cells and to a lesser extent to that of the 

 palisade-cells. The mycelial filaments are of the usual characters and 

 form here and there simple tubular haustoria. 



The peridium consists of a single layer of flattened angular cells 

 m.easuring on an average 16 "3 x 11 '6 fx. The oecidiospores are given 

 off in rows, as usual, without intermediate cells. They are irregularly 

 round pale orange-yellow and measure, when just moistened, 18 x 16 /a. 



The spermogonia measure about 100 /x. in depth by 94 /x in width. 

 They are formed both on the upper and on the lower surface of the leaf, 

 but more frequently on the upper. They have a tuft of paraphyses 

 protruding through their mouths about 80 — 90 ft. 



This fungus completes its cycle of development on Pollinia nuda, 



* " Scientific Memoirs by the Medical Officers of ihe Army of India," Part II. 

 Calcutta, 1887. 



