284 



A. Barclay — Descriptive List of tJie UrediuesB [No. 2, 



into tlie germ tube. The promycelium divides into four compartments, 

 but usually only the distal three bear sporidia, though occasionally all 

 four do so. Sterigmata are formed at the middle of the compartments, 

 excepting in the case of the terminal cell, where the sterigma is terminal. 

 The promycelium of the lower cells emerges from a point near the sep- 

 tum. The sporidia measure 10 ^ in diameter. 



2. Pttccinia TJRTiCiE, Barclay. 



on Tlrtica parviflora, Eoxb. 

 I have described this Puccinia elsewhere,* but will here briefly 

 recapitulate its characters. The leaves in antumn (October) often bear 

 numerous pustules on the under surface, varying from the size of an 

 ordinary pin's head to 3 mm. in diameter. These pustules are very 

 convex towards the under surface of the leaf with a corresponding 

 concavity above. The invaded ai-eaa are at first pale yellow both above 

 and below, but afterwards become brown below and orange yellow with 

 a pale green margin above. The pustules consist of aggregations of 

 minute circular prominent spore beds. The spores are firmly adherent, 

 brown, thickened at the apex, and vary greatly in size and shape (Fig. 9, 

 PI. SII). One of average size measures 40 jj. in total length (upper cell 

 18 /A and lower 22 /*) and 17 in greatest breadth. Double-headed spores 

 are not uncommon. They germinate immediately after ripening in water, 

 throwing out promycelia in 24 hours, the upper from the apex and the 

 lower from a point near the septum. The sporidia measure 12 x 8 /i. 

 No uredospores are ever formed so far as my observations extend. 

 This puccinia has no connection whatever with the life history of the 

 well known JEcidium Urticm, Schum. 



3. Puccinia SAxiFEAGa: ciliat^;, nov. sp. 



on Baxifraga Ugulata, Wal., var. ciliata, Koyle. 

 This, so far as I am aware, is an uncommon parasite, and I have found 

 it only in two localities. In one place, I found it in July, in the other, as 

 early as the end of February. An attacked leaf displays a large number 

 of minute dark chesnut-brown pustules about the size of an ordinary 

 pin's head, always on the lower surface, each surrounded by a conspicuous 

 yellow zone (Fig. 7, PI. XIII). The unburst pustules are of a pale rosy 

 yellow coloitr. They are very irregularly scattered over the surface of the 

 leaf, and their positions beneath are indicated above by red spots. The 

 spore beds are well raised and hemispherical. The spores are light brown 



* JHcidium Urticoe, Sohnm., var. Himalayense, ' Scientific Memoii's by Medical 

 Officers of the Army of India ' 1887, Part II, p. 38. 



