1890.] occurring in the NeiyJihourhuod of Simla. 105 



and discover brilliant orange red spores. The aecidio-spores are round 

 or oval, beset densely with shallow tubercles or warts, and measure 

 when fresh 25/x, in diameter to 26 x 24/a. 



7. Aecidium infrequens, nov. sp. 



On Geranium {nipalensis, Sweet ?) 



This is also a very rare Aecidium. I have only once found it in 

 July, 1886. The aecidial patches in the only specimen I ever saw were 

 very numerous on the leaves, each division of the five lobed leaf bearing 

 from one to six patches. The patches were about /^ inch in diameter. 

 The peridia were entirely hypophyllous, and burst stellately, showing 

 orange red aecidiospores within. The under surfaces of the leaf patches 

 were yellow, and the upper surfaces greenish yellow. After the aecidio- 

 spores have fallen out of the peridia the latter become deep brown, and 

 then look like teleutospore beds. 



The aecidiospores are round, or angular when dry, of a pale 

 yellowish colour, and with very thin walls. The spores become de- 

 tached in rows of three or more. The fresh spores varied in size from 

 14/>i in diameter to 18 X 16/x. 



The peridial cells are thickened on one side : when seen flat they 

 are angular in contour, and measure about 20/x in diameter. 



a. HEMIPUCCINIA. 



1. Pdccinia Iridis, (D. C.) 



On Iris florenfina, L. 

 Oi- Iris pallida, Lam. 



This host is very frequently attacked by a uredo bearing fungus, 

 and I have found it abundantly both in spring (March) and in autumn 

 (September, November). The pustules, which are borne on both sur- 

 faces of the leaves equally, are linear and brown, flanked by the rent 

 edges of the epidermis. The spores are round or oval, deep brown, 

 deciduous, falling off without any portion of stalk adhering, and 

 measuring when fresh from 26/x, in diameter to 30 x 24 or 34 x 20/x. 

 The epispore is spiny or tuberculated. They germinate freely in water 

 after the manner of uredospores. The end of the long germ tube 

 sometimes swells into a head, not, however, separated by a septum (fig. 

 7, PI. IV), The spores, whether collected in spring or late autumn from 

 dried leaves, always germinated in the same way. Each spore has three 

 germ pores. 



I found the teleutospores for the first time at the end of 1889, 

 although I had looked carefully for them in previous years, and then 

 in one locality only. They are therefore rare notwithstanding the 



