Teleutospores.— Sori hypophyllous, small, reddish-brown ; sporep inter- 

 cellujar, 20-38 a long, divided in various ways into smaller 

 daughter spores; contents orange color: germination in spring; 

 Bporidia spherical 4-6 ;x in diameter. 



On Tilia cordata Mill. var. japonica Miq. and T. 



Miqucliana Maxim. (# * >**VM s? a) ; September to October, very 

 common in the vicinity of Sapporo. (Miyabe, Hiratsuka.) 



Remarks.— This species is very prevalent on the leaves of linden- 

 trees in the vicinity of Sapporo, especially attacking the leaves of 

 strong shoots from the base of the trunk. 



From the middle of September to the earlier part of October, the 

 leaves are seriously attacked by this fungus and become orange-yellow 

 in color on their under surface, owing to the infection of the uredo- 

 spores ; on the upper surface just opposite to these diseased spots they 

 turn at first yellowish-brown and finally dark-brown in color. The 

 peeudoperidia of the uredosori are provided with an opening at the 

 apex, and are made up of isodiametrical polygonal cells. The cells 

 bordering the opening or ostiole are generally roundish and thicker 

 walled, but toward the base, the cells become polygonal and thin 

 walled merging in the network of hyph» in the subhymenial layer. 

 In this species and also in Puccinia strum Styracinum sp. nov. which 

 will be described later, the ostiole is not provided with the teeth-like 

 projections as in the case of Melampsora betulina and M. Aim'. The 

 uredospores are formed singly and never in chains. The uredosori are 

 often provided with a few hyaline clavate paraphyses. 



The teleutospores are usually formed near the uredosori, forming 

 reddish-brown flat sori. They are at times formed also in the uredosori. 

 The spores are intercellular formed directly beneath the epidermis; 

 they are divided longitudinally or obliquely into many smaller daughter 

 spores. These daughter spores" are variable in shape and size according 

 to the mode of division. When the teleutospores are formed among 

 the uredosori, they assume n. somewhat different shape. 



The teleutospores on the fallen leaves of the linden-tree were 

 collected in the spring (April 19, 1896) and kept moist under a bell- 

 glass until May 7, to observe the mode of their germination without 

 any success. On May 8, the leaves which bore the teleutospores in 

 abundance, were cut up into small pieces and placed in a small moist 

 chamber: on May 12, they '_rennina> <-<l iibuudantlv showing a light- 



