2 BOTANICAL MAGAZINE. [Vol. xvm, 



primarily under the epidermis of the stem, but those which appear on 

 the .same place in the succeeding years seem to be formed under some few 

 layers of the cortical parenchyma to a considerable extent. 



The most characteristic feature which reveals at once the presence of 

 the fungus even to the naked eyes is that the vortical parenchyma is 

 coloured yellow wherever intercellular mycelium spreads out. 



Uromyces Sophorae japonicse Diet. 

 (Engl. hot. Jahrb. XXXI I. 1902. p. 47) (Figs. 2. 5). 



Tins is another kind of Uromyces occurring on Sophora japonica, 

 tugether with U. truncicola. It differs, however, from the latter by the 

 fact that it occurs not on the stem of the host but always on foliar 

 organs, especially on the blade, apparently with no harm to the host. 



The infection of this fungus takes place at first in spring on the blade 

 of a young leaf, where the fungus forms pale yellowish spots, each o-4 mm. 

 in diameter ; the blade then increases very slightly in thickness in those 

 places (see Fig. 2). The infection may take place also on the petiole of 

 the compound leaf, in which case it induces a local hypertrophy (as we 

 have seen in the case of Uromyces truncicola), whereby the petiole is 

 distorted in various ways (Fig. 2 b). After some time uredosori are formed 

 in these spots being preceded or accompanied by pyenidia. At first the 

 uredosori develope as brownish spots on the affected place, but on the 

 petiole they become later fused together apparently and make the whole 

 surface of that place pulverulent. Te'eutospores may sometimes occur on 

 these sori. 



In general, primarily affected parts perish after some time, so that 

 they appear as brownish dried spots on adult leaves. 



The uredospores of the primary generation give rise to the next genera- 

 tion in the other places, generally of the blade, causing in this case no 

 apparent change to the host. Sori formed there are small and irregularly 

 scattered, and show no aggregation as before (Fig. 2 c). After many 

 generations of the uredospores were produced, the fungus comes to extend 

 over a certain area of adult leaves. From the beginning of autumn teleuto- 

 spores may be seen either in the uredosori or elsewhere. The teleutosori 

 are also exceedingly small and form merely black speck's, which are composed 

 generally of a very small number of spores. In their general form, size 

 and some other respects the teleutospores resemble very much those ot 



