kern: JAPANESE SPECIES OF GYMNOSPORANGIUM 247 



The suggestion In the foregoing paragraph that a leaf-inhabiting 

 form on /. chinensis was responsible for Shirai's culture on Pyrus 

 sinensis makes it necessary to dispose of that form in some way. 

 When the writer prepared his monograph there were no Japanese 

 species described on the leaves or green branches of Juniperus 

 with the possible exception of G. asiaticum Miyabe (Bot. Mag. 

 Tokyo 17^: 34. 1903). This was described in the Japanese 

 language and so far as the writer could make out was not suf- 

 ficiently characterized to establish the name. It carries with it 

 the information that the Gymno sporangium is on the leaves of 

 Juniperus chinensis, Pyrus sinensis, and Cydonia vulgaris. So 

 far as the general nature of the telia and the aecial connections 

 are concerned, the observations of Miyabe and the work of Shirai 

 agree. This situation is further strengthened by culture work of 

 Hara in 1913 (Bot. Mag. Tokyo 27: 348). There seems little 

 doub^ that the aecia with which we are dealing here are all refer- 

 able to R. koreaensis P. Henn. As to the identity of the telial 

 phase and a proper name for it, the solution is not so easy. If we 

 regard G. asiaticum as a hyponym w^e find the next name which 

 has been proposed for a leaf-inhabiting Japanese form is G. 

 Haraeanum (Sydow (Ann. Myc. 10: 405. 1912). In the original 

 publication, Sydow made no mention of an aecial connection but 

 in a very clear and comprehensive review of the whole matter 

 Ito (Bot. Mag. Tokyo 28: 220-223) has shown that the leaf forms 

 described by Shirai, Hara, and Sydow are identical and without 

 doubt belong with R. koreaensis on Pyrus sinensis. In 19 14 

 Long^ founded a' new species, Gymnosporangium chinense, on 

 specimens of Juniperus chinensis which were imported from Japan 

 by the Elm City Nursery, Westville, Connecticut, and which were 

 brought to the attention of mycologists and pathologists by 

 Clinton. This same importation of junipers had on them a stem 

 form which has been identified without doubt as G. Photiniae 

 {G. japonicum). Long recognized that this new species on the 

 leaves and green twigs of Juniperus chinensis was very closely 

 related to G. Haraeanum on the same host and originally from the 

 same general locality. He concluded, however, that the two were 

 distinct, stating that "they differ in certain fundamental micro- 

 scopic characters." The chief difference which he points out is 

 the position of the germ pores in the colorless thin-walled telio- 



1 Long, W. H. Jour. Agr. Research i: 354. 19 14. 



