250 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN 



with aecia on Pyriis and Cydonia, we apparently have not yet 

 exhausted the possibilities with regard to Jimipenis chinensis. 

 There appears to be another caulicolous form on this host which 

 is connected with aecia on various species of Mains, viz. Gymno- 

 sporangiitm Yaniadae Miyabe. Miyabe uses this name in a 

 Japanese report of the Sapparo Botanical Society (Bot. Mag. 

 Tokyo 17'-; 34). With some assistance the writer makes out that 

 this occurs on the "stout part" of the stem of Juniper us chineusis 

 with aecia on the leaves of Mains (Pyrus) Malus, Malus {Pyrus) 

 spectabilis, and Malus {Pyrus) Toringo. Through the kindness of 

 Dr. H. Sydow the writer has secured a specimen of the aecia on 

 Malus spectabilis. The peridial cells are verruculose with small 

 oval papillae, being quite unlike the spiniferous ones of G. Photiniae 

 or the rugose ones of G. koreaense. The chestnut-brown aecio- 

 sporcs are also very unlike the yellow ones of R. Photiniae, which 

 without doubt belongs to a caulicolous form on J. chinensis. 

 Believing that the Roestelia represented a good species the writer 

 used the name G. Yamadae, in his monographic account (Bull. 

 N. Y. Bot. Garden 7: 446. 1911), giving credit to Miyabe. 

 A full description of the aecial stage was given but the telia were 

 said to be unknown. To that we can now add what should ha\"e 

 been included then, that the telia are said to be on the stems of 

 Juniperiis chinensis but that is all the information which we have. 

 Pourthiaea villosa also has another aecial stage upon it which 

 is extremely interesting. This one is not Roestelia-\\\ie but has 

 short cupulate peridia. In structure and habit this form which 

 Sydow named Aecidium Poiirthiaeae is so much like the North 

 American species, G. Blasdaleanum, that the writer has tenta- 

 tively referred it to that species. Our G. Blasdaleanum, which 

 is coming to be of considerable importance,^ has been culturally 

 connected to a telial form on the incense cedar, Heyderia decurrens 

 (generally referred to as Libocedrus decurrens). While there has 

 been no report from Japan of a similar telial form, and even 

 though Heyderia decurrens does not occur there, the fact that 



' See Jackson, H. S. A new jioniaceous rust of economic importance, Gymnospor- 

 angium Blasdaleanum. Phytopathology 4: 261-270. 1914. And O'Gara, P. J. The 

 Pacific Coast cedar rust of the apple, pear, quince and related pome fruits caused by 

 Gytnnosporangium Blasdaleanum. Tech. Bull. No. 2, Office of Pathologist and Local 

 U. S. Weather Bureau Station for Rogue River \'alley, 1913. 



