224 BROOKLYN BOTANIC GARDEN MEMOIRS 



G. Kernianum on Amelanchier but obtained the development of 

 pycnia only. Field observations and collections by Bethel in Colorado 

 indicate strongly that the aecial stage occurs on Amelanchier. The 

 Roestelia, however, is quite different from R. Harknessiana. 



40. Gymnosporangium koreaense (P. Henn.) Jackson, Jour. Agr. 



Research 5: 1006. 1916. 

 Roestelia koreaensis P. Henn. in Warburg, Monsunia i: 5. 1899. 

 Gymnosporangium asiaticiim Miyabe, Bot. Mag. Tokyo 17: 34. 



1903. (Hyponym.) 

 Gymnosporangium Haraeanum Syd. Ann. Myc. 10: 405. 1912. 

 Gymnosporangium chinense Long, Jour. Agr. Research i : 353. 

 1914. 

 On Malaceae: I. 



Pyrus sinensis Lindl.^ — Portland (Orient), June ii, 1914, 2666. 

 On Juniperaceae: III. 



Juniperus chinensis L.- — Portland (Orient), March 29, 1915, 2668. 



This species has been shown by the writer (1. c.) to have been 



established at Portland (Orient), Oregon, on trees imported from 



Japan. It has been cultured on Pyrus sinensis and Cydonia vulgaris. 



41. Gymnosporangium Nelsoni Arth. Bull. Torrey Club 28: 665. 



1901. 

 On Juniperaceae: III. 



Juniperus occidentalis Nutt. — Austin, Grant Co., April, 1916, J. R. 

 Weir, 257. 



Juniperus scopulorum Sarg. — Whitman Nat. Forest, Aug. 1915, 

 J. R. Weir, 166. 



This species causes conspicuous galls on the branches of Juniperus. 

 The aecial stage has been collected on Amelanchier, Cydonia, Pera- 

 phyllum, Pyrus and Sorbus. 



Arthur (Mycol. 4: 61. 1912; 7: 78. 1915) has conducted cul- 

 tures, using telial material from Colorado. Weir & Hubert (Phyto- 

 path. 7: 109. 191 7) have recently confirmed these results, using 

 material collected in Montana, on J. communis and /. scopulorum. 



42. Gymnosporangium nootkatensis (Trel.) Arth. Am. Jour. Bot. 



3: 44. 1916. 

 Uredo nootkatensis Trelease, Alaska Harr. Exped. 5: 36. 1904. 

 Uredo Chamaecyparidis-nutkaensis Tubeuf, Nat. Zeits. Forst.- 

 Landw. 2: 91. 1914. 

 On Juniperaceae: 



Chamaecyparis nootkatensis (Lamb.) Spach — North slope Mt. 

 Jefferson, trail to Hanging Valley, Aug. 15, 1914, H. P. Barss & G. B. 



