14 



Var. Thesii Berk. (C Comandroe P.) 



On Comandra umbellata. Burl., Aug. 1893; G. 7. 



Gymnosporangium clavipes C. & P. (^Rastelia aurantiaca.') 



I. On fruit of Amelanchier alnifolia, June-berry. Burl., Aug. 1897; 

 O. 1337. 



I. On fruit of Amelanchier spicata. Snake Mt., July, 1898; 0. 1793. 



Gymnosporangium globosum Farl. {Kcrstelia globosa.) 



I. On Cratcegus coccinea, Hawthorn. Abundant. Burl., Oct. 1891; 



C. 1338. 



I. On Pyrus Americana, Mountain Ash, Abundant. Burl., Oct. 



1890 ; C. 1340. 



III. On Juniperus Virginiana, Red Cedar. Abundant, producing 



large round swellings, or "cedar apples." Burl., May. 1891 ; J. 1341. 



Gymnosporangium macropus Link. (^Ra'stelia ph-ata.) 



I. On Pyrus Malus, Apple. South Hero, July, 1897 ; Waugh, 

 1342. 

 Gymnosporangium Nidus-avis Thaxter. 



I. On Amelanchier Canadensis, Service-tree. Snake Mt., July, 

 1898; J. and O. 1795. 



III. On Juniperus Virginiana, producing distorted growth or 

 "witches' brooms." Burl., May, 1898; O. 1371. 



Roestelia Cornuti forma Amelanchieris Wallr. 



On Amelanchier Canadensis, Service-tree. Burl., Sept. 1897 ; Q. 

 1336. 

 Melampsora farinosa (Pers.) Schroet. {M. salicina Lev.) 



II. On Salix cordata. Willow. Beaver, Sept. 1897; O. 1252. 

 II. On Salix myrtilloides. Charlotte, May, 1896; J. 1253. 

 II. On Salix nigra. Burl., Sept. 1897; O. 1254. 



On Salix sp. Newfane, Sept. 1890 ; G. 727. 



Melampsora populina (Jacq.) Lev. 



II., III. On Populus monilifera, Cotton-wood. Common. Burl., 

 Oct. 1890; J. 1255. 



On Populus tremuloides, American Aspen. Newfane, Sept. 1892 ; 

 G. 126. 

 Melampsora Scolopendrii (Fuckel.) Farl. 



On Onoclea sensibilis. Williston, Sept. 1895; Tracy, 1796. 



On Osmunda Claytoniana. Walden, Aug. 1898 ; O. 1895. 



On Woodwardia Virginica. Burl., Aug. 1898; O. and H. 1903. 



Peridermium decolorans Pk. 



I. On Picea nigra, Black Spruce. Burl., July, 1896; J. 325. 



