( 73 ) 



Peronospora (janglifoi-iniis^ Berk. Lettuce mould. 



Microsphseria elevata, n. sp. On leaves of Catalpa bignonioides : mag- 

 nified 75 diam. 



Sporangia of same. 



Peronospoi-a vitico[a, Ix & C. On grape leaves. 



3Iycelium of same, with baustoria in pith of young stem.: magnified 

 350 diam. 



Peronospora in/esfans, Mont. ^Magnified 350 diaiu. 



PLATE III. 



Section of leaf of Pinus austriaca, witb Pcsfalozzia . Magni- 

 fied 20 diam. The leaves are probably dying from 

 some other fungus. 



Spores of same, magnified 85 diam. 



Podosphsera kunzei {?) Lev. On cultivated cherry leaves : magnified 

 75 diam. 



Sporangium of same. 



Macrosporium-like or capnodium-like bodies on appendages. 



Appendage having moniliform divisions. 



Similar to c. Found mostly on mj'celium. 



Sphserotheca castagnei {?) Lev. On Erechtites hieracifolus ; magnified 

 75 diam. 



Sporangia of same. 



Rhytisma acerinum.Vr. On leaf of Acer dasycarpum ; natural size. 



Vertical section of same, c Asci with young spores. 



Plycinidia of an Erysiphe on Verbena urticifolia. 



Macrosporium-like forms found with latter. 



PLATE IV. 



Erysiphe^ . On Aster puniceus. 



Micro»phseria extcnsa, C. k P. On Quercus rubra; magnified 75 diam. 

 Appendage, magnified 300 diam. 

 Ruptured conceptacle of same ; a. sporangia. 

 Triposporium-like bodies on same mycelium. 

 Phylactinia guttata, Lev. On Fraxinus viridis. 

 8, 9, 10 & 11. Mirronphfrria ravenelii, Berk. On Gleditchia triacanthos. 

 Macrosporium-like bodies, with Microsphscria /resii, Lev. On leaves 

 of Syringa vulgaris. 



THE TREE IN WINTER. 



PLATE I. 



1. Aesculus glabra, Willd. Buckeye. 



2. Acer saccharinum, Wang. Sugar maple. 



3. Acer dasycarpum, Ehrh. Soft maple. 



