(73) 
3. Peronospora gangliformis , Berk. Lettuce mould. 
4. Microsphseria elevata , n. sp. On leaves of Catalpa bignonioides ; mag- 
nified 75 diarn. 
5. Sporangia of same. 
6. Peronospora viticola , B. & C. On grape leaves. 
7. Mycelium of same, with haustoria in pith of young stem.; magnified 
350 diam. 
8. Peronospora infestans , Mont. Magnified 350 diam. 
PLATE III. 
1. Section of leaf of Pinus austriaca, with Pestalozzia . Magni- 
fied 20 diam. The leaves are probably dying from 
some other fungus. 
la. Spores of same, magnified 85 diam. 
2. Podosphsera kunzev( [?) Lev. On cultivated cherry leaves ; magnified 
75 diam. 
2a. Sporangium of same. 
£b. Macrosporium-like or capnodium-like bodies on appendages. 
2c. Appendage having moniliform divisions. 
2d. Similar to c. Found mostly on mycelium. 
3. Sphserotheca castagnei (?) Lev. On Erechtites hieracifolus ; magnified 
75 diam. 
4. Sporangia of same. 
5. Rhytisma acerinum , Fr. On leaf of Acer dasycarpum ; natural size. 
6. Vertical section of same. c. Asci with young spores. 
7. Plycinidia of an Erysiphe on Verbena urticifolia. 
7f. Macrosporium-like forms found with latter. 
PLATE IY. 
1. Erysiphe , . On Aster puniceus. 
2. Microsphseria extensa, C. & P. On Quercus rubra ; magnified 75 diam. 
3. Appendage, magnified 300 diam. 
4. Ruptured conceptacle of same ; a. sporangia. 
5. Triposporium-like bodies on same mycelium. 
6. Phylactinia guttata , Lev. On Fraxinus viridis. 
7. 8, 9, 10 & 11. Microsphseria ravenelii , Berk. On Grleditchia triacanthos. 
12. Macrosporium-like bodies, with Microsphseria fresii , 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. 
