46 INDEX TO AMERICAN BOTANICAL LITERATURE 
Cook, O. F. Staircase farming of the ancients. Nat. Geog. Mag. 29: 
474-534. My 1916.  [Illust.] 
Includes numerous references to Peruvian plants. 
Coons, G. HH. An undescribed bark canker of apple and the associated 
organisms. Rep. Michigan Acad. Sci. 17: 117-122. pl. 6. 1916. 
Coons, G. S. The Michigan plant disease survey for 1914. Rep. 
Michigan Acad. Sci. 17: 123-133. pl. 7-10. 1916, 
Davie, R. C. Some Brazilian plants. Jour. Bot. 55: 215-223. Au 
Includes Gaultheria Willisiana sp. nov. 
Dearing, C. Muscadine grape breeding. Jour. Heredity 8: 409-424. 
J. 40-18... S 10917. 
Delavan, C. C. The relation of the storage of the seeds of some of the 
oaks and hickories to their germination. Rep. Michigan Acad. 
Sci. 17: 161-163. 1916. 
Doolittle, S. P. Cucumber scab caused by Cladosporium cucumeri- 
num. Rep. Michigan Acad. Sci. 17: 87-116. 10916. 
Farwell,O.A. Fern Notes. Ann. Rep. Michigan Acad. Sci. 18: 78-94. 
FoL7s 1916: 
Fernald, M. L. Contributions from the Gray Herbarium of Harvard 
University.— New Series, No. L. Rhodora 19: 133-155. I0S 1917. 
I. Some polygonums new to North America. II. New or critical species or 
varieties of Ranunculus. III. Some color forms of American anemones. IV. New 
species, varieties and forms of Saxifraga. V. A new Vitis from New England. VI. 
Gentiana clausa a valid species. VII. Some forms of American gentians. VIII. 
Some new or critical plants of eastern North America. 
Gleason, H. A. A prairie near Ann Arbor, Michigan. Rhodora 19: 
163-165. 10S 1917. 3 ‘ 
Goss, R. W.; & Doolittle S. P. The effect of fungicide on the spore 
germination of Longyear’s Alternaria. Rep. rile Acad. Sci. 
¥7: 183-187. tors. 
Gourley, J. H. Fruit bud formation—a criticism. Bull. Torrey Club 
44:455-457-f. 2. 15S 1917. 
Gruzit, O. M., & Hibbard, R. P. The influence of an incomplete cul- 
ture solution on photosynthesis. Rep. Michigan Acad. Sci. 18: 
50-52. I9I16. 
[Abstract.] 
Hahn, G. G., Hartley, C., & Pierce, R.G. A nursery blight of aaah 
Jour. Agr. Research 10: 533-540. pl. 60, 61. 3S 1917 
Hance, R. T. An attempt to modify the germ plasm of Oenothera 
hrditaga the germinating seed. Am. Nat. 51: 567-572. S 1017. 
O. E., & Hibbard, R. P. A simplification of the present 
