﻿Index to American botanical literature 599 



Hitchcock, A. S., & Chase, A. Tropical North American species of 



Panicum. Contr. U. S. Nat. Herb. 17: i-xii + 459-539-/. 11-149. 



24 Jl 1915- 

 Hunnewell, F. W. Botrychium lanceolatum in the Yellowstone. 



Rhodora 17: 143. lo Jl 1915. 

 Humphrey, C. J. Tests on the durability of greenheart (Nectandra 



Rodiaei Schomb.). Mycologia 7: 204-209. pi. 162. 28 Jl 1915. 

 JeUett, E. C. Ferns of the Wissahickon Valley. Am. Fern Jour. 5: 



87-91. Jl 1915. 

 Johnston, J. R. Entomogenous fungi of Porto Rico. Porto Rico 



Board Comm. Agr. Bull. 10: 1-33. pL 1-9. 1915. 

 Johnson, D. S. The history of the discovery of sexuality in plants. 



Smithsonian Inst. Ann. Rept. 1914: 383-406. 1915. 

 Jones, L. R. Problems and progress in plant pathology. Smithsonian 



Inst. Ann. Rept. 1914: 407-419. 1915. 

 Kirkwood, J. E. Peridermium pyriforme and Cronartium comandrae. 



Phytopathology 5: 223, 224. Au 1915. 

 Knowlton, C. H. Plants and plant societies at Roque Bluffs, Maine. 



Rhodora 17: I45-I55- Au 1915. 

 Knowlton, F. H. Seed-bearing ferns. Am. Fern. Jour. 5: 83-87. Jl 



1915. 

 Kunkel, L. O. A contribution to the life history of Spongospora suh- 



terranea. Jour. Agr. Research 4: 265-278. pi. 39-43- I5 Je I9I5- 

 Macbride, J. F. Sisymbrium brachycarpon and allies. Rhodora 17: 



138-141. Jl 1915. 

 Macbride, J. F. A white-flowered Spiraea tomentosa. Rhodora 17: 



142, 143- Jl 1915- 

 Macbride, J. F. Range extensions of two grasses. Rhodora 17: 159, 



160. Au 1915. 

 Macdougal, D. T., Long, E. R., & Brown, J. G. End results of desicca- 

 tion and respiration in succulent plants. Physiological Researches 



i: 289-292. Jl 1915. 

 Mackenzie, K. K. Notes on Carex—VlU. Bull. Torrey Club 42: 



405-422. 29 Jl 1915. 



Mattoon, W. R. Life history of shortleaf pine. U. S. Dept. Agr. Bull. 



244: 1-46. PL i-io -f /. 1-12. 21 Jl 1915. 

 Mason, S. C. Botanical characters of the leaves of the date palm used 



in distinguishing cultivated varieties. U. S. Dept. Agr. Bull. 223: 



1-28. pi. 1-5 -f /. 1-15. 23 Je 1915- 



