114 INDEX TO AMERICAN BOTANICAL LITERATURE 
Fernald, M. L. Some allies of Aniennaria alpina from Newfoundland 
and the Labrador peninsula. Rhodora 18: 236-238. N 1916. 
Graves, A. H. Chemotropism in Rhizopus nigricans. Bot. Gaz. 62: 
337-369. f. I-4. 16N 1916. 
Griffiths, D. Additional species of Opuntia. Bull. Torrey Club 43: 
523-531. pl. 30. 7 N 1916. 
Nine new species are described. 
Grignan, G. T. Cupressus thyoides (Chamaecyparis sphaeroidea). 
Rev. Hort. 88: 156. f. 35. 16 0 1916.  [Illust.] 
Giissow, H. T. Leaf roll in tomatoes? Phytopathology 6: 447. 
D 1916. 
Halsted, B. D. Tickle-grass tumblers. Torreya 16: 226-228. 16 N 
1916. 
Harris, J. A., & Popenoe, W. Freezing-point lowering of the leaf sap 
of the horticultural types of Persea americana. Jour. Agr. Research 
7: 261-268. 6N 1916. 
Hassler, E. Revision critique des Oenotheracées du Paraguay. Bull. 
Soc. Bot. Genéve 5: 266-277. 1913. 
Hawkins, L. A. Growth of parasitic fungi in concentrated solutions. 
Jour. Agr. Research 7: 255-260. 30 O 1916. 
Hedgcock, G. G., & Hunt, N. R. Dothichiza populea in the United 
States. Mycologia 8: 300-308. pl. 194, 195. 3 N 1916. 
Hesler, L. R. Black rot, leaf spot, and canker of pomaceous fruits. 
Cornell Agr. Exp. Sta. Bull. 379: 51-148. pl. 7-14+f. 18-37. 
Au 1916. 
Hoar, C. S. Sterility as the result of hybridization and the condition 
of pollen in Rubus. Bot. Gaz. 62: 370-388. pl. ro-r2. 16N 1916. 
Holland, J. H. Brazil-wood. Kew Bull. Misc. Inf. 1916: 209-225. 
jos... 1 
Howe, M.A. A note on the structural dimorphism of sexual and tetra- 
sporic plants of Galaxaura obtusata. Bull. Torrey Bot. Club 43: 
621-624. 10 Ja 1917. 
Hubbard, F. T. Notes on Gramineae—I. Rhodora 18: 231-236. 
N 1916. 
Huber, J. Plantae Duckeanae austro-guyanenses. Bull. Soc. Bot. 
Genéve 6: 179-212. f. 1-17. 30 N 1914. 
Includes descriptions of 38 new species. ~ 
Hubert, E. E. Celluloid cylinders for inoculation chambers. Phyto- 
pathology 6: 447-450. f. r. D 1916. 
