INDEX TO AMERICAN BOTANICAL LITERATURE 389 
Levine, M. The physiological properties of two species of poisonous 
mushrooms. Mem. Torrey Club 17: 176-201. pl. 1, 2+/f. 1, 2. 
Io Je 1918. 
Lewton, F.L. Kokia: a new genus of Hawaiian trees. Smithsonian 
Misc. Coll. 605: 1-4. pl. 1-5. 220 1912. 
Lewton, F. L. Rubelzul cotton: a new species of Gossypium from 
Guatemala. Smithsonian Misc. Coll. 604: 1, 2. pl. 1, 2. 21 O 1912. 
Lloyd, F. E. The effect of acids and alkalis on the growth of the pro- 
toplasm in pollen tubes. Mem. Torrey Club 17: 84-89. 10 Je 
1918. 
Macdougal, D. T., & Cannon, W. A. The conditions of parasitism in 
plants. 1-60. pl. 1-10 +f. 1, 2. IgIo. 
Carnegie Inst. Wash. Publ. 129. 
Ma4rquez, C.C. Tratado elemental de botanica. 1-533. Bogota. 1913, 
McAtee, W. L. A sketch of the natural history of the District of 
Columbia together with an indexed edition of the U. S. Geological 
Survey’s 1917 map of Washington and vicinity. Bull. Biol. Soc. 
Washington 1: 1-142. My 1918. 
Contains lists of plants of the District, a chapter on ‘‘ Magnolia bogs near Wash- 
ington, D. C., and their relation to the Pine Barrens,” etc. 
McDougall, W. B. Some edible and poisonous mushrooms. Bull. 
Illinois State Lab. Nat. Hist. 11: 413-555. pl. 86-143 +f. 1. N 
I9I7. 
Medsger, O. P. Two months in the southern Catskills. Mem. Torrey 
Club 17: 294-300. 10 Je 1918. 
Murrill, W. A. Collecting fungi at Delaware Water Gap. Mem. 
Torrey Club 17: 48-51. 10 Je 1918. 
Nichols, G. E. The interpretation and application of certain terms 
and concepts in the ecological classification of plant communities. 
Plant World 20: 305-319. O1917;—II. Plant World 20: 341-353. 
N 1917. 
Nishimura, M. A carrier of the mosaic disease. Bull. Torrey Club 
45: 219-233. pl. 7. 20 Je 1918. 
Olive, E. W. Potato diseases. Brooklyn Bot. Gard. Leaflets. 6: 
[1-4]. 29 My 10918. 
Rands, R. D. Early blight of potato and related plants. Wisconsin 
Agr. Exp. Sta. Research Bull. 42: 1-48. f. 1-10. Ap 1917. 
Renaudet, G. Notas sobre las adquisiciones recientes de la fitoqui- 
mica y de la botanica médica. Rev. Chilena Hist. Nat. 14: 55-65. 
I9I0. 
