498 INDEX TO AMERICAN BOTANICAL LITERATURE 
Briggs, L. J.. & Shantz, H. L. Comparison of the hourly evaporation 
rate of atmometers and free water surfaces, with the transpiration 
rate of Medicago sativa. Jour. Agr. Research 9: 277-292. pl. 4-6 + 
f. 1-4. 28 Myi1917. | 
Brotherus, V.F. Musci novi paraguenses. Bryologist 20:47. 29 My 
4 
Porotrichum cavifolium and Porothamnium parvirete, spp. nov. are described. 
Burnham, S.H. The Naiadales of the flora of the Lake George region. 
Torreya 17: 80-84. 2 Je 1917. 
Chase, A. List of writings on Bryophytes by Rev. E. J. Hill. Bry- 
* ologist 20: 41. 29 My 1917. 
Collins, J. F. On using an ether freezing microtome in warm and 
damp weather. Phytopathology 7: 222, 223. 2 Je 1917. 
Collins, G. N. Hybrids of Zea ramosa and Zea tunicata. Jour. Agr 
Research 9: 383-396. pl. 13-21. 11 Je 1917. 
Conn, H. J. Soil flora studies. V. Actinomycetes in soil. N. Y, 
Agr. Exp. Sta. Tech. Bull. 60: 1-25. Mr 1917. 
Cook, M. T., & Schwarze, C. A. Apple scab on the twigs. es es! 
pathology 7: 221, 222. 2 Je 1917. 
Cribbs, J. E. Plant associations of western Pénhepivanta with special 
reference to physiographic relationship. Plant World 20: 97-120. 
f. 1-4. Ap 1917;—II. Plant World 20: 142-157. f. 5-7. My 
sy SOFT 
Cunliffe, R.S. Yuca su cultivo, variedades, contenido en almidon y 
fabricacion. Cuba Agr. Exp. Est. Bol. 34: 1-66. Jl 1916. [Ilust.] 
citricas en Cuba. Cuba Agr. Exp. Est. Bol. 32: 1-62. S 1916. 
[Illust. 
Cunningham, B. Sexuality of filament of Spirogyra. Bot. Gaz. 63: 
486-500. pl. 23-25. 19 Je 1917 
Curtis, R. S.  Eupatorium seats. the cause of trembles. Jour. 
Agr. Research 9: 397-404. pl. 22-24. 11 Je 1917 
Davis, W.T. Juniperus communis on Long Island seat Staten Island. 
Torreya 17: 99, 100. f. r. 13 Je 1917. 
Deam, C. C. Plants not hitherto reported from Indiana—VI. Proc. 
Indiana Acad. Sci. 1915: 135-140. 10916. 
Denny, F.E. Permeability of membranes as related to their soeieene 
tion. Bot. Gaz. 63: 468-485. f. 1-6. 19 Je 1917. 
Detjen, L.R. Breeding southern grapes. Jour. Heredity 8: 252-258- 
f. 3-6. 25 My 1917. 
Donaghy, F. The morphology of Riccia fluitans L. Proc. ‘Indiana 
Acad. Sci. 1915: 131-133. 1916. 
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