INDEX TO AMERICAN BOTANICAL LITERATURE 501 
Pritchard, F. J. Change of sex in hemp. Jour Heredity 7: 325-329. 
f. 19. 26 Je 1916. 
Rand, F. V., & Enlows, E. M.A. Transmission and control of bacterial 
wilt of cucurbits. Jour. Agr. Research 6: 417-434. pl. 53,544 
f. 1-3. 12 Je 1916. 
Rangel, E. Contribuicado para e estudo dos Puccinias das Myrtaceas. 
Archiv. Mus. Nac. Rio de Janeiro. 18: 147-156. pl. I-4. 1916. 
Includes descriptions and illustrations of four new species. 
Rangel, E. Fungos do Brazil, novos ou mal conhecidos. Archiv. 
Mus. Nac. Rio. de Janeiro. 18: 157-164. pl. 5-7. 1916. 
Includes descriptions of fifteen new species in Puccinia (1), Uromyces (3), Uredo 
(4), Mycosphaerella (1), Laestadia (2), Phyllosticta (1), Coniothyrium (1), Septo- 
gleum (1), Cercospora (1), and Phaeophleospora eugeniae gen. et sp. nov. 
Reed, E. L. Ecologic notes on Drosera annua. Torreya 16: 125-130. 
Jo ty Be SAG JE YO: 
Reed, G. B. The measurement of oxidation potential and its signif- 
icance in the study of oxidases. Bot. Gaz. 61: 523-527. f. I, 2 
15 Je 1916. 
Rosen, H.R. A known species of smut on a new host. Mycologia 8: 
225, 226. 15 Jl 1916. 
Cintractia leucoderma on Cyperus Gatesii. 
Rowlee, W. W. Plants from southern Patagonia collected by Charles 
Wellington Furlong. Bull. Torrey Club 43: 305-321. 29 Je 1916. 
Sampaio, A. J. de. Contribuicao ao estudo da flora do estado de Minas 
Geraes. Archiv. Mus. Nac. Rio de Janeiro 18: 1-38. 1916. 
Sampaio, A. J. de. Plantae novae vel minus cognitae. I. Orchi- 
daceae. Archiv. Mus. Nac. Rio de Janeiro 18: 55-63. pl. I-3. 1916. 
Includes Quekettia longirostellata, Pleurothallis Gouveiae, P. acuminatipetala and 
Phymatidium paranaense, spp. nov. 
Satchwell, M. A. Ferns of Duval County, Florida. Am. Fern Jour. 
6: 39-42. Je 1916. 
Saunders, C.F. A useful wild fruit. Am. Bot. 22:20, 21. F 1916. 
Opuntia Ficus-Indica. 
Schaffner, J. H. A general system of floral diagrams. Ohio Jour. 
Sci. 16: 360-364. pl. 27. Je 1916. 
Schultz, E. S. Silver-scurf of the Irish potato caused by Spondylo- 
cladium atrovirens. Jour. Agr. Research 6: 339-350. pl. 45-48. 
5 Je 1916. 
Seaver, F. J. Photographs and descriptions of cup-fungi—III. 
Peziza domiciliana and Peziza repanda. Mycologia 8: 195-199. 
pl. 188, 189. 15 Jl 1916. 
