INDEX TO AMERICAN BOTANICAL LITERATURE 565 
Olsson-Seffer, P. Castilla en zijn cultur. Dept. Landb. Suriname 
Bull. 27: 7-57. Ap 1912. 
Translated from the English manuscript by J. Kuijper. 
Phillips, F. J. Emory oak in southern Arizona. U. S. Forest Serv. 
Cire. 201: 1-15. pl. 1-5. 27 Jl 1912. 
Piper, C. V. On the identity of Dolichos unguiculatus Linnaeus. 
Torreya 12: 189, 190. 9 Au 1912. 
Quehl, L. Echinocactus violaciflorus Quehl spec. nov. Monats. Kak- 
teenk. 22: 102-105. 15 Jl 1912. [Illust. 
Ramaley, F., & Elder, M.E. The grass-flora of Tolland, Colorado, and 
vicinity. Univ. Colorado Stud. 9: 121-141. f. 7, 2. My 1912. 
Reed, C. A. The pecan. U.S. Dept. Agr. Plant Ind. Bull. 251: 7-58. 
§. t=25.- 12 Jl 1912. 
4° ‘ Ey + Ge ne +7 Se nk sth 
Hicoria Pecan. I f h ld b hab g 
flowering habit, occurrences of fungous diseases, e 
Robbins, W. W. Algae in some Colas: oils: Colorado Agr. Coll. 
Exp. Sta. Bull. 184: 24-36. pl. 1-4. Je 1912. 
Robbins, W. W. Preliminary list of the algae of Colorado. Univ. 
Colorado Stud. 9: 105-118. My 1912. 
Roig y Mesa, J. T. Cactdceas de la flora Cubana. Rev. Facult. Let. 
Ci. Univ. Habana 14: 301-350. My 1912. [Illust.] 
Rolfe, R. A. Evolution of the Orchidaceae. Orchid Rev. 20: 204-207. 
(Continued from vol. 19, p. 192.) Jl 1912. 
Schreiner, O., & Skinner, J. J. The toxic action of organic compounds 
as modified by fertilizer salts. Bot. Gaz. 54: 31-48. f. 1-5. 15 Jl 
1912. 
Seaver, F. J., & Clark, E. D. Biochemical studies on soils subjected 
to dry heat. Biochem. Bull. 1: 413-427. pl. 7. Mr 1912. 
Also includes information on the growth of fungi as affected by heat. 
Shafer, J. A. Botanical exploration in Oriente, Cuba. Jour. N. Y. 
Bot. Gard. 13: 92-99. Jl 1912. 
Sill, W.H. Grape culture in Pennsylvania. Dept. Agr. Pennsylvania 
Bull. 217: 9-66. f. 1-52. 1912. 
Includes a chapter on fungus diseases of grapes. 
Skinner, J. J., & Beattie, J. H. Effect of asparagin on absorption and 
growthin wheat. Bull. Torrey Club 39: 429-437. dl. 33. 9S 1912, 
Thompson, W.P. The structure of the stomata of certain Cretaceous 
conifers. Bot. Gaz. 54: 63-67. pl. 5, 6. 15 Jl 1912. 
; , O.I. Viable Bermuda grass seed produced in the locality of 
Raleigh, N. C. Jour. Elisha Mitchell Sci. Soc. 28: 95. Au 1912. 
ailes, G. H. Some desmids from alpine stations in Colorado. Univ. 
Colorado Stud. 9: 119, 120. My 1912. 
