304 INDEX TO AMERICAN BOTANICAL LITERATURE 
Hutcheson, T. B., & Wolfe, T. K. The effect of hybridization on 
maturity and yield in corn. Virginia Agr. Exp. Sta. Tech. Bull. 
18: 161-170. Je 1917. 
Jackson, H. S. Carduaceous species of Puccinia—lI. Species occur- 
ring on the tribe Vernoniae. Bot. Gaz. 65: 289-312. 15 Ap 1918. 
Includes Puccinia fraterna, P. hyalina, P. rata, P. idonea, P. notha, P. praealta, 
P. discreta, P. inaequata and P. Kuntzii, spp. nov. 
Jones, D. F. Bearing of heterosis upon double fertilization. Bot. 
Gaz. 65: 324-333. f. 1-3. 15 Ap 1918. 
Keith, G. W. Control of cherry leaf spot in Wisconsin. Wisconsin 
Agr. Exp. Sta. Bull. 286: 1-11. f. 1-7. F 1918 
Kline, W. A. A rare hybrid oak in Pennsylvania. Forest Leaves 16: 
120, 121. Ap1rgr18._ [Illust.] 
Langdon, L. M. The ray system of Quercus alba. Bot. Gaz. 65: 
313-323. f- I-22. 15 Ap 1918. 
Lipman, C. B. A new method of extracting the soil solution. Univ. 
Calif. Publ. Agr. Sci. 3: 131-134. 15 Mr to18. 
Lloyd, C.G. Letter No. 66. 1-16. Cincinnati. O 1917. 
Lloyd, C. G. Mycological notes. 51: 717-732. f. 1075-1100 + por- 
trait. N 1917; 52: 733-748. f. ITI0I-1123 + portrait. D 1917; 
53: 749-764. f. 1124-1148 + portrait. Ja 1918. 
Lloyd, C. G. The myths of mycology. 1-16. Exhibits A-E. Cin- 
cinnati. D 1917. 
art 1 
Loeb, Il The law controlling the quantity and rate of repeNOrIRIDA: 
Proc. Nat. Acad. Sci. 4: 117-121. 15 Ap 1918. 
Love, H. H., & Craig, W. T. Methods used and results obtained in 
cereal investigations at the Cornell station. Jour. Am. Soc. Agron. 
10: 145-157. pl. 4+/f. 24. Ap 1918. 
Long, E.R. Further results in desiccation and respiration of Echino- 
cactus. Bot. Gaz. 65: 354-358. f. 1. 15 Ap 1918. 
MacCaughey, V. The genus Gleichenia (Dicranopteris) in the Hawaiian 
Islands. Torreya 18: 41-52. 10 Ap 1918. 
McClelland, C.K. The time at which cotton uses the most moisture. 
Jour. Am. Soc. Agron. 10: 185-1809. Ap 1918. 
McCubbin, W. A. Dispersal distance of urediniospores of Cronartium 
ribicola as indicated by their rate of fall in still air. Phytopathology 
Bt 48 36. f. ¥... 24 Ja 1638: 
