58 INDEX TO AMERICAN BOTANICAL LITERATURE 4 
Blakeslee, A. F. Zygospores and Rhizopus for class use. Science Ika 
42: 768-770. 26 N IgI15s. 
Blodgett, F. H. Morphology of the Lemna frond. Bot. Gaz. 60: 
383-390. pl. r4+f. zr. 15 N 1915. 
Boncquet, P. A., & Hartung, W. J. The comparative effect upon sugar 
beets of Eutettix tenella Baker from wild plants and from curly. 
top beets. Phytopathology 5: 348, 349. f. 1. N 1915. 
Bottomley, W. B. The root-nodules of Ceanothus americanus. Ann, 
Bot. 29: 605-610. pl. 28. O 1915. ; 
Burrill, A. C. Insect control important in checking fire blight. Phy: 
topathology 5: 343-347. N 1915. 
Buswell, W. M. The spotted trumpet leaf. Am. Bot. 21: 7 
Au 1915. [IIlust.] 
Cahn, A.R. An ecological survey of the Wingra Springs region, neat 
Madison, Wisconsin, with specieal reference to its ornithology. 
Wisconsin Nat. Hist. Soc. Bull. 13: 123-177. f. r-11. S 1915. 
Claassen, E. Caloplaca pyracea (Ach.) Th. Fr., eine Krustenflechte 
auf den Sandstein-Fussteigen'zu East Cleveland, Cuyahoga Coa 
Ohio. Hedwigia 54: 217, 218. 10 F 1914. 
Clute, W. N. A may-apple with multiple fruits. Am. Bot. 21: 92, 03: 
Au 1915. [Illust.] 
(Clute, W. N.] The spiders in flower. Am. Bot. 21: 94-96. Au 1915. 
Clute, W. N. Vine hedges. Am. Bot. 21: 86-88. Au 1915. [Illust] 
Cockerell, T.D.A. The marking factor in sunflowers. Jour. Heredity 
6: 542-545. f. 5,6. 26N 1915. ; 
Cook, M. T. Report of the plant pathologist. Ann. Rep. New Jersey 
Agr. Exp. Sta. 1914: ilies 1915. 
Includes articles by H. C. Lint, G. W. Martin, and Cook & Martin. 
Cook, M. T., & Wilson, G. W. The influence of ether on the ion 
of Endothia. Bot. Gaz. 60: 412, 413. 18 N YOK. 
Cook, M. T., & Wilson, G. W. The influence of the tannin content a 
the nae plant on Endothia parasitica and related species. Bot. 
Gaz. 60: 346-361. 15 N IQI5. a 
Coville, F. V. Grossularia marcescens. Proc. Biol. Soc. Washington 
28: 181. 29 N 1915. 
Earle, F.S., & Popenoe, W. Plant breeding in Cuba. Jour. Heredity 
6: 558-568. f. ro-15. 26 N 1915. 
»P. Some Porto Rican parasitic fungi. Mycologia 7:.333-34 40. 
bl. 171. N 1915. ; 
Includes nine new species in Septoria (5), Dimerium (3), and Phyllachora (1)- 
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