208 INDEX TO AMERICAN BOTANICAL LITERATURE 
Barss, H. P. Bean blight and bean mosaic. Oregon Crop Pest & 
_ Hort. Rep. 3: 192-196. f. 56-59. 10 Ja 1921. 
Barss, H. P. Cylindrosporium leaf-spot of prune and cherry. Oregon 
Crop Pest and Hort. Rep. 3: 156-158. f. 42, 43. 10 Ja 1921. 
Barss, H. P. Physiological disorders of developing fruits. Oregon 
Crop Pest & Hort. Rep. 3: 159-166. f. 44-47. 10 Ja 1921. 
Bartlett, H. H. The manufacture of sugar from Arenga saccharifera 
in Asahan, on the east coast of Sumatra. Ann. Rep. Michigan 
Acad. Sci. 21: 155-165. pl. 3-6. Jl 1920. 
Bessey, E.A. Guide to the literature for the identification of fungi—a 
2 preliminary outline for students and others. Ann. Rep. Michigan 
Acad. Sci. 21: 287-316. Jl 1920. 
Bessey, E. A. The effect of parasitism upon the parasite—a study in 
phylogeny. Ann. Rep. Michigan Acad. Sci. 21: 317-320. Jl 1920. 
Blake, S.F. Five new species of Cedrela. Proc. Biol. Soc. Washington 
33: 107-111. 30 D. 1920. 
Blake, S. F. Revision of Ichthyomethia, a genus of: plants used for 
poisoning fish. Jour. Washington Acad. Sci. 9: 241-252. 4 My 
1919. 
Includes 2 new species from Tropical America. " 
Blake, S. F. New trees and shrubs from Mexico and Guatemala. 
Proc. Biol. Soc. Washington 33: 117-120. 30 D 1920. 
Species of Capparis (1), Jatropha (1), Guarea (1), and Russelia (2). 
Blake, S. F. Two new salvias from Guatemala. Proc. Biol. Soc. 
Washington 33: 113-115. 30 D 1920. 
Blakeslee, A. F. Mutation in mucors. Jour. Hered. 11: 278-284. 
js 20-28. & F igat. 
Bouyoucos, G. J., & McCool, M. M. Measurement of the amount of 
water that seeds cause to become unfree and their water-soluble 
material. Jour. Agr. Research 20: 587-593. 3 Ja 1921. 
Bradshaw, R. V. A new Oregon Eucephalus. Torreya 20: 122, 123. 
5 F 1921. 
Eucephalus vialis sp. nov. 
Brandegee, T. S. Plantae Mexicanae. Purpusianae, “X. Univ. Cali- 
_ fornia Publ. Bot. 7: 325-331. 29 D 1920. 
Includes Pachystelma gen.nov., and new species in 17 other genera. 
Breazeale, J. F.,. & Briggs, L. J. Concentration of potassium in ortho- 
clase solutions not a measure of its availability to wheat seedlings. 
Jour. Agr. Research 20: 615-621. 15 Ja 1921. 
