INDEX TO AMERICAN BOTANICAL LITERATURE 309 
Bruner, S. C. Lista preliminar de las enfermedades de las plantas de 
importancia economica para Cuba. In Calvino, N., Informe de las 
anos 1918-1919 y 1919-1920 de la Estacion Experimental Agrono- 
mica, 723-763. 1920. [Illust.] 
Bryan, M.K. A bacterial budrot of cannas. Jour. Agr. Research 21: 
143-152. pl. 31-38. 2 My 1921. ; 
Caused by Bacterium Cannae sp. nov. 
Buckner, G. D. Comparative utilization of the mineral constituents 
in the cotyledons of bean seedlings grown in soil and in distilled 
water. Jour. Agr. Research 20: 875-880. 1 Mr 1921. 
Burgeff, H. Sexualitat und Parasitismus bei Mucorineen. Ber. 
Deutsch. Bot. Ges. 38: 318-327. f. 1. 12 Ja 1921. 
Burger, O. F. Variations in Colletotrichum gloeosporioides. Jour. 
Agr. Research 20: 723-736. pl. 86 +f, 2, 2. 4 F 1921. 
Burger, O. F., & Swain, A. F. Observations on a fungus enemy of the 
walnut aphis in southern California. Jour. Econ. Entom. 11: 278- 
288. pl. 9. 1918. 
Burkholder, W. H. The bacterial blight of the bean: a systematic 
disease. Phytopathology 11: 61-69. F 1921. 
Burnham, S. H., & Latham, R. A. The flora of the town of Southold, 
Long Island, and Gardiner’s Island. Torreya 21: I-11, 28-33. 
1921. 
Includes a new variety of Nabalus trifoliolatus. 
Bush, B. F. Some species of Podostemum. Am. Mid. Nat. 7: 29-41. 
Mr i021. 
Calvino, M. Informe de los afios 1918-1919 y 1919-1920 de la Estacion 
Experimental Agronomica (Santiago de las Vegas, Cuba). Pp. 
1-786. Habana, 1920. [Illust.] 
Contains much information concerning economic plants. 
Campbell, D. H. The Eusporangiatae. The comparative morphology 
of the Ophioglossaceae and Marattiaceae. Carnegie Instit. Wash- 
ington Publ. 140: 1-229. pl. 1-13 +f. 1-192. 29 Au Igor. 
Cannon, W. A. Botanical features of the Algerian Sahara. Carnegie 
. Instit. Washington Publ. 178: 1-81. I. 1-36. 6 Au 1913. 
Cannon, W. A. The root habits of desert plants. Carnegie Instit. 
Washington Publ. 131: 1-96. pl. 1-23 + f. I-I7- 28 Mr rgtt. 
Cannon, W.A. The topography of the chlorophyll apparatus in desert 
plants. Carnegie Instit. Washington Publ. 98: 1-42. pl. 1-5 +f. I- 
I5. 1908. 
