1917] AGRICULTURAL BOTANY. 819 



The data obtained relative to ttie life history of the different forage species 

 are said to have made possible the adoption of what is known as the deferred 

 or rotation grazing system in this forest. 



Tables are presented giving the soil moisture requirements, time of flower- 

 stalk production, time of seed maturity, and seed viability of the different 

 species investigated. 



Inventory of seeds and plants imported by the Office of Foreign Seed and 

 Plant Introduction during the period from January 1 to March 31, 1914 

 {U. S. Dept. Agr., Bur. Plant Indus. Inventory No. 38 (1911), pp. 105, pis. 10).— 

 This inventory includes importations of about 700 lots of seeds and plants. 



Inventory of seeds and plants imported by the Office of Foreign Seed and 

 Plant Introduction during the period from April 1 to June 30, 1914 (U. S. 

 Dept. Agr., Bur. Plant Indus. Inventory No. 39 (1917), pp. 183, pis. 10).— A list 

 is given, together with economic notes, on about 1,000 importations of seeds and 

 plants. 



Inventory of seeds and plants imported by the Office of Foreign Seed and 

 Plant Introduction during the period from July 1 to September 30, 1914 

 (U. S. Dept. Agr., Bur. Plant Indus. Inventory No. 40 (1911), pp. 110, pis. 10).— 

 This gives accounts of about 640 introductions, most of the material having 

 been received from China, India, and Brazil. 



New or noteworthy plants from Colombia and Central America, VI, H. 

 PiTTiER (U. S. Nat. Mus., Contrib. Nat. Herbarium, 18 (1917), pt. 6, pp. 225- 

 259+X, pi. 1, figs. 7). — This paper is a continuation of a series of studies by 

 the author on the flora of Colombia and Central America (E. S. R., 34, p. 827). 



The Middle American species of Lonchocarpus, H. Pittier (U. S. Nat. Mus., 

 Contrib. Nat. Herbarium, 20 (1917), pt. 2, pp. 37-93+X, pis. 6, figs. 43}.— A 

 description is given of the species of Lonchocarpus known to occur in Central 

 America and Mexico. 



The families and genera of the bacteria, C. B. A. Winslow, Jean Broad- 

 HURST, R. E. Buchanan, C. Krumwiede, je., L. A. Rogers, and G. H. Smith 

 (Jour. Bact., 2 (1917), No. 5, pp. 505-566). — A preliminary report is given of the 

 committee of the Society of American Bacteriologists appointed to consider the 

 characterization and classification of bacterial types. An outline of the families 

 and genera of bacteria is presented. The committee proposes the recognition 

 of four orders of Schizomycetes, the Eubacteriales embracing 8 families and 31 

 genera. The adoption is recommended of the principles of the so-called Vienna 

 Code of Botanical Nomenclature, with the exception of the requirement of Latin 

 descriptions. It is also recommended that the date of publication of the third 

 edition of Zopf's Spaltpilze be taken as the date for the beginning of bacterio- 

 logical nomenclature in determining priority, except for a list of genera con- 

 servanda to be adopted by the society at its 1918 meeting. 



Is symbiosis possible between legume bacteria and nonlegume plants? 

 T. J. Burrill and R. Hansen (Illinois Sta. Bui. 202 (1917), pp. 113-181, pis. 

 10, figs. 8; abs., pp. 4. fiff- 1)- — This bulletin gives an account of investigations 

 on legume bacteria and an attempt to develop symbiosis between legume bac- 

 teria and nonlegume plants similar to that which exists between Pseudomonas 

 radicicola and leguminous plants. 



Studies preliminary to the attempt to develop strains of bacteria that would 

 exist in symbiosis with nonlegume plants showed that the nodule bacteria taken 

 from the roots of leguminous plants may be divided into 11 groups according 

 to the host plants to which they have become specifically adapted. By means 

 of cultures, the authors have been able to isolate P. radicicola from all of the 

 subfamilies of Leguminosse, and while the various nodule bacteria exhibit sero- 



