20 THE TLANT WORLD. 



M. A. Chrysler, " Tyloses in the Tracheids of Conifers." 



E. J. Durand. " The Origin of the Hymenium in some Geoglossaceas." 

 C. R. Ball, " The Botanical Histor\', Classification and Uses of Sorghum." 

 W. A. Orton, " The Plant Disease Survey of the United States." 



J. H. White, " Polystely in the Orchidacese." 



Conctirrently with the meetings of Section G, the Botanical 

 Society of America held meetings at which the following papers 

 were presented : 



R. A. Harper, Figures Produced by Protoplasmic Streaming in Fungi 

 and Slime ]\Ioulds. " The Organization of Certain Coenobic Plants." 

 (Lantern.) 



C. R. Barnes and W. J. G. Land, " The Origin of Air-Chambers in 

 Liverworts." 



R. R. Gates, " Cytological Studies on CEnothcra lata dc Vries and its 

 Hybrids." 



W. J. G. Land, " Fertilization and Embryogeny of Ephedra irifurca 

 Torr." 



C. J. Chamberlain, " A Field Study of Diooii and Ccratocamia." 



G. T. Moore, " The Genus Pleurococcus, Culturally Considered." 



T. E. Hazen, " The Early Growth of Monostroina." 



B. M. Davis, " Spore Formation in Dcrbcsia." 



A. F. Blakeslee, " Sexuality in the Genus Mucor." 



J. C. Arthur, " Cultures of L'redinere in 1906." 



G. P. Clinton, " Pcridcrmiuiii acicoluui the Aecial Stage of Colcosporiiim 

 solidagiuis." 



G. R. Lyman, " Culture-studies on the Polj'morphism of Hymenomyce- 

 tes." By invitation. 



C. L. Shear and Anna K. Wood, " Ascigerous Forms of Glocosporiitm 

 and CoUetotrichum." 



F. L. Stevens, " A New Chrysanthemum Disease : the Ray-rot." 

 Bruce Fink, " A Bibliography of North American Lichenology." 

 Elizabeth G. Britton and Arthur Hollick, " A New Fossil ^NIoss from 



Florissant, Colorado." 



Arthur Hollick and E. C. Jeffrey, " Recent Identifications of Cretaceous 



Gymnosperms from Kreischerville, N. Y." 



H. von Schrenk, " Some Changes in Wood Fiber Immersed in Water." 

 E. C. Jeffrey, " Some Vestigial Characters in the Cone of Pines." 



A. S. Hitchcock, " Classification of the Genus Panicuni." 



One meeting was held at the ^Inseum of the New York Bo- 

 tanical Garden, at Bronx Park, and was followed by a luncheon 

 in the laboratories. The following addresses were given : 



C. H. Shaw, "The Teaching of the Subject of Respiration." 



B. E. Livingston, " Relative Transpiration in Cacti." 



J. W. Harshberger, " The Water-storing Tubers of Ncphrolcpis cordi- 

 fuUa:' 



