f 



1902] BOTANICAL GAZETTE 159 



The following papers were read before section G of the A. A. A. S. at 

 the recent Pittsburg meeting : John M. Bates, The finding of Piiccviia phrag- 



^ )niti$ (Schum.) Korn. in Nebraska; Charles E. Bessey, An instance of a 



change in the native flora, Note on the fuel value of cottunwood ; Charles 

 J. Chamberlain, The origin of the achromatic figure in PeHia; Mel T. 

 Cook, Comparison of the development of the embryo sac and embryo of 

 Clayto7iia Virgbiica and Agroste7n?na Githago ; John M. Coulter, Special 

 haustorial apparatus in connection with the embryo sac of angiosperms ; 

 Edwin B. Copeland, The ascent of the transpiration stream, Chemical 

 stimulation and the evolution of carbon dioxid ; J. W. T. Duvel, Conditions 

 influencing the vitality and germination of seeds; H. A. Hakdixg and F. C. 

 Stewart, A bacterial soft rot of certain cruciferous plants and Ainorpho- 

 phallus simenst% a preliminary report; George G. Hedgcock, The preva- 

 lence of Alternaria in Nebraska and Colorado during the drought of 1901 ; 

 A. S. Hitchcock, Notes on Agrostis; Marshall A. Howe, A note on tlie 

 vitality of the spores of Marsilea ; Henry Kraemer, The pith cells of 

 Phytolacca decandra ; D. T, MacDougal, Soil temperatures and vegetation ; 

 J. B. S. Norton, Sclerotinia fructigena ; George J. Peirce, Some neglected 



* factors in discussions of heredity; Charles L. Pollard, Features of the 



flora of Cuba; Fkank W. Rane, Effect of acetylene gas-light on plant 

 growth, plant environment, and plant diseases; Hermann von Schrenk, 

 Notes on diseases of western Coniferae ; August D, Selbv, A disease of 



t potato stems in Ohio due to Rhizoctonia; C. L. Shear, Arachnioiiis tracJiy- 



spermiis, a new species of the Gymnoascaiceae ; F, L. Stevens, Studies in 

 Phycomycete {^r\\X\z-Si\\ovi^ Sclerospora gramnicola [^z.zz^\ F. L. Stewart, 

 The absorption of water; a function of the ligule and stipulaceous tissue of 

 the grasses ; E. Mead Wilcox, A review and criticism of the botanical cur- 



riculum of some of our colleges and universities, from the student's stand- 

 puuit. The officers elected for the ensuing year are: F. V. Coville, vice- 

 preside7it ; C, J. Chamberlain, secretary. 



The following papers were read before the Botanical Society of 

 America at the recent Pittsburg meeting: Mrs. E. G. r3RiTTON, Studies ot\ 

 reproduction by gemmae of the prothallus of ferns, The genus Sematophyllum 

 (Raphidostegium), The North American species of Trichomanes; N. L. 

 Britton, Studies in Cyperus and other Cyperaceae; W. A. Cannon, Matu- 

 ration divisions in the pollen cells of hybrid cottons (by invitation) ; J. M. 

 Coulter, The relations of the botanical associations of the country. Par- 

 thenogenesis in seed plants; H. C. Cowles, Suggestions for ecological car- 

 tography, A comparative study of the sand dunes of the ocean and lake shore 

 (illustrated); B. D. Halsted (address of past president). Two centuries of 

 American botany; A. S. Hitchcock, North American species of Leptochloa ; 

 Arthur Hollick, Fossil ferns from the Laramie group of Florence, Colorado, 



