low : A revision of the species of Picea occurring in northeastern America. 

 — Edward Lee Greene : Bibliographie difficultés. — William Fawcett : 

 The botanic Gardens of Jamaica. — Herbert J. Webber : Researches upon 

 Zamia. 



Communications présentées à la section G de t'A. A. A. S. pendant le 

 Congrès tenu à Détroit en i8pj (résumées dans la Botanic al Gazette, 

 Vol. XXIV, n° 3). 



Charles A. Davis : Trillium grandiflorum (Michx) Salisb., its variations 

 normal and teratological. — E. J. Durand : A discussion of the structural 

 characters of the order Pezizineae of Schroeter {le titre seulement). — 

 K. M. Wiegand : The taxonomic value of fruit characters in the genus Ga- 

 liuni. — Charles E. Bessey : Report upon the progress of the botanical 

 survey of Nebraska. — Albert F. Woods : Bacteriosis of carnations. — 

 Erwin F. Smith : Wakker's Hyacinth Bacterium. — Charles E. Bessey : Are 

 the trees receding from the Nebraska plains? — C. A. Peters : Reproduc- 

 tive organs and embryology of Drosera. — J. 0. Schlotterbeck : Deve- 

 lopment of some seedcoats. — J. H. Schuette : Contributions on wild and 

 cultived Roses of Wisconsin and bordering states {le titre seulement). — 

 Fanny E. Langdon : Development of the pollen of Asclepias Cornuti. — 

 Charles E. Bessey : Some characteristics of the foothill végétation of wes- 

 tern Nebraska. — H. F. Osborn and E. B. Poulton : Organic sélection. — 

 James B. Pollack : Mechanism of root curvature. — Frederick C. New- 

 combe : Cellulose ferment. — Bodney H. True and C. G. Hunkel : The 

 toxic action of phénols on plants. — Charles Porter Hart : 1s the charac- 

 teristic acridity of certain species of the Arum family a mechanical or a 

 physiological property or effect? — W. J. Beal : How plants flee from 

 their enemies. — Alex. P. Auderson : Comparative anatomy of the normal 

 and diseased organs of Abies balsamea affected with Mcidium elatinum. — 

 Alex. P. Anderson : On a new improved self-registering balance {le titre 

 seulement). — Charles 0. Townsend : The corrélation ofgrowth under the 

 influence of injuries. — W. W. Rowlee and K. M. Wiegand: The botanical 

 collection of the Cornell Arctic Expédition of 1896 {le titre seulement). — 

 Erwin F. Smith : Description of Bacillus Phaseoli n. sp. — Erwin 

 F. Smith : On the nature of certain pigments produced by Fuugi and Bac- 

 teria, with spécial référence to that produced by Bacillus Solanacearum. 



Pans ' " rsrh, imp '1 ,.\v de Chàlillon. 



