TABLE OF CONTENTS: 
Rose Americans, I, , ; : : ‘ . francois Crépin 
The development of the cystocarp of Griffithsia Bornetiana. Plates 
and II una Arma Smith 
New Mosses of North America. VI. Plates 111~v. 
fF. Renauld and /. Cardot 
On the toxic action of dissolved salts and their electrolytic dissociation 
Louis Kahlenberg and Rodney H. True 
On the toxic effect of dilute solutions of acids and salts upon plants. 
Plate vii ; : : ; ; : . Fred D. Heald 
Flowers and insects. XVII. : : ; . Charles Robertson 
Botanical opportunity . : ‘ ' ; . William Trelease 
Botanical papers at Buffalo: 
Botanical Society of America. 
Section G of the Amer. Assoc. Adv. Sci, ‘ 
Botanical Club of the Amer. Assoc. Adv. Sci. 
The Phalloidez of the United States. I. Development of the recep- 
taculum of Clathrus columnatus. Plates x1 and xu 
Edward A. Burt 
Mechanism of movement and transmission of yess in Mimosa and 
other sensitive plants. Plate x1  . D. T. MacDougal 
The morphology and oe of certain pyrenomycetous fungi. 
Plates XIV—xvI ‘ ; : ‘ . Mary A. Nichols 
Development of the procarp and cystocarp in the genus Ptilota. 
Plates xvur and x1x 2 ‘ : . Bradley M. Davis 
The Phalloidez of the United States. I]. Systematic account 
dward A. Burt 
Salix cordata X sericea ; ‘ : . NN. M. Glatfelter 
A rust and leaf casting of pine leaves. Plates xx1I and XxItt 
B. T. Galloway 
The philosophy of species-making : : ; <> ih. FL. Hatley 
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