250 



» 

 The plant seems distinct and may be designated and described 

 as 



Proserpinaca intermedia 



■^ Glabrous, the stems decumbent at base, rooting, about 3 dm. 

 high, simple or somewhat branched. Leaves of two kinds ; blades 

 of submerged ones pectinate-pinnatifid, divided to the rachis; 

 blades of emersed ones oblong-lanceolate, pectinate, the stiff 

 segments entire, acute, the central part of blade one-third of its 

 width; flowers sessile in axils of emersed leaves, one to few to- 

 gether; sepals triangular, acute, convergent; fruit 4 mm. long 

 and about as wide, sharply angled, the faces flat or slightly con- 

 cave, wrinkled or rugose. 



Specimens examined : 



New Jersey. Boggy soil along Pennsylvania right of way 

 about half way between Barnegat Pier and Island Heights 

 Junction, Ocean County, Mackenzie 2890, Sept. 1907 (type in 

 Herb. K. K. Mackenzie; duplicates will be deposited in Herb, 

 N. Y. Bot. Garden and Gray Herbarium) ; 



Georgia. Wet pine barrens east of Douglass, Coffee County. 

 Harper 1527, July 19, 1902; in small branch swamps in pine- 

 barrens near Fitzgerald, Irwin County, Harper 2210, May 18, 

 1904. 



Kenneth K. Mackenzie 



REVIEWS. 



Osborne's Vegetable Proteins* 



Dr. Osborne has done a great service to chemists and to those 

 interested in the chemistry of plants by the publication of this 

 monograph upon the proteins of vegetable origin. This subject 

 has been his life-work and surely there is no one, here or abroad, 

 better qualified to write upon it. The proof of this is the fact 

 that the book is largely an outline of his own work and con- 

 clusions. Df^ Osborne treats first of the general characteristics 

 of these proteins, the manner of preparation, their general physi- 

 cal and chemical properties, their decomposition products, and 

 their classification. The last chapter is exceedingly interesting, 



*Osborne, Thomas B. The Vegetable Proteins. Pp. 125. Longmans, Green, 

 & Co., London and New York. 1909. 



