386 INDEX TO AMERICAN BOTANICAL LITERATURE 
Urban, I. Olacaceae. Symb. Antill. 5: 177-187. 20 My 1907. 
Includes descriptions of 3 new species of Schoepfia. 
Van Tieghem, P. Supplément aux Ochnacées suivi d’une table alpha- 
bétique des genres et espéces qui composent actuellement cette famille. 
Ann, Sci. Nat. Bot. IX. 5: 157-192. 1907. 
Contains an of plants belonging to this family from Martinique, beet and 
French Guian 
Vinson, A. z. The function of invertase in the formation of cane and 
invert sugar dates. Bot. Gaz. 43: 393-407. 17 Je 1907. 
Weingart, W. Cereus xanthocarpus K. Schum. Monats. Kakteenk. 
17: 65-67. 15 My 1907. 
Native of Paraguay. 
Wercklé, C. Eine interessante Rfipsalis-Art aus Costarica. Monats. 
Kakteenk. 17: 71, 72. 15 My 1907. 
Williamson, E. B. A collecting trip north of Sault Ste. Marie, On- 
tario. Ohio Nat. 7: 129-148. 15 My 1907. 
Contains a list of plants collected at Searchmont and Hayden, New Ontario. 
Wilson, A.D. Some common weeds and their eradication. Ann. Rep. 
Agric. Exp. Sta. Univ. Minn. 14: 195-237. f. 164-188. 1907. 
Wright, R. R. The plankton of eastern Nova Scotia waters. An ac- 
count of floating organisms upon which young food-fishes mainly 
subsist. Further Contrib. Can. Biol. 1902-1905: 1-19. fl. I-7- 
1907. 
