29 



163) Notes on American Willows V, The Species of 



the Pleonandrce Group, in Journal of the 

 Arnold Arboretum I, no. 1, p. 1-32 (1919). 



164) Notes on American Willows VI, a. The Species 



of the Section Phylicifolice ; b. The Species 

 of Section Sitchenses ; c. Section Brewerianm 

 in Journal of the Arnold Arboretum I, no. 

 2, p. 67-97 (1919). 



165) Notes on American Willows VII. a. The 



Species of the Section AdenophyUm. b. Sect. 

 Balsamiferce in Journal of the Arnold 

 Arboretum I, no. 3, p. 147-171 (1920). 



166) Notes on American Willows VIII. a. The 



Species of the Section Chrysanthece. b. Sect. 

 Candida in Journal of the Arnold Arbore- 

 tum I, no. 4, p. 211-232 (1920). 



167) Notes on American Willows IX. a. The Species 



of the Section Discolores. b. The Species of 

 the Section Grisece in Journal of the Arnold 

 Arboretum II, no. 1, p. 1-25 (1920). 



168) Notes on American Willows X. a. The Species 



of Section Fulvw. a. The Species of Section 

 Rosea in Journal of the Arnold Arboretum 

 II, no. 2, p. 65-90 (1920). 



169) Notes on American Willows XI. a. Some 



Remarks on the Species of Section Cordatce. 

 b. Some Remarks on the Geographical Dis- 

 tribution of the American Willows, in 

 Journal of the Arnold Arboretum II, no. 4, 

 p. 185-204 (1921). 



170) Notes on American Willows XII. a. Systematic 



Enumeration of the Sections, Species, Varie- 

 ties, and forms of American Willows, b. Some 

 Remarks on the hybrids hitherto observed 

 among the American Willows, c. Some Re- 

 marks on the Geographical distribution of 

 the American Willows, d. Analytical Keys to 

 the Species of American Willows, e. Names 

 applied to American Willows, but not men- 



