f>2 JOURNAL OF THE ARNOLD ARBORETUM [vol. hi 



new sections for those species which show good characters. I can only- 

 repeat what I said in the introduction to note ix (1. c. n. 1), that I desire 

 to induce as many students as possible to take a keen interest in the 

 study of American Willows, and to point out the defects of our present 

 knowledge in regard to them. 



In the following enumeration I shall add a few corrections and new 

 observations. I shall also include the full synonymy of all these species 

 and forms dealt with by me in the Botanical Gazette, without repeating 

 here the exact quotations indicating only the place where they are found. 1 



Sect. I. Nighae Loudon. — See Schneider in Bot. Gaz. lxv. 5 and in 

 this Jour. I. 5. 



1. S. Humboldtiana Willdenow. — S. magellanica Poiret. — S. falcata 

 Kunth. — S. Humboldtiana** S. falcata Andersson. — S. Humboldtiana fal- 

 cata Andersson. — S. chilensis Morong & Britton, not Molina. — See 

 Schneider in Bot. Gaz. lxv. 6, and in this Jour. i. 5. 



la. S. Humboldtiana f. fastigiata Andre in Rev. Hort. lxviii. 177, 

 f. 58-60 (1896). 



lb. S. Humboldtiana var. stipulacea Schneider. — S. Houstoniana 

 Pursh, pro parte. — S. stipulacea Martens & Galeotti. — S. oxyphylla 

 Kunth. — S. Humboldtiana ***S. oxypkyUa Andersson, pro parte. — S. Hum- 

 boldtiana y oxyphyUa Andersson, pro parte. — S. Humboldtiana Martens & 

 Galeotti. — See Schneider in Bot. Gaz. lxv. 7, and in this Jour. I. 5. 



lc. S. Humboldtiana var. Martiana Andersson. — S. Martiana Ley- 

 bold.- — S. Humboldtiana * S. Martiana Andersson. — See Schneider in Bot. 

 Gaz. lxv. 8, and in this Jour. I. 5. 



2. S. nigra Marshall. — See Schneider in this Jour. i. 5. — To the syn- 

 onyms may be added with ? S. dubia Trautvettcr in Mem. Sav. Etr. 

 Acad. St.-Petersb. in. 626 (Salict.) (1837). This is nothing but a new 

 name for S. ambicjua Pursh on account of the older name S. ambigiia of 

 Ehrhart. Pursh's name had already been changed by Sprengel. 



2b. S. nigra var. altissima Sargent. — See Schneider in this Jour. i. 



2c. S. nigra var. Lindheimerii Schneider. — S. Humboldtiana y oxyphylla 

 Andersson, pro parte. — S. nigra Mackensen. — S. Wrightii Sargent, pro 

 parte. — S. Humboldtiana Blankinship. — See Schneider in Bot. Gaz. 

 lxv. 9 and in this Jour. I. 8. 



3. S. Gooddingii Ball. — S. nigra Bebb, pro parte. — S. nigra var. valli- 

 cola Dudley. — S. vallicola Britton. — S. Wrightii Wooton & Standley, pro 

 parte. — See Schneider in Bot. Gaz. lxv. 12, and in this Jour. I. !). — Ball 

 in Bot. Gaz. LXXII, ^27, fig. 2-4 (1921). 



Sect. II. Triandrae Dumortier. — Sect. Amygdalinae Koch, pro parte. 

 — See Schneider in Bot. Gaz. lxv 13, and in this Jour. i. f). 



1 After we had received from Mr. Schneider part XII of his Notes on American 



Willows two papers on American Willows by Mr. Ball have appeared in The Botanici 

 Gazette 4 ; the new names published there have been inserted in this enumeration to 



make it as far as possible a complete account of all American Willows known to the 



end of 1921.— Ed. 



