NOTES ON NORTH AMERICAN WILLOWS. III 
CARLETON R. BALL 
The first’ of a projected series of papers under this title was 
published in this journal in November 1905. Since that date, the 
writer’s contributions on Salices have been confined to treatment 
of the genus for two floras covering widely different sections of the 
country, namely, the Rocky Mountains? and the Central Atlantic 
states.3 In the ten-year period, however, thousands of specimens 
have been determined for collectors and herbaria, extensive field 
studies and collections have been made, and a considerable fund 
of data accumulated, some of which are presented in the third 
paper? of this series and in the following paragraphs. 
1. The willows of the Black Hills 
The first list of the plants of this district, of which the writer 
has knowledge, was published by RyDBERGS in 1896. He collected 
at some 20 points in the Black Hills, during the period from May 27 
to August 18, 1892, visiting some places twice. Four species of 
Salix are recorded (p. 523): S. fluviatilis Nutt., S. cordata Muhl., 
S. discolor Muhl., and S. Bebbiana Sarg. Of these, S. fluviatilis is 
listed only from Rochford; S. cordata only from Custer and Lead; 
S. discolor only from Custer; while S. Bebbiana was collected at 
5 points. No data on frequency of occurrence are given for the 
willows, though such notes are given commonly throughout the 
paper. It is probable, however, that the three species first named 
were met with at points other than where collections were made. 
ALL, CARLETON R., Notes on North American willows. I. Bor. Gaz. 
40:376-380. pls. 12, 13. 1905. 
> , Salix in Courter and Netson, New Manual Rocky Mt. Bot. pp. 128- 
139- 1909. 
3 
, Salix in Trpestrom, Elysium Marianum 3:19-37. pls. 4-9. 1910. 
, Notes on North American willows. II. Bor. Gaz. 60:45-54. figs. 3. 
4 
IQts. 
R RG, P. A., Flora of the Black Hills of South Dakota. Contrib. U.S. 
Nat. Herb. 3:463~536. 1896. 
391] [Botanical Gazette, vol. 60 
