1921] BALL—WILLOWS 231 
the vicinity of Red Bluff. It is most abundantly distributed in the valleys, 
having an elevation of only 0-200 ft., but ascends the foothills streams to 
1500 ft. or more. The specimens listed later are referred to this species. The 
arrangement is from east and south to west and north. According to 
SCHNEIDER, this species is found as far east as the Rio Grande Valley in south 
central New Mexico and in the Davis Mountains of southwest Texas. The 
material from those districts is discussed later. 
EW MeExico.—Grant County, Dog Spring, EZ. A. Mearns 183 (tree 25 ft. 
high, 1 ft. in diam.), May 29, 190 (3?) (N); Dog Spring, Dog Mountains, 
Mearns 2419, September 22, 1903 pu tree 20 ft. high, Emory Spring, at foot 
of Emory Peak, Mearns 277, June 4, 1902, (N); near Kingston, in meadows, 
at 6600 ft. elevation, O. B. Metcalfe oS 1904 (N); Mangas Springs, 18 miles 
northwest of Silver City, alt. 4770 ft., Meicalfe, ee 26, 1903 (N); Gila, 
alt. 4200 - E. A. Goldman 1561, October 9, 1908 (N 
Arizona.—Graham County, Sierra Bonita Ranch, 23 nantes north of Willcox, 
R.A. pr 1904 (B); Duncan, J. N. Rose 11737, April 1908 (N); Cochise 
County, Ft. Huachuca, Dr. Edward Palmer 452, April 26-May 21, 1890 (N); 
Dr. Patzky (?), 1890 (N); T. E. Wilcox 1894 (N); Chiricahua Mountains, 
Joe Smith’s Ranch, alt. 5500 ft., J. C. Blumer 2306, November 22, 1906 (B); 
Bonita Canyon, alt. 6500 ft., Blasi mer 2300, Miah 4, 1906 (B); Santa Cruz 
County, Nogales, J. Tilston: March 28, 1908 (B): near Santa Cruz River, 
east of Nogales, Tidestrom 743, March 30, 1908 (B): Sonaita Creek, 
Patagonia, F. M. Chamberlain 5, April 2, 1904 (N); in creek bed at Patagonia, 
Tidestrom 814, April 10, 1908; Calabases, common in bottom lands, Tidestrom 
870, April 21, 1908 (B), same locality, Tidestrom 886, April 24, 1908(B); Pima 
County, Canoa to Arabaca (Arivaca) D. Griffiths 3667, March 13-April 23, 
1903 (N); Tucson, Mearns 178 (2658) November 21, 1893 (N); J. J. Toumey, 
April 13, May 20, 1894 (N); March, May 16, 1896 (N); Myrile Zuck, May 16, 
1896 (N); G. R. Vasey 266, March 1881 (N); J. N. Rose 11767, April 16, 1908 
(N); Rose, Standley, and Russell 15192, April 27, 1910 (N); Blumer B 16, 
alt. 2400 ft., April 15, 1907 (B); Santa Cruz River, near Tucson, Blumer B 
16a, May ro, 1907 (B.N,); Santa Catalina Mountains, alt. 3000 ft., Blumer 
B 17, April 25, 1907 (B.N,); Santa Rita Mountains, Andrade, Griffiths 4079, 
April 18, 1903 (B.N.); Pinal County, near Dudleyville, Griffiths 3666, March 
13-April 23, 1903 (N); Yuma County, Yuma, State Experiment Substation, 
C. R. Ball 1740, 1741, June 15, 1911 (B,N); Ball 1901, May 26, 1915 (B,N); 
Mohave County, Topock, abundant along Colorado River, alt. 600 ft., EZ. A. 
Goldman 2970, September 27,1917 (N); Beaverdam, alt. 1800 ft., M. E. Jones 
5020, April 5, 1894 (N); Littlefield, near petrified springs, J. Tidestrom 9236, 
April 29, 1919 (B); at spring 8 miles above Pierce’s Ferry, alt. 1700 ft., Jones 
5077u, April 18, 1894 (N); locality unknown, Fremont’s Expedition to Cali- 
fornia, no. 202 (A), 1845 (N), has “Utah” written on label, but “Ariz.” added 
by same hand that added number and date; Beaver Creek, B. E. Fernow, 
August 1896 (N) 
