192 MISCELLANEOUS CIRCULAE 92, U. S. DEPT. OF AGRICULTURE 



Aoer negundo violaceum Kirchner. 24 Boxelder. 



Range. — From western Massachusetts it ranges through New York to Ohio, 

 northern Wisconsin, Minnesota, Iowa, South Dakota, North Dakota (Golden 

 Valley County), Idaho (Nez Perce County), occurring also in Missouri. 



NAME IN USE 



Boxelder 



Acer negundo texanum Pax. 25 Boxelder. 



Range. — Southwestern and western Missouri (Jackson County), southeastern 

 Kansas, throughout Arkansas and western Oklahoma to southeastern Texas (San 

 Antonio River). 



NAME IN USE 



Boxelder 



Acer negundo interius (Britton) Sargent. 26 Boxelder. 



Range. — From Manitoba, Saskatchewan, and Alberta southward in Mon- 

 tana, Wyoming, Colorado, Utah, New Mexico, and Arizona (Santa Catalina, 

 Santa Rita, Huachuca, and Chiricahua Mountains). 



NAMES IN USE 



Rocky Mountain Boxelder. Boxelder. 



Acer negundo arizonicum Sargent. Boxelder. 



Range. — New Mexico (Socorro County, at Glen wood, 7 miles south of Alma, 

 and at the Kelley Ranch, 7 miles north of Alma) ; Arizona (east side of Chirica- 

 hua Mountains, in Cave Creek Canyon; Coconino County, in Oak Creek Canyon; 

 in Sycamore Canyon, near Flagstaff; Mount Kellogg, in Santa Catalina Moun- 

 tains) . 



Note on nomenclature. — Not previously differentiated from the species. 



name in use 

 Boxelder 



Acer negundo californicum (Torrey & Gray) Sargent. 27 



California Boxelder. 



Range. — California (from the lower Sacramento River to San Bernardino 

 Count}') . 



NAMES IN USE 



California Boxelder (lit.). False Maple (Calif.). 



Boxelder (Calif.). Cut-leaf Maple (Calif.). 



Maple (Calif.). 



34 Formerly included as a form only of the species. Originally described under its present name in 1804. 

 In 1911 it was characterized as Rulac Nuttallii Nieuwland, and in 1913, as Negundo NuHallii Rydberg. 



" Originally described under its present name in 1885, but quite generally it was still held to be only a 

 form of the species. In 1903, it was characterized as Rulac Texana (Pax) Small (Flor. S. E. U. S., 743, 1903), 

 based on Acer Texanum Pax, and in 1913 it was named Negundo Texanum (Pax?) Rydberg, although in 

 1917 the latter author (Flor. Rky. Mts. and Adj. PL, 553, i9l7) appears to have abandoned this species. 

 Acer negundo var. latifolium Pax (1890) has been characterized as a form of this variety under the name 

 Acer negundo var. Texanum forma latifolium Sargent, which is said to occu rin eastern Texas, southern 

 Arkansas, Louisiana, eastern Mississippi (Black River), Tennessee (near Nashville), North Carolina 

 (Cataba River near Marion), Virginia, and southern Ohio. 



38 Not differentiated from the species until 1908, when it was described as Acer interior Britton (Britton 

 and Shafer, North Am. Trees, 655. 1908). In 1911, it was named Rulac interior (Britton) Nieuwland, and 

 in 1913, Negundo interius (Britton) Rydberg. C. S. Sargent (Bot. Gaz., LXVII, 239, 1919) doubtfully 

 refers Acer Kingii Britton (Opus cit., G56), based on specimens collected in the Wasatch Mountain, Utah, 

 in August, 1869, to Acer negundo interior Sargent, and it seems probable that this view is correct. 



37 Originally described in 1838 as Negundo Californicum Torrey & Gray, and in 1840, as Acer Californi- 

 cum Dietrich, a name now used by some authors. In 1889 it was named Negundo aceroides var. Califor- 

 nicum Sargent, and in 1891, ^Icer Negundo var. Californicum Sargent, while Rulac californicum (Torrev 

 & Gray) Nieuwland was applied to it in 1911. 



