iqiq] SARGENT— north AMERICAN TREES 



239 



with slightly thicker, lanceolate to oblong-ovate or obovate, often 

 entire or irregularly dentate, occasionally lobed leaflets, the terminal 

 leaflet occasionally 3-lobed, glabrous above and usually slightly 

 pubescent over the lower surface; the base of the fruit is usually 

 but not always constricted. 



This variety is distributed from western Massachusetts, through New 

 York to Ohio, northern Wisconsm, Minnesota, Iowa, South Dakota, Dufferin, 

 Manitoba, and Nez Perce County, Idaho; it is common in northern Missouri 

 and occurs near Noel, JNIcDonald County, in the extreme southwestern part 

 of that state (£. J. Palmer, no. 5479). 



Acer Negundo var. texanum Pax, Engler Bot. Jahrb. 7:212. 

 1886. — A. calif ornicum var. texanum Pax, I.e. 11:75. 1890. — 

 Rubac texana Small, Fl. Southern U.S. 743 (in psiri).— Negundo 

 texanum Rydberg, Bull. Torr. Bot. Club 40:56. 1913.— This 

 variety is best distinguished by the 3-foliate leaves with broader 

 ovate to obovate, coarsely serrate leaflets cuneate or rounded at 

 base and covered below through the season with loose pubescence. 

 The branchlets are pale pubescent or tomentose during their first 

 season and the body of the fruit is usually puberulous and shghtly 

 or not at all constricted at the base. 



This variety occurs in western (Jackson County) and southwestern Mis- 

 souri, northeastern Kansas, through Arkansas to western Oklahoma and to 

 the valley of the San Antonio River, Texas. It appears to have been collected 

 first by Lindheimer near New Braunfels, Texas, in 1843 (no. 360 in Herb. 

 Gray). Eastward it passes into 



Acer Negundo var. texanum f. latifolium, n. i.—A. Negundo 

 var. latifolium Pax, Engler Bot. Jahrb. 11 : 75. 1890.— Only differing 

 from typical var. texanum in its glabrous branchlets and usually 

 glabrous fruit often slightly constricted at the base. 



This form occurs in eastern Texas, southern Arkansas, Louisiana, in the 

 valley of the Black River, eastern Mississippi, at Nashville, Tennessee, on the 

 banks of the Catawba River near Marion, North CaroKna, in Virginia, and 

 southern Ohio. 



Acer Negundo var. interior, n. var.— ^. interior Britton in 

 Britton and Shafer, N. Am. Trees, 6ss,fig- 608. 1908.— ?^. Kingii 

 Britton, I.e. 1908. — Rulac interior Nieuwland, Am. Mid. Nat. 

 2:139. igu.— Negundo interius Rydberg, Bull. Torr. Bot. Club 



