212 REHDER. 



VI. 39, t. 266* (1894) Mati. Trees N. Am. 765, fig. 611* (1905).— 

 Wenzig in Bot. Jahrb. IV. 186 (1883).— Wesmael in Bull. Soc. Bot. 

 Belg. XXXI. 114 (1892).— Koehne, Deutsche Dendr. 511, fig. 90 d 

 (1893).— CoviUe in Coiitrib. U. S. iXat. Herb. IV. 148 (Bot. Death 

 Valley Exp.) (1892).— Britton, N. Am. Trees, 796, fig. 797 (1908).— 

 Elwes & Henry, Trees Gt. Brit. Irel. IV. 900, t. 262, fig. 7 (1909).— 

 Schneider, Ill.^Handb. Laubholzk. II. 822, fig. 516 a-b, 518 p (1912).— 

 Wooton & Standley in Contrib. U. S. Nat. Herb. XIX. 496 (Fl. N. 

 Mex.) (1915). 



Fraxinus anomala, var. triphylla Jones in Proc. Calif. Acad. 

 Sci. ser. 2, V. 707 {Contrib. W. Bot. VII) (1895). 



New Mexico. San Juan Co.: Carriso Mts., July 28, 1911, 

 P. C. Stayidley (No. 7316). 



Arizona. Coconino Co.: Grand Canyon, June 14, 1891, 

 D. T. McDougal (No. 205), September 8, 1894, C. S. Sargent, Sep- 

 tember 12, 1894, J. W. Tourney, 1909, E. W. Nelson (No. 107), 

 May 31, 1913, E. A. Goldman (No. 2068), June 30, 1913, A. E. 

 Hitchcock (No. 79), July 19, 1914, A. Rehder (No. 105); two miles 

 below Pagumpa, alt. 1300 m., April 21, 1894, M. E. Jones (No. 5088); 

 Hermit Trail, June 18, 1916, Alice Eastwood (No. 5831). 



Southern Utah. Labyrinth, Colorado River, 1859, J. S. New- 

 berry; St. George, Virgin River, E. Palmer; Ranch, A. L. Siler; 

 Johnson, M. E. Jones. 



This very distinct species occurs within our area only in northern 

 Arizona and in the extreme northwestern corner of New Mexico and 

 extends into Utah and Nevada. It shows little variation; the variety 

 triphylla Jones can hardly be considered a distinct form or variety, 

 as trifoliolate lea^'es are likely to appear on any vigorous shoot of 

 normal simple-leaved plants. 



Arnold Arboretum, Harvard University. 



4 Except the sterile branch with pinnate leaves which was drawn from a 

 cultivated plant supposed to be F. nnotnala. 



