THE GENUS FRAXINUS. 211 



September 29, 1899, Townsend & Barber (No. 354, type); road from 

 San Mateo to Guasarachi, September 24, 1898, E. A. Goldman 

 (No. 153). 



This species differs from the preceding species chiefly in the glau- 

 cous papillose under surface of the leaflets and from F. americana in 

 its sessile smaller leaflets. Mearns's No. 2533 differs from the type 

 in its larger, nearly entire leaflets 4-6 cm. long and 2-2.5 cm. broad 

 and in the larger, many-fruited panicles. 



5. Fraxinus Lowellii Sargent, n. sp. 



Folia 9-15 cm. longa, petiolis crassiusculis glabris v. leviter villosis; 

 foliola 5 V. rarius 3, ovata, acuminata, apice acuta v. rarius obtusa, 

 basi cuneata, grosse serrata saepe tantum supra medium, luteo-viridia, 

 supra glabra v. in costa puberula, subtus glabra v. rarius ad basin 

 costae pallide luteae sparse villosula, 6-8 cm. longa et 2.5-3.5 cm. 

 lata, nervis tenuibus arcuatis ante marginem leviter incrassatum et 

 revolutum anastomosantibus; petioluli 5-15 mm. longi. Flores non 

 visi. Fructus mense Julio maturantes, in paniculis longis glabris, 

 oblongi-elliptici v. oblongo-obovati, basi calyce minuto leviter den- 

 tato instructi, apice dilatati v. sensim attenuati et rotundati, saepe 

 emarginati, 2.5-3.5 longi et 7-9 mm. lati; ala ad basin capsulae 

 valde compressae striatae 1.8-2.5 cm. longae decurrens. 



Arbor 7-S-metralis, cortice fusco profunde fisso, ramulis validis 

 quadrangulatis saepe alatis, interdum fere teretibus, hornotinis fusco- 

 aurantiacis, annotinis cinereo-brunneis. 



Arizona. Coconino Co.: Oak Creek Canyon, about 20 miles 

 south of Flagstaff, Percival Lowell, June 1, 1911, A. Rehder, July 13, 

 1914 (No. 53, type). Yavapai Co.: Copper Canyon, near 

 Camp Verde, alt. 1500 m., A. Rehder, September 16, 1916 (Nos. 524, 

 526, and 529, a pubescent form). Mohave Co.: Peach Springs, 

 1884, J. G. Lermnon (No. 3242). 



I take much pleasure in associating with this plant the name of 

 the late Percival Lowell, the distinguished astronomer who has greatly 

 added to our knowledge of the trees of northern Arizona. 



C. S. Sargent. 



6. Fraxinus anomala Torrey in herb, apud S. Watson in Rep. 

 U. S. Geol. Explor. 40th Parall. V. 283 (1871).— Parry in Am. Nat. IX. 

 203 (1875).— Gray, Syti. Fl. N. Am. II. pt. 1, 74 (1878).— Sargent, 

 Forest Trees N. Am. 10th Census U. S. IX. 106 (1884); Silva N. Am. 



