208 REHDER. 



Canyon, June 19, 1909, L. X. Godding (No. 105). Pima Co.: 

 Range Reserve, July 21, 1911, E. H. ]]'ooton (U. S. Nat. Herb. No. 

 690667, type); banks of Rillita, 1881, C. G. PringJr. Yavapai 

 C o. : Beaver Canyon, near Camp Verde, alt. 1500 m., Sept. 7, 1916, 

 A. Rehder (No. 541); Sierra Prieta near Prescott, 1800 m., September 

 4, 1916, A. Rehder (No. 513). 



This variety differs in the quite glabrous branchlets and leaves from 

 the type and from var. Toumeyi to which it is nearest in the shape of 

 its leaflets; from specimens of var. coriacea with narrower glabrescent 

 leaflets it can be distinguished only by the thinner leaflets not strongly 

 reticulate beneath. It seems to be not uncommon throughout New 

 Mexico and Arizona and in the localities where I collected it I nearly 

 always found it associated with pubescent forms. 



3. Fraxinus Standleyi, n. sp. 



Arbor, ramulis hornotinis teretibus glabris v. fere glabris, anno- 

 tinis cinerascentibus, interdum atropurpureis, vetustioribus cinereis; 

 gemmae ferrugineo-tomentulosae. P^olia longe petiolata, 13-18 cm. 

 longa, 7-9-foliolata; foliola sessilia v. brevissime petiolulata, ovata v. 

 ovato-oblonga, rarius elliptica, acuta v. breviter acuminata, basi late 

 cuneata, terminale sensim in petiolulum circ. 0.5 cm. longum attenua- 

 tum, omnia irregulariter et leviter serrulata, supra luteo-viridia, 

 glabra, subtus glaucescentia, leviter reticulata, secus costam basin 

 versus plus minus\e villosa, cetera glabra v. fere glabra, rarius tota 

 facie sparse minute villosula, minute punctulata, 4-6 cm. longa et 

 1.5-3 cm. lata in specimine typico, nervis utrinsecus 5-7 ante marginem 

 dissolutis; petioli satis graciles, 2.5-5 cm. longi, interdum purpur- 

 ascentes, supra applanati v. leviter concavi, basi leviter tantum 

 dilatati, glabri; rhachis glabra, supra leviter canaliculata, leviter 

 marginata. Flores non visi. Paniculae fructiferae 8-12 cm. longae, 

 glabrae; pedicelli graciles; calyx persistens minutus, irregulariter 

 inciso-dentatus et denticulatus; samara 2.5-3 cm. longa, capsula 

 subteres v. leviter compressa, ellipsoidea v. oblonga, basi subito 

 contracta, 1-1.3 cm. longa et 2.5-3.5 mm. diam., leviter striata; ala 

 oblongo-spatulata, ad medium capsulae decurrens, 6-7 mm. lata, 

 apice obtusiuscula v. leviter emarginata in specimine typica, interdum 

 anguste oblonga. 



New Mexico. Dona Ana Co.: Organ Mts., Van Pattens 

 Camp, June 9, 1906, P. C. Standley (U. S. Nat. Herb. No. 560835, 

 type). Lincoln Co. White Mts., Gilmore's Ranch, alt. 2500 m., 

 August 1 7, 1908, E. 0. Wooton (No. 3943). Luna Co.: Florida Mts., 



