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GREENE I^TELEA IN THE WEST AND SOUTHWEST. 63 



siibcoriaceouSj of a deep, slightly bluish-green above, very glaucous beneath, gla- 

 brous on both face^; miildle leaflet ovate-elliptic, acute, subserrate-crenate or siib- 

 entire, 3.5 to G cm, long, the laterals similar, oitvn q\u\v aw large, ol>liqne-ovate or 

 else almost etiual-sided and ovate: samaras orbicular to subc]uadrate-ovaI, the 

 largest nearly 2 cm. long and elongated, the smaller about 1.5 cm. and orbicular; 

 body large, (nal, deeply and coarsely ])itted, rather than trauj^verse-rugose, gland 

 dots few but not obscure; stipe very Hhort, style quite long. 



Fort Iluac^huca, Arizona, September, 1891, T. Vj. Wiicox; type in National Her- 

 barium. Species allied to the foregoing, as in<lioated by the coriaceous blue-green 

 foliage, but specifically mtII marked by its total lack of pubescence, long slender 

 petioles, and unusually warty twigs. * 



18. Ptelea crenata, sp, nov. 



Twigs bright chestnut-color and glabrous, more glandular-tuberculate than rugose: 

 leaves bluish-green and strongly ]Minctate above, glaucescent beneath^ Avith traces 

 of pubescence on both faces and in texture fairly subcoriaceous; odd leaflet ovate, 

 not inclining to rhomboi<l, 4.5 to 6 cm. long, rather ol.>tuse at apex, at base acute 

 but sessile, the jmir oval, Init obli(]Uely so, much or little small, all distinctly cre- 

 nate: samaras small for the foliage, nearly orbicular, L5 cm. wide, not (juite as long, 



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the apex being retusc, the base truncate; body orbicular, its width rather greater 

 than tliat of the wing, not circumvallate, the ridges low an<l irregular but coarse, 

 dots obscure an<l few; style and sti])e both short, subequal. 



In some })art of northern Arizona south of Flagstaff, J. W. Toumey, September, 

 1894. Allicil to the last two, but not to be confused with either. Type in the her- 

 barium of the California Academv of Sciences. 



19. Ptelea jucundaj sj). nov* 



Twigs of the season chestnut-brown, tubercnlate, minutely and only sparsely 

 pubescent, the older glahrate, ilark, polished: leaves subrtjriaceous, dull blue-green 

 above, merely glaucescent beneath, everywhere sparsely and obscurely pubescent; 

 middle leaflet lance-obovate or in some cuncute from the middle, 4 to 5 cm. long, 

 obtusish to very acute, subentive or crenatL-, tlie pair not much smaller, obliijuely 

 ovate or oval, all sessile: samaras rouml-obovate, rather small, 1.2 to 1.4 cm. long, 

 acntish at the narrowed base, commonly emarginale at summit; body round-oval, 

 of the widtli of the wing, coarsely and irregularly rugose, lightly circumvallatc, 

 notably punctate; style and stipe equal. 



Pan Luis Mountains, on the Mexican boundary line, Arizona, June 25, 1892, E, A. 

 Mearns, no. 1^83, as in the National Herbarium. A handsome species with glossy 

 chestnut-colored twigs and branches, rich green perhaj)3 i>crsistent foliage, and 

 smallish but elegant samaras. 



20. Ptelea sancta, sp. nov. 



Mature twigs of the season chestnut-color, short, rugulose, glabrous or with minute 

 scattered hairs, tlie older like them but glabrous: leaves small, glaucescent on both 

 faces and small-dotted, niidvein and veinlets slender and v/hitish, a scanty minute 

 histellous hairiness along them, the leaf margins unevenly crcnate; odd leaflet 

 broadly oborate above and abrupt cuneate base, varying to rhomboid-ovate, obtuse or 

 acutisli, 3.5 to 4.5 cm. long, 2 to 2.5 wide abovt' the middle, the pair smaller by less 

 tlian one-third, very ineijuilateral: samaras of the smallest, round-obovate or 8ub])y- 

 riform in outline, 1 to 1,5 cm, long; body large in proportion to the twig, oval or 

 obovoid, with l>road an<l low not very definitely transverse rugosity; style and stipe 

 subequal, both short 



San Jos^ Mountains, Sonora, Mexico, August 3, 1893, Dr. E. A. MearnSj IJ. S. 

 Army; species w^ell marked and not otherwise known. Type in the National Herb- 

 arium. 



