62 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



V 



and broad^ subcordate at base, the obtuse suinniit conspicuously mucronate by the 

 long protruding style-tip; body of less than the width of the wing, the coarse, low 

 Avrinkles somewhat railiating from its center. 



State of Coahuila, Mexico, known in a single specimen (National Herbarium), 

 obtained by Dr. E. Pahner, in 1904, mixed with his no. 391, which is otherwise referred 

 to P. coaliullomB. 



14. Ptelea scutellata, sp. nov. 



Twigs of the j^cason rugulose, puberulent, the older glabrate, nearly smooth: 

 leaves subcoriaccous, deep l>lue-green above and glabrous, beneath glaucescent and 



obscurely puberulent; middle leaflet 4 to 5 cm. long, ovate lo rliombic-ovate and 

 elli{)tic-lanceolate, acute, crenulate, laterals remarkably small, seldom more than 

 half as large, only slightly inequilateral and always narrow: samaras subquadrate- 

 obovate to suborbicular, the more elongated 2 cm. long, the narrow base subcordate, 

 the broad apex obcordate, or at least retuse; body round-oval, not as wide as the 

 average width of tlie wing, rugose-reticulate and injpressed-punctate, not circum- 

 vallute; stipe prominent, style of equal length but obscure, 



Santa Eulalia Mountains, Chihuahua, Mexico, C, G. Pringle, October 2, 1S8G, hia 

 no, 940, as in National Ilerbariuui. The specimens are in ripe fruit of a former 

 season, or else of the spring preceding, while at the Oc^tober date of collecting full 

 chisters of flowers were in process of expansion. 



In the Herbarium of J(din Donnell Sinitli is a specimen from the same mountains, 

 collected by E. Wilkinson, in 18S5, in the month of Marcli, which is laden with 

 mature foliage and fruit as froni the autumnal flowering. 



15. Ptelea cuspidata, sp. nov, 



-I 



Twigs of the season chestnut color, puberulent, the older glabrate, all rugulose: 

 leaves subcoriaceous, glabrous, bluish-green above, glauctms beneath, moderately 

 punctate; odd leaflet lanceolate, 5 to 7 cm* long, acute or obtusish, evenly crenulate, 

 the pair of the same shape and from almost as large to barely one-third smaller, all 

 sessile: samaras broadly ovate-cordate to suborbicular, 2 to 2.3 cm. long, the width 



■ 



the same, the base cordate or subcordate, the apex broadly and bluntly cuspidate, 

 also mucronulate by the short free portion of the style; body oval, much narrower 

 than the average width of the wing, coarsely and not promuiently transverse-rugose 

 and rather closely punctate; stipe very short, style three times as long. 



Santa Eulalia Mountains, Chihuahua, March 1, 1885, E. Wilkinson, in mature 

 foliage and fruit as from an autumnal flowering. Abied to J\ scuiellaiay like it in 

 color and texture of foliage; both leaflets and fruits of different character. The only 

 specimens seen are in tlie National Herbarium, sheet 130319. 



16. Ptelea undulata, sp, nov. 



Shrub 4 m. high, with glabrous twigs almost verrucose^glandular and rugulose: 

 leaves sulH'oriaceous, nearly or quite glabrous, dull dark blue-green above, glances- 

 cent beneath, densely punctieulate on both faces; middle leaflet elhi^tic or even 

 somewhat rhombi-lanceolate, acute, G cm. long, obscurely and unevenly crenulate, 

 the laterals similar and not much smaller: samaras sulwrbicular, 2 cm. long and 

 broad, not flat, the broad wing being full and somewhat ruflled; bociy oval, circum- 

 vallate, the strong rugosity mostly broken into a reticulation inclosing many and 

 prominent gland-dots; stipe very short, style long, neither prominent. 



Probably of the Burro Mountains, southern New Mexico; liusby's 111 as in the 

 Is^ational Herbarium, gathered July 17, 1880. 



17. Ptelea coguataj sp. nov. 



Twigs of the season chestnut-color; glabrous and polished, warty-rugose, the short 

 ridges surmounted by a large gland: leaves on unusually long and slender petioles, 



