mt 



66 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



thick, of less tlian the average Avi<hh of tlie wing, not circunivaUate, disthicLly and 

 cloHely trauHverso-rugoso and stron^^ly dotted; style and Htipe nearly equal, both short. 



The type of this uneoininonly well-marked ^species Ih on National Herbarium slieet 

 no. 15267, purpttrtin;^^ fo have been obtained by Dw Bigelow on Whipple's Expe- 

 ditioUj on the Canadian River, somewliere between Fort Smith and the Rio Grande. 



There are two (>tlier sheets from tht^ same general reginn, collected more recently, 

 that may or may not brlong here — one by Dr. E. Palmer, from between Fort Cobb 

 and Fort Arbuekle, in 1S68, and one by M. A. Carleton, from Cheyenne County, Okla- 

 homa, JunCj 1891. Txith these are in early and immature state, though the fruits, if 

 not mature, are nevertheless full grown and nimilar to those of the tyj^e, while, if the 

 foliage is less remarkal^ly gland-dotted, that may well hv owing to their immaturity. 



28- Ptelea aboriginum, sp, nov 



Twigs of the seapou appearing more or less rugose, but the nnevenness obscured 

 by a short dense spreading pubescence, the older glabrate, smootlush, dark grayish- 

 brown: leaves subcuriuLOous, of a rather lively green above, jtale beneath, botli faces 

 with obscure and scattered hints of pubescence and conspicuously i)nn(:tate; odd leaf- 

 let obovate-ellii>tie to rhomboid-ellii>tic or rhomboiil-Ianceolate, about 5 to 7 cm. long, 

 ai'ute at apex, crenate or subentire, the pair <pute similar, l)ut smaller by one-third 

 or one-half, seldom o])viously inequilateral: samara l.o to 2 cm. long, almost as broad, 

 little deviating frotn the orbicular, truncate or emargiiuite at base, at apex usually 

 obtuse, sonu^times retuse; body thick, round-oval, large, its width notably exceeding 

 that of the wing, lightly circumvallate, the transverse rugosity low, somewhat reticn- 

 lately broken, the gland dots large and obvious; stipe broad, cuneate-linear, a little 

 longer than the sleiult;r style. 



Rocky hills, Signal Mountain, Indian Territory, August 4, 1891, C. S. Shehlon, 

 no. 247, as in the National Herbarium. 



29. Ptelea lucida, sp. nov, 



Twdgs dark red-brown, low-rugose, obscurely if at all glandular, glabrous or with 

 scattered small hairs: leaves not large, subcorlaceous, glabrous excej^t a few scattered 

 hairs along the margin and the midveiu beneath, bright green autl ^^liining above, 

 lighter and without luster beneatli, in no ])art jjale or glaucescent; odd leaflet cuneate- 

 obovate, very obtuse, 4 to 5 cm. long, 2 to 2,5 cm. wide above the middle, all 

 obscurely crennlate, though seeming quite entire, a very narrow margin being revo- 

 lute, the pair like the odd one in outline though smaller and inequilateral: sanuiras 

 large for the foliage, suborbicular, 2 cn^. wide, the length somewhat less, Ijoth ends 

 being retuse, the body round-oval, of less than the width of the wing, lightly cir- 

 cumvallate, the rugosity obscure and inclined to be radiate. 



Rocky bluffs of Comanche Peak, Texas, J. Reverchon, Jujic, 1SS2, no. 1229, as in 

 the herbarium of John Donnell Smith. 



In the Na.tiojial Ilerbaruim, occupying sheet no. 125, are two immature twigs from 

 Gilluspie County, Texas, collected by G* Jenny, that seem to be 7\ lacida. A thinl, 

 on sheet 358:^74 from Kerr County, in the same State, by W. L. Bray, is obviously to 

 be referred here, altiiough fruit in this is oidy half grow^n. Tiu^ leaves iji these (^arly 

 specimens are of course thin, not subcoriacertus as in the mature type specimen (h>1- 

 lected by Reverrhon. 



30. Ptelea toxicodendron Small, P.ull. Torr. Club 28 : 2<U. 1(H)1. 



Mature twigs dull rather dark brown, glabrous, remarkably smooth; foliage of a 

 vivid almost shiniug green above, less vivid but not jiale lu^neath, in age doubtle^sH 

 subcoriaceous; od<l leaflet obovate, 4.') to G cm. long, abruptly acute at base, at apex 

 obtuse or even emarginate, plainly crenate, the larger <loubly so, the i>air commonly 

 smaller by one-half or one-third, nearly ovate and l)ut slightly inequilateral, all 

 sessile: samaras unknown. 



