58 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



I to be common along the White River near Eagle Rock, in extreme south- 

 western Missouri, where it was collected June 21, 1897, bj B. F. Bush, hi- no. 171 

 as in National Herbarium. One would expect it in adjacent Arkansas. 



2. Ptelea isophylla, sp. nov, 



Twigs of the Beason light chestnut-color, glabrous, sharply rugose, obscurely glan- 

 dular, the older -lark brown, Bmooth: Leaves thin, of a light dull glaucescenl 

 i»n t »< < 1 1 1 faces and both with tract'.- of pubescence, only the upper minutely and 

 inconspicuously gland-dotted; <><1<1 leaflet ovate to rhombic-ovate, i to 6 cm. long, 

 abruptly obtuse-pointed, Bubentire, the pair Beldom smaller, sometimes even larger, 

 relatively broader, scarcely inequilateral: samara very large for the foliage, 2 to 2.6 

 cm. long, nearly a< wide. Buborbicular l>ut with obcordate Bummit and Bubcordate 

 base; body round-oval, of lees than the width of the wing, circumvallate, the trans- 

 rugosity close but low and not very distinct, the whole only obscurely gland- 

 dotted; stipe neatly twice as long a> tin- Btyle, both slender. 



Known to me only as collected by Mr. P>. F. Bush, June B, 1898, from \\ 1- in 



the vicinity of Swan, Missouri. Thetypesheel in the National Herbarium has Mr. 

 Bush's no. 211. The specie- i- next <»t kin to my /'. mesochora of the upper 

 Mississippi region. 



3. Ptelea prominula, sp. nov. 



Perhaps a low or small shrnh, the twigs small, with short internodes and pubes- 

 cent: leaves small. <lnll-L r reen < pubescent beneath, less so above; odd leaflet broadly 

 obvoate, 1 to 4.5 cm. long, 2 to 2.5 cm. wide above the middle, all Bubentire, very 

 shortly cuspidate at apex, the pair of laterals not much smaller, round-ovate: sama- 

 ra- suborbicular, small. 1.5 to 1.7 cm. long, very nearly as broad, Bubcordateal base, 

 retn.-e at apex, the body of about the width of the wing, faintly dotted but Btrongly 

 and prominently transverse-rugose and circumvallate, the reticulation of the wing 

 unusually elevated and prominent, as also the subequal style and stipe, even these 

 connected by a sharp ridge pervading whole length of the hotly of the fruit 



Know n to me in but a Bingle twig in mature fruit, pui porting to have been collected 

 on a creek hank near Austin. Texas, May ( .», 1872, by Elihu Hall, the label bearing 

 hi- distribution number, 74; hut on the same sheet in the National Herbarium, and 

 under the same label, occur two other twigs, both of /'. rhombifolia, and with fruit 

 very young, not half grown. 



The wing of /'. />r<>iiiinii/ti is wavy rather than plane, and the elevated character of 

 the wrinkle^ and reticulations is peculiar. 



4. Ptelea wrightiana, sp. nov. 



Twigs of the season short, slender, pubescent, and regulose: leaves not small, 

 very thin, dull bluish-green, finely but scantily pubescent on both face-: middle 

 leaflet elliptic-obovate, 5 to 8 cm. long, the pair obliquely ovate, only half as large, 

 all merely acutish, Bubentire: samaras very large, round-oval, 2.5 cm. long, 2.2 wide, 

 obtuse at both ends; body round-oval, of much less than the width of the wing, not 

 obviously either punctate or circumvallate. hut the transverse wrinkle- sharply 

 prominent, as also the reticulation of the wing; style and stipe equal, both very 

 long, rather prominent. 



Turkey Creek, western Texas, June, 1849, Charles Wright, no. 82 as in the Na- 

 tional Herbarium. Referred to in (day. Plants Wrightianse. & 



I al-o refer hen- provisionally a sheet of specimens collected by Jenny in western 

 Texas, near San Antonio. It has similar fruits, the foliage differing in that it is of 

 firmer texture, and the outline of leaflets narrow, being elliptic-lanceolate. The 

 label hear- no date. 



"Toireya 5: loo. l» M'art 1. p. id 



