68 >NTRIBUTION8 FROM THE NATIONAL HERBARIUM. 



34. Ptelea neo-mexicana, sp. nov. 



Shrub 2 to 3 meters high; twigs of the season olive-green, glandular-tuberculate, 

 Bcarcely rugulose, minuteh and sparsely villous-hirtellous, the petioles, pedicel and 

 lower face o! leaves more pronouncedly bo: foliage thin, of a very bright am I lively 

 green above with a trace of pubescence on the veins, beneath pale though hardly 

 glaucescent, but with scattered soft hairs; odd leaflet lance-rhomboid, 5.5 to 7.5 cm. 

 I<>ii:_ r . equally acute at each end, the laterals sometimes as large, oftener smaller by 

 one-fourth, obliquely ovate, very inequilateral, acute, all evenly and obviously crenate, 

 not notably punctate on either face: Bamaras Large, thin, and flat, suborbicular, - cm. 

 wide, the Length less by 1 mm. or more, both ends a little retuse; body round-oval or 

 almost orbicular, of about the width of the wing, circumvallate, the rugosit} pro- 

 nounced and elevated, more or less broken into transversely elongated reticulations, 

 the gland-dots obscure; Btyle and stipe not very unequal, the latter a trifle shorter. 



In the Black Range, southern New Mexico, at about 2,270 meters, < >. I». Metcalfe, 

 October 11. 1904, his no. L479, as in the National Herbarium. Fendler's no. 95 may 

 perhaps be the same, but the fruit in his specimens is only half grown, yet the foli- 

 age, bo much younger than in Metcalfe's, is nevertheless of a firmer texture, which is 

 prejudicial against its being the same. 



35. Ptelea acutifolia < iivriic A: Hose, sp. nov. 



Twigs of the season <lull chestnut-color, rather sharply and angulately rugose and 

 puberulent, the older glabrate, darker, obtusely and tortuously striate: leaves firm 

 but not Bubcoriaceous, deep green above, paler beneath and villous-strigulose, defi- 

 nitely crenulate, all on elongated petioles mostly 6 to 8 cm. Long; odd leaflet Lance- 

 elliptic, very acute at both ends, 5.5 to 8 cm. long, the pair usually but little smaller 

 and of the same outline, being scarcely inequilateral: Bamaras small for the foliage, 

 transversely Bubquadrate-orbicular to quite orbicular, the largest and most quadrate 

 2 cm. wide. 1.5 cm. long, such subtruncate at both ends; body very round-ovoid, 

 hardly a> broad as the wing, lightly circumvallate, not at all sharply trans 

 rugose, moderately punctate; Btyle and stipe nearly equal. 



state of .Jalisco. Mexico, on the road between Huejuquilla and Mesquitec, August 

 25, L897, Dr. J. X. Rose, no. 2580, as in the National Herbarium. Species not other- 

 wise known, and remarkable for the great length of the petioles, the leaflets not acu- 

 minate, though very acute. 



36. Ptelea meg-acarpa Rose. sp. nov. 



Twigs tortuously striate rather than rugulose, and with glands between the lines; 

 hark chestnut-colored when mature, glabrous: Leaves Large, of thin texture, vivid 

 dark-green on both faces, Bcarcely Lighter beneath and not in the Least glaucescent, 

 glabrous; Leaflets ovate-elliptic, the pair almost or quite as large as the odd one, 

 oblique rather than notably inequilateral, all cuspidately acuminate, entire, the odd 

 one 7 to 12 cm. Long: samara- very large, thin and tlat, the circumscription exactly 

 orbicular, abruptly subcordate at base and equally obcordate-notched at apex, both 

 the length and breadth about '■'>.'■> cm.; body small in proportion to the wing, cir- 

 cumvallate, transverse-rugose, almost dotless, as also the wing; style of thrice the 

 length of the stipe. 



Dr. Rose establishes this handsome species on Mr. Pringle's no. 8868 type in 

 the National Herbarium), from the state of" Hidalgo, Mexico: audit has been so 

 distributed. 



Mr. Pringle reports it to attain the dimensions of a small tree at about 1,600 

 meters altitude below Trinidad Iron Work-, where it was obtained by him .June -J, 

 1904. Flowers were collected May 10, but, unhappily, none but the pistillate; bo 

 that the character of the filaments can not he given. 





