^** 



68 



CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



34. Ptelea neo-mexicana, sp. iiov. 



Shrub 2 to 3 meters high; twigs of tlie season olive-green, ^laiidular-tubcreulale, 

 scarcely rugulose, minutely and sparsely villous-hirtellouH, the petiole^s, pedicels, and 

 lower face of leaves more pronouncedly so: foliage thin, of a very bright and livt^ly 

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

 glancesceut, but with scattered soft hairs; odd It^aflet lance-rhomboid, 5.5 to 7.5 cm. 

 long, equally acute at each end, the laterals sometimes as large, oftener smaller by 

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

 not notalily i)unctate on either face: samaras large, tliin, and flat, auborbicular, 2 cm. 

 wide, tilt? length less by 1 nun. or more, ])oth c^n<ls a Uttle retuse; bo<ly round-ifval or 

 almost orbicular, of about the wifhh (^f the wing, circtmivallate, the rugosity pro- 

 nounced and elevated, more or less brokt^i into transversel}' i^longated reticulations, 

 the gland-di>ts obscure; stykMind stipe not v(uy nnequal, tlie latter a trifle shorter. 



In tlie Black Range, southern New Mexici>, at about 2,li70 meters, 0. C Metcalfe, 

 October 11, 1904, his no. 1471), as in the National Herbarium. Fendler's no, 95 may 

 perhaps bo the same, but the fruit in his specimens is only haU" grown, yet the foli- 

 age, so much younger than in ^letcalfe's, is nevertheless of a finiier texture, which is 

 prejudicial against its being the same. 



35. Ptelea acutifolia rfreenc^ ik Rose, sp. nov. 



Twigs of the season dull chestnut-color, rath(^r sliarply and angulately rugose and 

 puberulent, the older glal)rate, darker, ol)tuscly and tortuously striate: leaves lirm 

 but n^.it subcoriaceous, deep green above, paler beneath and villous-strigulose, defi- 

 nitely crenulate, all on elongated petioles mostly G to 8 cm. long; odd leaflet lauce- 

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

 and of the same outline, being scarcely inetiuilatcral: samaras small for the foliage, 

 transversely subquad rate-orbicular t<^ (piite orbicular, the largest and most qua<lrate 

 2 cm. wide, 1.5 cm. long, such subtruncate at l)oth ends; Ix^ly very round-ovfud, 

 hardly as broad as the wing, lightly circumvallate, not at all ^harjily transverse- 

 rugose, moderately punctate; style and stipe nearlycniual. 



State of Jalisco, Mexico, on the road between lluejuquilla and ^lesqultec, August 

 25, 1897, Dr. J. N. Rose, no. 2580, as in the National Herbariuui. Spe<*ies n*;>tother- 

 wdse known, and remarkabh^ for the great length of the petioles, the leaflets m^t acu- 

 minate, though very acute. 



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



Twigs tortuously striate rather than rugnlo^e, and witli glands between tlu^ lines; 

 bark chestnut-colored when mature, glabrous: leaves large, of thin texture, vivid 

 dark-green on both faces, scarcely lightiu' beneath and not in the least glauceecent, 

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

 oblique rather than notably inequilateral, all cuspidately acuunnate, eiitire, the odd 

 one 7 to 12 cm. long: samaras very large, thin and flat, the circumscri2>tIon exactly 

 orbicular, abruptly subcordate at l)ase ainl efpuilly obcordato-notched at apex, both 

 . the length and breadth ab*)ut 3.5 cm.; body small in jiroportion to the wing, cir- 

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

 length of the stipe. 



Dr, Rose establishes this handsome species on 3[r. Priugle's no. 88t>8 (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 1,000 

 meters altitude below Trinitlad Iron Works, where it was obtaiued by him Jum^ 2, 

 1904, Flowers were collected May 10, but, un]iap])ily, none but the pistillate; so 

 that the character of the filaments can m>t bt^ given. 



