WOOTON AND STANDLEY FLORA OF NEW MEXICO. 389 



KEY TO THE SPECIES.. 



Younger branches pale yellow or straw-colored; plants sweet- 

 scented; leaves turning bright yellow in autumn 1. P. angusti/olia. 



Younger branches reddish brown; plants ill-scented; leaves green 



when shed 2. P. tomentosa. 



1. Ptelea angustifolia Benth. PI. Hartw. 9. 1839. 



Ptelea verrucosa Greene, Contr. U. S. Nat. Herb. 10: 69. 1906. 



Ptelea confinis Greene, op. cit. 72. 



Type locality: Mexico. 



Range: Western Texas to southern California, south into Mexico. 



New Mexico: Bishops Cap; Dona Ana Mountains; Florida Mountains. Dry hills, 

 in the Lower and Upper Sonoran zones. 



For further synonymy of this species see the North American Flora. ^ Ptelea 

 angustifolia is there considered to be a synonym of P. haldwinii Torr. & Gray, but 

 the southwestern plants seem different from those of Florida, the type locality 

 of P. haldwinii. The type of P. verrucosa was collected by the Mexican Boundary 

 Survey, possibly in New Mexico. The type of P. confinis was collected near El 

 Paso, Texas, by G. R. Vasey. 



2. Ptelea tomentosa Raf. Fl. Ludov. 108. 1817. 



Ptelea formosa Greene, Contr. U. S. Nat. Herb. 10: 59. 1906. 



Ptelea villosula Greene, op. cit. 60. 



Ptelea undulata Greene, op. cit. 62. 



Ptelea cognata Greene, loc. cit. 



Ptelea jucunda Greene, op. cit. 63. 



Ptelea parvula Greene, op. cit. 64. 



Ptelea monticola Greene, loc. cit. 



Ptelea similis Greene, op. cit. 65. 



Ptelea polyadenia Greene, loc. cit. 



Ptelea suhvestita Greene, op. cit. 67. 



Ptelea neomexicana Greene, op. cit. 68. 



Type locality: Louisiana. 



Range: Arizona and New Mexico, eastward to the Atlantic coast. 



New Mexico: Pajarito Park; SandiaMoimtains; Coolidge; Barranca; Black Range; 

 Burro Mountains; west of Chloride; Big Hatchet Mountains; Organ Mountains; White 

 Mountains; San Luis Moim tains. Canyons, in the Upper Sonoran and Transition 

 zones. 



For further synonomy of the species see the North American Flora. ^ A great many 

 segregates of this group have been described recently, but there seems to be no means 

 of separating the named forms definitely, at least without ampler material than is now 

 available. The type of P. formosa came from the Wliite Mountains of New Mexico 

 {Wooton 657); that of P. villosula from the Organ Moimtains {Wooton 134); that of 

 P. undulata from the Biu-ro Mountains (Rusbij 111); that of P. cognata from Fort 

 Huachuca, Arizona; the type of P. jucunda from the San Luis Mountains (Mearns 

 383); of P. parvula from the White Mountains iWooton 058); of P. monticola from the 

 Guadalupe Mountains of western Texas; of P. similis from near CHfton, Arizona, near 

 the New Mexico line; of P. polyadenia from the Canadian River, possibly in New 

 Mexico (Bigelow); of P. suhvestita from about Silver City and Fort Bayard (Greene); 

 of P. neomexicana from the Black Range (Metcalfe 1479). 



1 25: 210. 1911. 2 25: 209. 1911. 



