WOOTOX 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. angustifolia. 



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. 1 Ptelea 

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

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

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

 Survey, possibly in New Mexico. The type of P. conjinis 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, loo. cit. 



Ptelea jucunda Greene, op. cit. 63. 



Ptelea parvula Greene, op. cit. 64. 



/'I< ka monlicola Greene, loc. cit. 



Ptelea similis Greene, op. cit. 65. 



Ptelea polyadcnia Greene, loc. cit. 



Ptelea subvestita 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; Sand ia Mountains; Coolidge; Barranca; Black Range; 

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

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

 zones. 



For further synonomy of the species see the North American Flora. 2 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 White Mountains of New Mexico 

 ( Wootom 857); that of P. villosula from the Organ Mountains {Wooton L34); that of 

 P. undulata from the Burro Mountains (Rusby 111); that of P. cognata from Fort 

 Iluachuca, Arizona; the type of P. jucunda from the San Luis Mountains ( Mcarns 

 383); of P. parvula from the White Mountains (Wooton 658); of P. monticola from the 

 Guadalupe Mountains of western Texas; of P. similis from near < lit'ton. Arizona, mar 

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

 Mexico (Bigelow); of P. subvestita from about silver City and Fori Bayard (Greene)] 

 of /'. i i from the Mack Range I Metcalfe 1479). 



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



