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. angustifolia. 
Younger branches reddish brown; plants ill-scented; leaves green 
when shed... ..... 2.22220. 2 eee eee eee ee eee 2. P. tomentosa. 
1. Ptelea angustifolia Benth. Pl. Hartw. 9. 1839. 
Ptelea verrucosa Greene, Contr. U. S. Nat. Herb. 10: 69. 1906. 
Ptelea confinis Greene, op. cit. 72. 
TypE LocaLity: Mexico. 
Rance: 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. baldwinii Torr. & Gray, but 
the southwestern plants seem different from those of Florida, the type locality 
of P. baldwinti. 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. 8. 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 subvestita Greene, op. cit. 67. 
Ptelea neomexicana Greene, op. cit. 68. 
TypE Locality: Louisiana. 
Rance: Arizona and New Mexico, eastward to the Atlantic coast. 
New Mexico: Pajarito Park; Sandia 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 
(Wooton 657); that of P. villosula from the Organ Mountains (Wooton 134); that of 
P. undulata from the Burro Mountains (Rusby 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 (Wooton 658); of P. monticola from the 
Guadalupe Mountains of western Texas; of P. similis from near Clifton, Arizona, near 
the New Mexico line; of P. polyadenia from the Canadian River, possibly in New 
Mexico (Bigelow); of P. subvestita from about Silver City and Fort Bayard (Greene); 
of P. neomexicana from the Black Range ( Metcalfe 1479). 
1 25: 210. 1911. 225: 209. 1911. 
