170 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
New Mexico: Mangus Springs, Rusby, in 1880; Carrizallilo Mountains, Mearns 38, 
April 17, 1892. 
Uran: Bishop 29, in 1872; Uinkaret Mountains, Mrs. Thompson, in 1872; near 
Bellevue, Jones 5002, March 30, 1894; Washington, Jones 5140c, May 1, 1894; 
Laverken, Jones 5196m, May &, 1894. 
Nevaba: Mount Sabb, Palmetto Range, altitude 2,700 to 3,000 meters, Purpus 
5866, in 1898. 
CaLirorNtia: Whipple, in 1853-54. 
Mr. Marcus FE. Jones recognized and defined this species, but regarded it to be the 
same as Cymopterus montanus purpurascens Gray. An examination of the type spee- 
imen of Gray’s variety, however, shows it to be the same as CL utuhensis Jones. 
It is necessary, therefore, to refer Mr, Jones’s C. ulahensis to our P. purpurascens and 
to give a new name to his CL purpurascens. 
50. PTERYXIA Nutt. in Torr. & Gray Fl.1: 624. 1840. 
Calyx teeth evident. Fruit oblong to orbicular in outline, glabrous. 
Carpel usually strongly flattened dorsally, with wings thin through- 
Fig. 51.—Pteryxia terebinthina: a, « 4; by *« 6. 
’ 
out, lateral ribs with broad wings, dorsal and intermediates from 
strongly ribbed to broadly winged. Stylopodium wanting. Oil 
tubes several in the intervals. Seed face plane or with a shallow and 
broad concavity. : 
Plants of acaulescent habit or nearly so, and clothed at base with 
persistent leaf sheaths, with bright green or somewhat pale leaves 
clustered at base with main divisions ternate then pinnately finely dis- 
sected into short linear more or less pungent segments (not so crowded 
or confluent as in /’/e/lopterus), mostly no involucre, involucels of nar- 
row bractlets (not at all hyaline), and yellow flowers (except in 
DP. albiftora). 
First species cited, Pteryxia terchinthina (Selinum terehinthinum 
Hook. Fl. Bor. Am. 1: 266. 1834). 
A genus of at least 7 species, belonging to northwestern United 
States, from Wyoming to California, Oregon, and Washington. 
