70 Rydberg : Rocky Mountain flora 



Wings thickened at the insertion. 



Leaves ternately bipinnatifid; oil tubes solitary in each 



interval. i. C. Jonesii. 



Leaves pinnate, with lobed or divided leaflets; oil tubes 



several in each interval. 2. C. Rosei. 



Wings not thickened at the insertion. 



Flowers purplish; oil tubes 8 on the commissural side. 3. C. purpureas. 



Flowers greenish-yellow; oil tubes 4 on the commissural 



side. 4. C. Betheli. 



i. Coriophyllus Jonesii (C. & R.) Rydb. 



Cymopterus Jonesii C. & R. Rev. N. Am. Umb. 80. 1888. 

 Aulospermum Jonesii C. & R. Cont. U. S. Nat. Herb. 7: 178. 

 1900. 



2. Coriophyllus Rosei (M. E. Jones) Rydb. 



Aulospermum Rosei M. E. Jones; C. & R. Cont. U. S. Nat. Herb. 

 7: 179. 1900. 



3. Coriophyllus purpureus (S. Wats.) 



Cymopterus purpureus S. Wats. Am. Nat. 7: 300. 1872. 

 Aulospermum purpureum C. & R. Cont. U. S. Nat. Herb. 7: 178. 

 1900. 



4. Coriophyllus Betheli (Osterhout) Rydb. 

 Aulospermum Betheli Osterhout, Muhlenbergia 6: 46. 1910. 



PSEUDOCYMOPTERUS C. & R. 



This genus is one of the most unnatural in Coulter & Rose's 

 Monograph. Jones* called attention to this fact, although he 

 included the genus, as well as Oreoxys, Rhysopterus, Aulospermum, 

 and Pteryxia in Cymopterus, and does not go to the bottom of the 

 facts. The genus as constituted by Coulter and Rose contains at 

 least three distinct groups of plants of little relationship to each 

 other. The first group contains Pseudocymopterus montanus and 

 its close relatives; the second of P. anisatus and P. aletifolius, and 

 perhaps P. Hendersonii, which I do not know; and the third of P. 

 bipinnatus and probably Cymopterus nivalis S. Wats., of which the 

 fruit is unknown. P. montanus is the type of the genus, which 

 latter therefore must be restricted to it and its relatives. Jones 



* Cont. West. Bot. 12: 24-29. 1908. 



