4 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 66 



Family ANACARDIACEAE 



RHUS VARIABILIS (Newberry) Knowlton 



At Station 2, near head of Salt Wash, Roan Mountains, Colorado, 

 we found a very fine leaf with nine leaflets, showing the petiolules 

 about 8 mm. long, the bases of the leaflets narrowly cuneate, the 

 serrations coarse and few. Newberry's figure cited by Knowlton 

 is not quite so coarsely toothed, but is doubtless the same thing. 

 Newberry did not intend to take this leaf as typical of his specieSy 

 but Knowlton has so restricted it, and must be followed. Knowlton's 

 figure 11, of his Rhus inyricoides^ appears to be the same species, but 

 apparently not figure 9, to which R. Tnyricoides should be restricted. 

 The leaflets of R. variabilis are widely spaced, the petiolules about 

 20 mm. apart. 



Family CELASTRACEAE 



EVONYMUS FLEXIFOLIUS Lesquerenx 



The apical portion of a leaf, showing the very characteristic fea- 

 tures, was collected by Mrs. Cockerell in the Green River shales at 

 Station 1, near head of Ute trail. Roan Mountains, Colorado. The 

 species has previously been known only by the unique type collected 

 in Wyoming. The long " drip-tip " suggests a moist climate. 



Family SAPOTACEAE 



BUMELIA COLORADENSIS. new species ' 



Plate 1, fig. 5 



Leaf apparently coriaceous, long oval, inequilateral and emarginate 

 at apex, broad-cuneate at base, entire, with a short somewhat twisted 

 petiole. Principal lateral veins few, widely spaced, about 6 to 8 mm. 

 apart with short veins between their bases. Leaf about 60 mm. 

 long and 32 wide, the widest part above the middle. 



Green River Eocene, Roan Mountains Colorado, Station 2, large 

 excavation at head of Salt Wash, 1922. 



Eolotype.—Q2^i. No. 36853, U.S.N.M. 



This may as well be 3flmvsops as Bumelia, but it is evidently 

 allied to Bumelia fiorissanti Lesquereux from the Miocene of Floris- 

 sant, differing by being oval rather than pyrif orm in outline. It does 

 not agree with any of the numerous fossil species described by Beriy. 

 It is indicative of a tropical or warm-temperate climate. Knowl- 

 ton's Carpolithus caryophylloides^ as figured, has the aspect of a 

 Mimusops calyx. Could it belong to the plant now described ? 



