FLORA OF THE GREEN RIVER GROUP. 197 



fig. 2, there is a small fruit, of Sapindus (enlarged, fig. 2a), comparable to 

 that of S. ruhiginosus, figured in Ung., " Syllog.," i, p. 34, pi. xv, fig. 10. 

 //ai.— Florissant. U. S. Geol. Expl. Dr. F. V. Hayden. 



AILANTHUS, Desf. 

 •'U. S. Geol. Rep.," vii, p. 294. 



Allan thus louge-pctiolata, sp. nov. 

 Plate XL, Figs. 6,7. 



Leaflets subcoriaceous, narrowly ovate-lauceolate, gradually acumiuate, rounded 

 in narrowing to a long petiole, irregularly obtusely dentate; secondary nerves close, 

 open, curving near the borders or entering the teeth ; tertiary nerves thinner, nearly as 

 long as the secondary; uervilles at right angles. 



The leaflets, 10 centimeters long and 3 broad in the middle, are a little 

 smaller than those of Ailanthus driandroides, Heer, " Fl. Tert. Helv.," 

 pi. cxxvii, fig. 32, which has the same form and an analogous nervation. 

 In the American leaf most of the secondary nerves seem to enter the 

 teeth or to run to the borders ; but in the upper part of the leaves, where 

 the borders are more distinct, the nerves are evidently camptodrome. It 

 is a mixed nervation, same as seen upon the leaflet of Heer, I. c. The leaf 

 however represents a different species, the teeth being obtuse and the petiole 

 very long, too long for a leaflet of Ailanthus, except if it should represent 

 a terminal one. The lower or basilar tooth on the leaflet is protruding 

 outside and apparently glandulose, a peculiar character of ^.^^antZwZosa so 

 generally cultivated now. Fig. 7 may not represent the fruit of the same 

 species, though I have not seen any other leaf from the same locality which 

 could be referred to this genus. The samara is equally winged on both 

 sides of the seed, oblong, obtuse at both ends, slightly constricted in the 

 middle. The fruit has a close affinity to that of Ailanthus recognita. Sap., 

 " Et.," i, p. 105, pi. viii, fig. 7. 



iTai.— Randolph Co., Wyoming. U. S. Geol. Expl. Dr. F. V. Hayden. 



MTRTACE^. 



" U. S. Geol. Rep.," vii, p. 29G. 



EUCALYPTUS, Heer. 



Eucalyptus Americana, Lesqx. 



Ibid., p. 29G, pi. lix, figs. 11,12. 



