ABT.23 THE ESMEEALDA FORMATION BEERY 13 



Order SAPINDALES 

 Family SAPINDACEAE 

 Genus SAPINDUS Linnaeus 



SAPINDUS LANCIFOLIUS Lesanereax 



Plate 2, fig. 2 



Sapindus lancifoUus Lesquereiux, U. S. Geol. Surv. Terr. Kept., vol. 8 

 (Cretaceous and Tertiary floras), p. 182, pi. 32, figs. 3-6, pi. 37, fig. 9, 

 1883.— Knowlton, U. S. Nat. Mus. Proc, vol 51, p. 283, 1916. 



This species was described from Florissant, Colo., to which locality 

 it has hitherto been confined. Similar leaflets are present in the 

 Esmeralda formation, the only observable difference being the shorter 

 petiolule of the latter. It is undoubtedly a Sapindus and not suffi- 

 ciently distinct from the Florissant form to warrant considering it 

 to represent a different species. 



The genus is an old one, found throughout North America in the 

 older Tertiary and abundant at Florissant and in the Mascall beds 

 of Oregon during the Miocene. The existing species number about 

 40, widely distributed through the Tropics of both Hemispheres, most 

 abundant in the Asiatic region, and extending for considerable dis- 

 tances into the temperate zone, as in the case of the three species 

 found in the United States, one of which {Sa'pindus druminondi 

 Hooker and Arnott) is found as far north as southern Kansas, New 

 Mexico, and Arizona. 



Occurrence. — Coal prospect 4 miles southeast of Morgan Ranch 

 and 15 miles west of Hawthorne, Mineral County, Nev. 



Plesiotypes.— Cat. No. 37306, U.S.N.M. 



Order MYRTALES 



Family HYDROCARYACEAE 



Genus TRAPA Linnaeus 



TRAPA AMERICANA Knowlton 



Plate 2, figs. 5, 6 



Trapa americana Knowlton, U. S. Geol. Surv. 18th Ann. Kept., pt 3, p. 



733, pi. 102, fig. 7a, 1898. 



Trapal occidentalis Knowlton, U. S. Geol. Surv. 18th Ann Rept., pt 3, p. 



734, pi. 102, fig. 7&, 1898. 



This species was described by Knowlton from the Payette forma- 

 tion near Idaho City, Idaho. He fancied that he had representatives 

 of two distinct species, but in the light of the abundant remains now 



