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FOSSIL FLORA. 703 



the Auriferous <irav('ls of Califoruiu referred l)y Le.s(juereux to Cdvtai/ea 

 iiiifjcri Heer/ InU a careful study of tlie Yellowstone National Park material, 

 coiuitrising- nearly 100 si^'cinuMis, and of a iine coUeetiou from Inde- 

 pendence Hill, Placer County, California, has convmced me that tliev are 

 distim-t, althouu'h closely related. The C'alifornia s})eeies diflfei in havino' 

 a shorter petiole, in the wedge-shaped base lieing destitute of teeth for a 

 greater distance, in having serrate margins lather than Castanea-like teeth, 

 anil in luiving in general closer secondaries. This stuth' has also l)rought 

 ut the fact that Lesijuereux could hardlv have been correct in identifying 

 the California specimens with Castxuwa itngerl as iigured by Heer- from 

 Alaska. As already stated under Fagus undulata (|). 700), it is more than 

 probable that "2 of the leaves figui-ed b}' Heer (loc. cit., PI. YII, figs. 1, 2) 

 should be restored to Fagus, and the other is certainly specificalh' distinct 

 from the ( 'alifornia leaves. The California specimens, as stated, differ also 

 from the Yellowstone National Park species, and should proliablv be given 

 a new name. 



Tves(|uereux identified'' as Qitcrcus drj/iiicja Ung., a single leaf from 

 ih-idge Creek, Oregon, that nuist certainly be the same as Castanca ludrhrUa. 

 It is, for example, absolutely indistinguishable from fig. 7 of PI. LXXXYI 

 and fig. 2 of PI. XXXVII. A comparison of certain of the European figures 

 of Q. (Iri/iiicja makes it more than j)robable that it was not correctly identified 

 among the Bridge Creek material. The leaf figured l)y Lesquereux is 

 referred to C. pulcheUa, and Q. drymeja should l)e stricken from the west- 

 coast flora, at least so far as it depends on this particular specimen. 



It was at first thought best to separate the small leaves rejaresented in 

 fig. 7 of PI. LXXXYI and figs. 2 and 3 of PL LXXXYII, as a distinct 

 species, Init the only difierence is one of size, and in the large series at hand 

 this breaks down. All gradations from the smallest to the largest may )je 

 found, which is quite in accord with the well-known difierences in size of 

 leaves to be found on living Castanea. 



Habitat: Fossil Forest Midge, Yellowstone National Park, Ijed No. 7, 

 altitude about 7,250 feet; collected by Lester F. ^Yard and F. H. Knowlton, 

 August 16-20, 1.S87. Yellowstone River, one-half mile below mouth of Elk 



'Ciet. and Tert. FL, p. 246, PI. LII, figs. 1, 3-7. 



■-F1. Foss. Arct., Vol. II (Fl. Foss. Alask.), p. 32, PI. \'II. figs. 1-3. 



sCret. aud Tert. Fl., p. 245, PI. LIV, tig. 4. 



