776 GEOLOGY OF THE YELLOWSTONE NATIONAL PARK. 



the fossil remains, as the former species, but it was ai)iiarently quite widely 

 distributed. Tlie other species had smaller 3 or 5 lol)ed leaves. 



The family Lauracea^ Avas strongly represented by 5 genera, 11 species, 

 and a large numl)er of examples. The genus Laurus, which is now exclu- 

 sively an Old World group, was represented by 6 well-marked species. The 

 genera Malapoenna or Litsea and C-innamomum, otlier Old World forms, 

 were both represented, the former by 2 and the latter by 1 species. The 

 genus Persea, an extensive Old World genus, w^ith species also in tropical 

 America and the southern United States, was represented ^^\ 1 species, 

 which is closely related to a small tree now living in the South. 



Another large and important group, now entirely ixnrepresented in the 

 Park, is the Fagacea*, emljracing 2 species of Fagus, 1 of Castanea, 11 of 

 Quercus, and 1 of Dr3"ophyllum. The Fagus here described is a beautiful, 

 characteristic leaf and was evidently rare, as only a few examples were 

 obtained. The Castanea, on the other hand, was very al^undant and 

 widely distril^uted Avithin the Park. The leaves are large, and as handsome 

 and striking as are the leaves of tlie living species. Tlie oaks, however, 

 were aliundant in species and usually in individuals, and all but 3 proved 

 to be new tr» science. Perhaps the most marked are Quercus yanceyi, 

 Q. cidvcrl, and Q. </ross/(lcj/tata. 



The family Urticacea, which is represented in the living flora liv a 

 single rare herb (JJrtica r/racilis), was represented during Tertiarv times by 

 some 10 species of Ficus and a single more or less doiilitful species of 

 Artocarpus. Several of the hgures are represented b}' a large number of 

 si^ecimens — as, for example, Ficus densifoUa — Ijut most of them were rare, at 

 least as evidenced by the fossil remains. It is of great interest to learn, how- 

 ever, that the\- were once present in a region that has long since ceased to 

 support them. The curious leaf referred provisionally to Artocarpus is 

 also of much interest as indicating the possible presence of the bread-fruit 

 trees in this portion of the American Continent. Two unmistakable species 

 of Artocarpus have already been detected, 1 from the Laramie and Denver 

 beds of Colorado, and the other from the Auriferous gravels of California 

 and the Miocene of (Jregon. It is therefore not im])i-ol)alde.that this type 

 was in existence in the Yellowstone National Park during the early Tertiar}^. 



The familv Leguminosa, now represented by a host of small herbaceous 

 plants, was then represented by 3 species of Acacia and 2 of Legu- 



