THE FLORISSANT LAKE BASIN. 33 



has seen at least two thousand specimens. The JuglandaeefP are repre- 

 sented by single specimens of Pterocarya americana and Juglans thermalis, 

 besides two other species of Juglans, one of them European, three of Carya, 

 all European, and one Engelhardtia, also European. 1'he Cupuliferaeshow 

 one species each of Ostrya and Castanea, three of Carpiuus, one of them 

 European, and seven of Quercus, of which five are European species. The 

 M3-ricacese are the next most abundant type after Planera, being represented 

 by no less than fifteen species of Myrica, of wliich six are European. Of 

 Betulacea? two species of Betula occur and two of Alnus, one of the latter 

 European. Salicacesie are tolerably abundant; there are four species of 

 Populus, all now regarded as European, though Lesquereux first looked on 

 tliem as new ; and two peculiar species of Salix, besides four identical witli 

 European species. Finally, there are one or two undetermined plants in 

 this group represented by parts of flowers or seeds. 



Among the Coniferaj there is considerable variety, eight species occur- 

 ring, of six genera, most of them represented in the European flora. There 

 are, first, two species of Pinus, one European; a species of Widdringtonia; 

 well preserved branches of a European Taxodium ; abundant remains of a 

 European Glyptostrobus ; a couple of leaves of a European Podocarpus; 

 as well as two species of Sequoia, one European, the other indigenous. 

 The presence of the last-named genus is also well attested by their cones 

 and by the remains of gigantic silicified trunks in an erect position. 



Finally, in the lower orders of plants the following have been found : 

 Of the Palma?, a large specimen of a Sabal and a fruit referred to Palmo- 

 carpon ; of tlie Aracete, a species of Acorns, first described from Spitzen- 

 berg ; of the Typhacea?, finely preserved leaves of a Typha ; of the Naiad- 

 acepe, two species of Potamogeton and one of Najadopsis; of the Lemna- 

 cea?, a species of Lemna; of the Graminefe, fragments of leaves of Phrag- 

 mites ; of Filices, numerous specimens of five genera, Sphenoiiteris, Adian- 

 tites, Lastrpea, Pteris, and Diplazium, the last a European species; of Rhiz- 

 ocarpa^, many specimens of two species of Salvinia ; of Musci, one species 

 each of Fontinalis and Hj-pnum, and of Characeie, two specimens of a 

 Chara. 



According to Mr. Lesquereaux, such an assemblage of [)lants indicates 

 a climate like that of the northern shores of the Gulf of Mexico at our epoch. 

 "The preponderance of conifers, of shrubs, ... of trees of small 



VOL XIII 3 



