290 GEOLOGICAL SURVEY OF THE TERRITORIES. ’ 
sant, and among them many are referred to species from foreign tertia- 
ries. Urticacea are the most numerous of all plants; three species of 
Ulmus occur, U. tenuinervis Lesq., peculiar to Florissant, U. Braunti Heer, 
and U. Fischert Heer, both found in the European Tertiaries; of Celtis 
there are leaves having a close affinity to the existing C. occidentalis 
and its variety integrifolia Nutt.; they may, however, represent two 
species; a single species of Ficus represents a European form, F. lan- 
ceolata Heer; but the mass of specimens—nearly or quite one-half of 
all that have been brought from this locality—represent species of Pla- 
nera; Lesquereux states that he has at least two thousand specimens 
of “leaves of Planera longifolia [Lesq.| and of its varieties, which come 
near Planert Ungeri [Ettingsh.], and perhaps another species of the 
same genus.” The Juglandaceae are represented by single specimens 
of Juglans thermalis* and Pterocarya americana, besides species of Pal- 
aeocarya and Engelhardtia. The six Cupuliferae recorded are all Euro- 
pean species, viz: Quercus neriifolia Al. Br., Q. drymeja Ung., Q. salicina 
Sap., Y. antecedens Sap., Carpinus grannis Ung., and C. pyramidalis Heer. 
The Myricaceae are the next most abundant type after Planera, being 
represented especially by Myrica acuminata Ung., and Callicoma micro- 
* phylla Kttingsh. (a true Myrica), both European species; there are, be- 
sides, no less than seven other species of Myrica, one of them referable 
to the European species, M7. Ludviigt Schimp., another to a variety, acuti- 
loba, of another European species, M. latiloba Heer; but the others 
new and either considered allied to M. Zacchariensis Sap. and M.arguta 
Sap. of the beds at Aix in Provence, or described under the names 
M. Copeana, M. Bolanderi, and M. insignis ; of the last, two specimens 
are mentioned; of the other two, only one. Of Betulaceae, Betula and 
Alnus are represented by a single species each, Betula dryadum Brongn. 
and Alnus Kefersteintti Gopp., both again European forms; cones of the 
latter are found. Salicaceae are tolerably abundant, Salix and Populus 
being represented by four species each; the four species of Salix are all 
identified as belonging to forms previously described from Europe or 
Alaska, viz: S. Lavatert Heer, S. integra Gopp., S. media Heer, and S. 
varians Gopp.; one species of Populus is referred to P. latior Al. Br., of 
the variety represented by Heer as denticulata ; two others are consid- 
ered new, one belonging to the section of P. glandulifera Heer ; while the 
fourth, represented by a large number of leaves, very variable, espe- 
cially in size, is considered as identical with P. Heerii Sap. of the gypsum 
beds of Aix. Finally, of undetermined plants in this group there is a 
species of Trilobium, and a Carpites, described as C. Pealei. 
Among the Coniferae there is considerable variety, five species occur- 
ring, of four genera, all but one of the species represented in the Euro- 
pean flora. There is, first, Pinus palaeostrobus? Ettingsh.; next, well- 
preserved branches of Taxodium distichum miocenicum Heer; and abun- 
dant remains of Glyptostrobus Europaecus Heer; as well as two species of 
Sequoia, 8. Langsdorfit Brongn., and S. affinis Lesq. The presence of 
the last-named genus is also well attested 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 Palms, a large specimen of a Sabal related to Sabal major Ung. 
of the European miocene; of the Araceae, Acorus brachystachys Heer, first 
described from Spitzenberg; of the Typhaceae, finely preserved leaves 
of a Typha; of the Naiadaceae, two species of Potamegeton ; of the 
Iridaceae, well-preserved leaves of an Iris; of the Gramineae, ‘two frag- 
#66 
_”* “Hot Springs, Middle Park,” is the locality given in the text of Lesquereux’s Ter- 
tiary Flora, but in the table, p. 327, it is also credited to Florissant, 
