GEOLOGICAL SURVEY OF THE TERRITORIES. 385 



Carhon Station, Wyoming Territory. 



The specimeus obtained at Carbon are from the same limited area, 

 but from two different levels. In order to mark difference of vegetatiou 

 according to horizontal station, these specimens are described separately. 



1st. From below the main coal,* in a soft-grained, very hard shale, 

 irregularly breaking by cleavage, but where the vegetable remains are 

 distinctly preserved, some of them are of large size. 



Equisetum Haydenii, Lsqs., Kept. 1S71, p. 284. 



The specimens represent some rootlets and tubercles of this species. 

 One of the tubercles split lengthwise in the middle exposes a central 

 solid axis IJ mill, thick, while the parietes or intervals from the axis to 

 the borders, 4 mill, each side, appear formed of a spongy though com- 

 pact cellular tissue, becoming more compact and darker-colored near 

 the borders. A cross-section of another tubercle shows it to be oval or 

 somewhat flattened by compression, 12 mill, in one direction and only 9 

 mill, in tbe other. Another specimen has a linear rootlet or stem 

 whose main axis is 4 mill, wide, apparently central, and surrounded by 

 cellular tissue of equal thickness. It is marked by distant nodi with, 

 round scars of the same form as those of Equisetiim Haydenii, and is 

 referable to this species. 



Smilax grandifolia, Uug., Ohl. PI. XL, Fig. 3. 



The leaf which I refer to this species is of the same size as the one 

 figured by Unger in the Sillog., PI. II, Fig. 8 ; but it has only 7 basilar 

 veins, while Unger's leaf has 9. The same form as ours is published by 

 Heer in Fl. Tert. Helv., PI. XXX, Fig. 8 and 86. A variable species. 



ACORUS ERACHYSTACHYS, Heer. 



Exactly the same form as described in Eept. 1871, p. 288, from Ores- 

 ton. It is represented by three specimens which merely differ from the 

 Spitzberg ones by shorter and broader spadices, 5 mill, broad, 7 mill, 

 long, with only four rows of flowers or ovaries ; the stem, too, is nar- 

 rower, scarcely 5 mill, broad. 



Caulinites sparganioides, sp. nov. 

 Described with better specimens from Black Butte. 



PoPULUS ARCTICA, Heer, Arct. FL, p. 100, «Scc. 



This species is represented at Oarbon in most of its numerous varie- 

 ties, with nearly round and entire leaves, or with undulate or more or 

 less creuate borders, &c. They positively prove that the leaves named 

 Fopulus siihrotunda, Lsqx., in Am. Jour. Sci. and Arts, 1868, p. 205, as 

 also those described as P. Nehrasccnsis, Newb., in Notes on extinct 

 floras, p. G2, belong to this species. 



POPULUS DECIPIENS, ftj). UOV. 



Leaves broadly rhomboidal or round, enlarged in the middle, abruptly 

 narrowed into a very obtuse point, rounded or broadly wedge form to 



* See section of Carbon in lii-st part of this report. 

 25 G S 



