222 DESCRIPTION OF SPECIES. 



EQUISETACEiE. 



EttUISETUM, Linn. 

 Equisetum globulosuin, sp. nov. 



Plate XLVIII, Fig. :). 



■Rbizoma slender, tbiuly liueate, flexuous or rigid, distantly articulate, bearing 

 simple opposite globular tubercles more or less wrinkled by comijression. 



For a time I was unable to determine the relationship of this fragment. 

 But recently I have found in the collection of fossil plants made by Pro- 

 fessor Wm. H. Ball in Alaska a number of specimens distinctly represent- 

 ing these remains as rootlets or root-stocks of Equisetum. The branches 

 from 1 to 6 millimeters in diameter, irregularly striate, straight or flexuous, 

 distantly articulate, bear at the articulations simple opposite globular 

 appendages somewhat like those of Physagenia Parlatorii, Heer, "Fl. Tert. 

 Helv.," i, p. 109, pi.' xlii, figs. 2-17, but globular and generally simple, 

 very rarely appendiculate in pairs. These remains, much decomposed 

 by maceration, are fragmentary, none of them continuous, and all without 

 trace of sheath. Though much smaller and globular, they may represent 

 ihe same species as the fragment in Newby., "Illust.," p. vii, fig. 4, which 

 he mentions as radicle iwhQV^ oi Equisetum. 



Hab. — Bad Lands. Professor Wm. Denton. 



CONIFERS. 



GLYPTOSTROBUS, Endl. 

 Glyptostrobiis europseiis, var. Ungeri, Heer. 



Plate XLVI, Figs. 1-lc. 



Heer, "Fl. Tert. Helv.," iii, p. 159; "Fl. Foss. Alask.," p.22, pi. i, fig. 7, b. f. 



Leaves squamiform, a})pressed, obscurely costate on the back, becoming longer, 

 narrower, linear and two-ranked in the upper part of the branches. 



The figured specimen shows the species as it is represented by Heer in 



the "Alaska Flora." I still believe that two species are represented by the 



American specimens — one by those figured from Florissant, pi. xxii, and 



the other by those of the Bad Lands. Fig. i of pi. xlvi is, however, very 



similar to the lower part of the branches of fig. 2 of pi. xxii. The speci- 



