FLORA OF THE DAKOTA GROUP. 31 



None of them has a leaf entirely preserved, and thus the upper end of 

 the leaf is undetermined. 



From the decurring base of the leaves the fragment may represent a 

 Sequoia. It has some analogy to S. Smittiana, Heer, "Fl. Arct./' iii, pi. 

 xvii, figs. 3, 4, while Torreya parvifolia and T. Bicksoniana, Heer, ibid., pi. 

 xvii and xviii, have the leaves sessile, and in this last species rounded and 

 enlarged above the point of attachment. The leaves of this fragment, 

 however, are too long for a species ' of Sequoia, also flat, not rigid nor 

 coriaceous, and thus seem referable to Torreya. 



Hah. — Cretaceous black shale, near Golden. Rev, A. Lakes. 



SEaUOIA, Endl. 

 Sequoia Reiclienbaclii, Heer. 



Lesqx., "U. S. Geol. Rep.," vi, p. 51, pi. i, figs. 10, 106. 



The supposed relation of the cone referred to this species is contra- 

 dicted by Professor Heer. Though the cone represents a Sequoia, the 

 specific name is left undetermined. 



Sequoia fastigiata? St. 



Hayden's "Ann. Rep.," 1874, p. 335, pi. iii, figs. 2, 8, 8«. 



Branches slender, erect; branchlets filiform; leaves loosely imbricate, short, 

 broadly lanceolate-acuminate, subfalcate or more or less incurved, costate; strobiles 

 ovate-globose, small. 



The fragments referred to this species are merely two short branchlets, 

 pi. iii, fig. 8, loc. cit., and some indistinct cones imbedded into the stone. 

 The leaves appear to be of the same form as those of this species figured 

 by Heer, "Molet. Fl.," pi. i, fig. 10, generally a little broader and shorter, 

 and the cones have the same character as that of fig. 12 of the same 

 plate. These fragments are also comparable to the species as figured in 

 Heer, "Fl. Arct.," iii, pi. xxvii, figs. 5 and 6, of the Upper Cretaceous 

 of Atane. Professor Heer says, in the first description of this species, 

 "Molet. FL," I. c, that the leaves do not seem to have any medial nerves, 

 and in "Fl. Arct.," loc. cit., he remarks on the difference of the species 

 from S. rigida by the absence of a medial nerve. As the costa is distinct 

 on the leaves of the Dakota Group the relation is doubtful. 



Hah. — Kansas, Clay Centre. H. C. Towner. 



