118 THE LATER EXTINCT FLORAS OF NORTH AMERICA. 



nerves, terminating all in the margins, form a character which the Lanrels 

 never have. 



Of described species it most resembles Weber's B. Decheni (Palseontogr. 

 Vol. II, p. 204 [90], PI. XXIII [VI], fig. 2), but differs from it in having 

 an ovate, lanceolate form, and the nervation is a little more crowded. 



Formation and locality : Cretaceous (Laramie group). Belmont, Colorado. 



Rhamnus Eridani Ung. 

 PI. XL VIII, fig. 7 

 Gen. et Sp., PI. Foss. (1850), p. 465. 



The leaf represented in fig. 7 is unique in the collection made at Bridge 

 Creek, Oregon, but though imperfect it is very distinctly marked, and 

 apparently belongs to the genus Rhamnus, and so closely resembles some 

 of the figures of Rhamnus Eridani Ung., especially that described in Fl. 

 Foss. Arct , Vol. I, p. 123, PI. XLIX, fig. 10, that I have not felt justified 

 in regarding them as distinct. 



Formation and locality : Tertiary (Miocene). Bridge Creek, Oregon. 



Rhamnites concinnus Newb. 



PL XXXIII, figs. 7 (8?). 1 

 Ann. N. Y. Nat. Hist., Vol. IX (April, 1868), p. 50; Ills. Cret. and Tert. PI. (1878), 

 PI. XVI, figs. 7, 9 (fig. 9 under Viburnum asperum). 



"Leaves petioled, long ovate, acute, rounded at the base, coarsely and 

 nearly equally mucronate-dentate ; nervation pinnate, remarkably precise 

 and parallel throughout; medial nerve straight; lateral nerves, nine to ten 

 pairs, diverging at an angle of about 20 degrees, slightly arched upward, 

 parallel among themselves, basilar pair reaching to margin below the mid- 

 dle of the leaf, sending off each about eight short, simple, slightly curved, 

 parallel branches to the dentations of the baso-lateral margin; superior 

 lateral nerves simple, or once-forked at the summit; tertiary nerves very 

 numerous, simple, parallel, connecting the lateral secondary nerves and 

 the branches of the basilar nerves nearly at right angles." 



Collected by Dr. F. V. Hayden. 



1 The description applies without doubt to fig. 7, but does not agree with fig. 8. This latter 

 specimen, however, is plainly labeled in Dr. Newberry's handwriting as belonging to this species, 

 although it would appear to be more logical if allied with fig. 9, same plate ( Viburnum asperum 

 Newb.)— .A. H. 



