222 CNITED STATES GEOLOGICAL SDR VEV— TERTIARY FLOKA. 



DAPHNOGENE, Ung. (emend.). 



The leaves referred to this genus are similar in form to those of the 

 narrow-leaved Cinnamomum. The}' are described as entire or (rdohate, tripU- 

 nerved, with the lateral nerves sub- or suprabasilar and tlte branches distant, 

 catnptodro77ie or brachiodrome. 



Dapliiiogene anglica, ? Heer. 

 riate XXXVII, Fig. 9. 



I>aphnogene avgllca, Heer, Fl. Tert. Helv., iii, p. 315 (uote). 

 Daphnogene anfiUcaf, Lesqs., Aunual Report, 1H7:?, p. 401. 



Leaf lauceolate-acuniinate ; lateral veins subbasilar, aerodrome, distant from the borders, and 

 distantly ramose; iiervilles close, in riglit angle to the nerves, distinct. 



Prof Heer briefly describes the leaves of this species, not figured, as 

 ovato-lanceolate,. long-acuminate, triple-nerved; middle nerve and secondary 

 ones branching. Our leaf is only lanceolate; the midrib is not branching, 

 though another fragment has some branches, and even, in the one figured 

 here, some thin branchlets appear, cutting obliquely the nervilles in the 

 upper jiart of the leaf The evidently aerodrome nervation of the specimen 

 of fig. is not seen upon any of the species of Daphnogene described and 

 figured liy European authors except in D. Kaiiii, Heer (Fl. Foss. Arct., 

 p. 112, pi. xiv, xvi, fig. 1), whose reference to this genus is doubtful. It 

 is therefore probable that, as Saporta supposes, this leaf ma}' represent a 

 Zizyphus or a Ceanothus; but I do not find in any of these generic divisions 

 a species to which it is. seemingly related. 



Habitat. — Golden, Colorado {Capt. Ed. Berthoud). 



GAMOPETALJl 

 L ON ICE 11 E^. 



VIBURNUM, Linn. 

 This genus, which counts at our epoch more than fifty species, has its 

 origin marked in the Eocene; at least, no Viburnum leaves have been described" 

 until now from the Cretaceous.* The largest number of its living species 

 belongs to Asia, twenty-four; North America has twelve; Japan, five: Europe, 

 only three: a remarkable diflerence with the Tertiary flora of the same 

 country, from which at least ten species have been described. 



* Count Saporta finds, however, a remarkable affinity between a species of the Dakota group, 

 AmpehiihyUitm a//CTiHo<Mm, Lesqs. (Annnal Keport, 1M74, p. ii54, ])1. ii, fig. 3), and somojeaves, described 

 by himself as Vibuniiiin inlifulUim, from the Lower Eocene of Gtlinden. This relation is ]i<iinti'd out iu a 

 letter of the celebrated author, his work, a second volume of the Flora of Gelinden, being now in course 

 of publication. 



