37 



Alnus sp. 



Fragments of leaves in a very poor state of preservation, found in the collections from 

 Quilchena, apparently represent young leaves of a species of alder whicli cannot be definitely 

 correlated with any recognized type, because of their very fragmentary condition and wholly 

 unsatisfactory character. 



Alnus alaskana, Fewb. 



Bib : Later Ex. Fl. XXXV, 65, pi. XLVIII, f. 8 : Proc. U. S. Nat. Mus., V, 1882, 509 : Cat. 

 Cret. and Tert. PI. 30. 



Leaves of this species are found among the plants obtained by Lambe from the 

 Tulameen river in 1906, and although in most cases imperfect and very fragmentary, one 

 leaf showed the entire base with petiole. 



This species was founded by Newberry, upon material derived from the rKootznahoo 

 archipelago, Alaska, in latitude 57° 35' N., and longitude 134° lii' W. The horizon assigned 

 by Newberry is Miocene, but Knowlton suggests a possible Eocene age. 



Alnus carpinoides, Lesq. 



Bib : Cret. and Tert. Fl. VIII, 243, pi. L. f. 11. 



Leaves of this species, in a somewhat imperfect condition but otherwise well character- 

 ized, were found by Lambe in the beds of the Tranquille river, and also in the Horsefly 

 river. 



As originally described by Lesquereux, this species was obtained from the Miocene 

 formation at Bridge Creek, Oregon. So faf as our present knowledge goes, it does not 

 appear to be either abundant ov a widely distributed species, while its close resemblance to 

 Carpinus grandis, and its evident relation to Alnus macrophylla, as already commented 

 upon by Lesquereux, invest its determination with a certain element of doubt whenever 

 imperfect specimens are to be dealt with, which goes far to impair its value for strati- 

 graphical purposes. It is not unlikely that the specimens so described may be nothing 

 more than badly preserved fragments of one of the species referred to. 



Alnus serrulata fossilis, Newb. 



Bib: Lat. Ex. Fl. XXXV, 66, pi. XL VI, f. 6. 



In Lambe's collection from Quilchena there were three nearly complete specimens 

 of leaves directly referable to Alnus serrulata fossi7?"s of !N ewberry who had already observed 

 this species in the Miocene of the western part of the United States. 



Amygdalus gracilis, Lesq. 



Bib : Cret. and Tert. Fl., VIII, 199, pi. XL, f. 12-15 and XLIV, f. 6. 



In the Quilchena collection of 1906, there were two imperfect specimens of leaves which 

 may be referred with assurance to Lesquereux's Amygdalus gracilis. The type is evidently 

 not an abundant one, since it has not occurred in any other Canadian locality, but Lesquereux 

 records its occurrence in the Green River group of Florissant, Colorado, and also in Uinta 

 county, Wyoming. 



