42 FOSSIL FLORA OK THE JOHN DAY BASIN, OREGON. [nviA..20i. 



AlATS CAIM'INOIDES LoSCj. 



AliMs tAKi'ixV()iJ)KS Les(j., Cret. and Tert. Fl., p. 1*4:!, 1*1. L, lig. 1 1; 1*1. J J, lif^.s. 4, 4% 

 5, 1883. 



All collections from Bridge Creek contain a large number of leaves 

 of this species, which has been well described and figured by Lesquereux. 



Locality. — Bridge Creek (types in Mus. Univ. Cal., No. 1759, ligs. 

 -i, 4''; 1764, fig. 5). One and one-half miles east of Clarnos Ferry. 

 Collected by Merriam\s expedition of 1900 (Mus. Univ. Cal., Nos. 931.) 

 One-half mile northeast of Fossil. Collected by Merriam\s expedition 

 of 1900 (Mus. Univ. Cal., Nos. 923, 928). 



Alnus sekrulata fossilis Newb, 

 Alnus serrulata fossilis Newb., Later pyxtinct Floras, \>. Cy6, PI. XLVI, fig. 6, 1898. 



The example figured b}" Newberry as the type is the only one that 

 has thus far been found, with the exception of a single somewhat doul)t- 

 ful example obtained by the University of California. 



LocdJity. — Bridge Creek, Grant County, Oregon. Collected by 

 Eev. Thomas Condon (U. 8. Nat. Mus., No. 7091). 



Alnus macrodonta, n. sp. 

 PL IV, fig. 1. 



Leaf of firm texture, ovate-cordate in shape, abruptl}' rounded be- 

 low to a heart-shaped base and narrowed above to an apparently 

 obtusely acuminate apex; margin coarsely and irregularly dentate, 

 the teeth all obtuse; midrib thick, especially in the lower half of the 

 blade; secondaries about 9 pairs, the two lower pairs sub-opposite and 

 at a right angle, other secondaries at varying angles and distances, 

 all more or less curving upward, craspedodrome and often with several 

 branches in the lower side, which pass to marginal teeth; nervilles 

 numerous and prominent, usually percurrent and rather oblique to the 

 secondaries; finer nervation producing a copious, irregularly ([uadran- 

 gular network. 



This species is based on the single example figured. It lacks, as 

 may be seen, a consideraVde portion of one side and all of the apex. 

 It is broadly ovate, with abruptly truncate, heart-shaped l)ase and 

 coarsely dentate margin. The length was about 7 cul and the width 

 about 5.5 cm. 



Locality . — ^v'x^^Q Creek, Oregon. Collected by Maj. Charles E. 

 Bendire (U. S. Nat. Mus., No. 8551). 



Alnus sp?, fruit of, Newb. 



Alnus sp?, fruit of, Newb., Later Extinct Floras, p. 67, PI. XLVI, fig. 7, 1898. 

 Locality. — Bridge Creek, Grant County, Oregon. Collected l)y 

 Rev. Thoma.s Condon (U. \\. Nat. Mus., No. 7093). 



