KNOWLTON.] DESCRIPTION OF SPECIES. 65 



borne out hy the l'elati^'e ages of the beds in which they are found. 

 In size of blade, configuration of margin, and in nervation the two 

 forms are practically identical. 



LocalUiei<. — Bridge Creek, Grant County, Oregon. Collected by 

 Kev. Thomas Condon (Newberry's types, U. S. Nat. Mus., Nos. 7079, 

 7085) and Maj. Charles E. Bendire ("u. S. Nat. Mus., Nos. 2892, 2898). 

 Officer's ranch, lower end of Butler Basin. Collected by Dr. John 

 C. Merriam, July 22, 1901 (U. S. Nat. Mus., No. 9206-9208). 



Platanus nobilis? New)). 



Platanus nobilis? New)). Lesqiierenx, Proc. IT. S. Nat. Mus., Vol. XI, p. 19, 1888. 



The material from Van Horn's ranch contains a single ver}- large 

 leaf which Lesquereux identified with this species. This particular 

 specimen lacks most of the margin, ])ut as nearly as can be made out 

 it was five-lobed and entire, or at most only undulate on the margin. 

 In size it must have been more than 25 cm. long and 23 cm. or more 

 broad. The petiole is preserved entire and is 8 cm. long and 7 mm, 

 thick at the point of attachment to the branch and 4 mm. thick in the 

 middle. The nervation of the leaf is strong. The margin not having 

 been preserved it is hard to be positive of this determination, yet, all 

 things considered, it is possibly correct, although the petiole is stronger 

 than I remember to have seen in this species. Additional material 

 must be awaited for satisfactory settlement. 



Locality. — Van Horn's ranch, al)out 12 miles west of Mount Vernon, 

 Grant County, Oregon. Collected by Maj. Charles PI Bendire (U. S. 

 Nat. Mus., No. 2538). 



Platanus acekoides? (Goppert) Heer. 



Platanus aceroides (Goppert) Heer. Lesquereux, Proc. I^. S. Nat. Mus., Vol. XI, 

 p. 19, PI. V, fig. 7, 1888. 



The two examples identified by Lesquereux as this species are very 

 unlike in size, the smaller — the one figured — being 4 cm. long and a 

 little more than 3.5 cm. broad, while the larger one is 11 or 12 cm. 

 long and 13 cm. or more broad. I am uncertain as to the correctness 

 of this identification. They do have somewhat the appearance of 

 various leaves that have been referred to this species, ])ut they also 

 differ. There is not a sufficient amount of material, however, to war- 

 rant attempting to properly characterize them as new. I have there- 

 fore retained them as above, with the mark of interrogation after the 

 specific name. 



Locality. — Van Horn's ranch, about 12 miles west of Mount Vernon, 

 Grant County, Oregon. Collected by xMaj. Charles E. Bendire (U. S, 

 Nat, Mus,, No. 2535). 



Bull. 204— 02 5 



