KNowLTON.] DESCRIPTION OF SPECIES. 47 



Locality. — Bridjifc Creek, Oreoon. Colloctcd by Rev. Thomas Con- 

 don (U. S. Nat. Mu.s., No. TUol) and Maj. Charles E. Bcndire (U. S. 

 Nat. Mils., Nos. 9229, 9250, 9253, 9266, 9274, 9292, 9307, 9309, 9317, 

 9319, 9326, 9334, 9343, 9355, 935S, 93«)5, 93r)8, 9372, 9374). Types of 

 original American ligured specimens in Mus. Univ. Cal., lig. 1, No. 

 1767; fig. 2, No. 1768; fig. 3, No. 1769; fig. 4, No. 1770; fig. 5, No. 

 1771; fig. 6, No. 1772; fig. 7, No. 1773. Ofiicer's ranch, lower end 

 of Butler Basin. Collected by Dr. John C. Merriam, July 22, 1901 

 (U. S. Nat. Mus., No. 9204). 



QUERCUS OREGON: AN A. n. Sp. 



PI. VI, %P. 2, 3; PI. VII, tig. 1. 



QnERcr8, n. sj>., Knowltoii in Merriam, Univ. Cal., Bull. Dept. Geol., Vol. II, No. 9, 



p. 288, 1901. 

 Fopuhin poli/morpha Newb., in part. Proc. U. S. Nat. Muh., Vol. V, p. 506; Later 



Extinct Floras, p. 50, PI. XL VI, fig. 4 (not the other figures of P. polymorplia). 



Leaf membranaceous in texture, elliptical-ovate or slightly elliptical- 

 obovate in shape, rather abrupth' rounded at base, obtusely acuminate 

 at apex; margin coarsely and irregularly toothed, the teeth rounded 

 or somewhat acute (petiole not preserxed) ; midrib rather slender, per- 

 fectly straight; secondaries 8 or 9 pairs, alternate, arising at an angle 

 of 45° or 50°, nearly straight, ending in the larger marginal teeth, 

 often with one or two branches on the lower side, which also pass to 

 the marginal teeth; the secondaries in the lower part of the blade 

 closer than those above and at a less angle; nervilles numerous, per- 

 current or broken, approximately at right angles to the secondaries; 

 finer nervation producing a close, irregularly quadrangular network. 



This species is based on two examples, one of which (PI. VI, fig. 2) 

 is the original of one of Newberry's types of Popiilus jpolymorpha^ 

 and the other (PI. YII, fig. 1) a smaller specimen that was identified by 

 Lesquereux as Carpinus hduloldes Unger. The leaves are about 6 cm. 

 in length and 4 cm. in width. The first-mentioned example is nearly 

 perfect, lacking only the petiole, while the other lacks all of the basal 

 portion. The drawing given in Newberr3''s Later Extinct Floras is 

 not quite correct as regards the form, the teeth being uniformly 

 rounded, and the nervation is only partially shown. The other exam- 

 ple has never before been figured. 



I am moved to take this leaf from Newberry's polymorphic aggre- 

 gation for two reasons: First, because it difl'ers from the other forms 

 included under 7^. /_>o/_^/y<''>/7>/'«/ and, second, because I can not believe 

 that it belongs with the genus Populus. It has much more the appear- 

 ance and general facies of a Quercus, and for these reasons has been 

 removed. 



Locality. — Bridge Creek, Oregon. Collected by Rev. Thomas Con- 

 don (U. S. Nat. Mus., No. 7049) and Maj. Charles E. Bendire (U. S. 

 Nat. Mus., No. 8484). 



