KNowLTON] DESCRIPTION OF SPECIES. 79 



thin, straight; secondaries few, thin, alternate; tiner nervation not 

 preserved. 



The single example iigured is all that can with certainty be referred 

 to this form. It consists of a portion of the upper part of a rachis 

 with two leaflets, neither of which is the terminal one. The lateral 

 ones are alternate and ol)tusely ovate in shape. 



This species resembles certain of the smaller examples referred to 

 S. ohtmlfoHus Lesq.," and may possibly be this, but it is smaller and 

 has a thinner secondar}- nervation. 



Locality. — Bridge Creek, Oregon. Collected for the University of 

 California. Type in Mus. Univ. Cal., No. 2500. 



Sapindus obtusifolius Lesq. 



Sapinihs obtusifolius Lesq., Tert. FL, p. 266, PI. XLIX, figs. 10, 11, 1878; Cret. 

 and Tert. FL, p. 235, PI. XLVIII, figs. 5-7, 1883. 



A single example that seems to belong to this somewhat varia])le 

 species. It is more like the examples figured from the Green River 

 group, having the narrow shape, thick midrib, and very short petiole 

 of those. 



LocaJity. — Van Horn's ranch, a1)Out 12 miles west of Mount Vernon, 

 Grant County, Oregon. Collected b}" Merriam's expedition of 1900 

 (Mus. Univ. Cal., No. 892). 



Sapindus angustifolius ? Lesq. 



Sapindus angustifolius Lesq., Proc. L^. S. Nat. Mus., Vol. XI, p. 15, 1888. 



The single example referred by Lesquereux to this species remains 

 unique. I should incline to place it in Salix, yet, as it is obscurely 

 preserved, I have permitted it to remain as above, but have questioned 

 the correctness of the reference. 



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

 Grant County, Oregon. Collected by Maj. ('harles E. Bendire (U. S. 

 Nat. Mus., No. 2698). 



Sapindus okegonianus n. sp. 



PI. XV, fig. 3. 



Leaflet coriaceous in texture, elliptical or elliptical-obovate, very 

 unequal-sided -M base, apex destroyed; margin perfectly entire; petiole 

 short, thick; midrib very thick; secondaries thin, about twelve pairs, 

 emerging at a low angle, parallel, camptodrome, each arching and 

 joining the one next above; nervilles very irregular, producing large 

 areas between the secondaries, which are tilled by the ver}^ fine ulti- 

 mate nerv^ation. 



a Tert. FL, p. 266, PI. XLIX, figs. 8-11, 1878. 



