168 DESCRIPTION OF SPECIES. 



PIMELE^. 



PIMELEA, Banks. 

 Pimeleii tlelicatula, sp. nov. 



Plat,' XXXUI, Figs. 15, IC. 



Leaves membrauaceous, nearly sessile, spatulate, short ■ poiuted or apiciilate; 

 secondary nerves emerging at an acute angle of divergence, branching on the lower 

 part, variable in distance, separated by intermediate short veinlets; nervation campto- 

 drome. 



The leaves vary from 3 to 5i centimeters long and from 8 to 13 mil- 

 limeters broad in the upper part, near the apex, where they curve upward 

 in narrowing to a short point, and from which part they are gradually 

 narrowed downward to the very short petiole. 



The species is closely allied to P. (Eningensis, Heer, "Fl. Tert. Helv.."' 

 ii, p. 93, pi. xcvii, figs. 2-10, which has smaller leaves less gradually nar- 

 rowed downward and no petiole. 



ifei.— Florissant. U. S. Geol. Expl. Dr. F. V. Hayden. 



OLEACE^. 



OLEA, Linn. 



Of the numerous living species of this genus, one only, Olea Ameri- 

 cana, inhabits the North American Continent; three species are European ; 

 the others are found in Tropical Asia and South Africa ; Japan has one 

 species. 



The leaves of Olea are opposite, petioled,eoriaceous, persisting, oblong- 

 oval, obovate or lanceolate, very entire; the nervation pinnate, and the 

 flowers fasciculate in the axils of the leaves. 



Olea prteiuissa, sp. nov. 



Plate XXXIII, Fig. 1. 



Leaves coriaceous, lanceolate, larger below the middle, narrowed to a very short 

 petiole ; flowers in simple or rarely compound racemes. 



The leaves average 5 centimeters in length and 1 centimeter in 

 width below the middle, from which they are gradually tapering upward 

 to a blunt point. The flowers are short-petioled, either single or in short 

 slightly compound racemes. This character essentially separates this 



