OLEACE.E 759 



Leaflets gradually acuminate, 5-11, oblong-lanceolate, the lateral leaflets ses- 

 sile ; flowers polygamous. 6. F. nigra (A, C). 

 Leaves mostly reduced to a single leaflet, rarely 2 or 3-foliolate, branchlets 

 4-sided. 7. F. anomala (F). 

 **Body of the fruit nearly terete ; flowers dioecious ; calyx of the staminate flower minute 

 or (large in 12} calyx of the pistillate flower persistent. 

 Branchlets glabrous. 



Leaflets 5-9 ; wing of the fruit terminal. 



Leaflets usually 7, ovate to oblong-lanceolate, acute or acuminate, pale below. 



8. F. Americana (A, C). 



Leaflets usually 5, ovate to obovate, mostly rounded at the apex, pale below. 



9. F. Texensis (C). 



Leaflets 3-5, oblong-lanceolate, usually acuminate ; wing of the fruit extending 

 down its sides. 10. F. Berlaudieri (E). 



Branchlets and lower surface of the leaflets pubescent (branchlets and leaves gla- 

 brous in one form of 11, leaves sometimes glabrous in 14). 

 Lateral leaflets stalked. 



Wing of the fruit extending down its sides ; leaflets 7-9. 

 Leaflets mostly .coarsely serrate, oblong-lanceolate to ovate. 



11. F. Pennsylvanica (A, C, F). 



Leaflets with usually entire and undulate margins, lanceolate to ovate- 

 lanceolate ; calyx large. 12. F. profunda (C). 

 Wing of the fruit terminal. 



Wing of the fruit linear-oblong ; leaflets 7~9, ovate-oblong to lanceolate, 

 pale below. 13. F. Biltmoreana (A, C). 



Wing of the fruit oblong-obovate. 



Leaflets 3-Q, lanceolate, mostly acuminate, narrowly cuneate at the 



base. 14. F. velutina (E, G, H). 



Leaflets 5, ovate to oblong, acute, broadly cuneate or rounded at the 



base, subcoriaceous. 15. F. coriacea (F, G). 



Lateral leaflets sessile or rarely short-stalked ; leaflets 5-7, oblong to ovate, 



acute at the ends ; coriaceous. 16. F. Oregona (B, G). 



1. Flowers with petals. 



1. Fraxinus cuspidata, Torr. 



Leaves 5'-7' long, with slender pale petioles sometimes slightly wing-margined, 

 and 3-7 lanceolate or ovate-lanceolate leaflets gradually narrowed at the apex into 

 long slender tips, wedge-shaped at the base, and coarsely and remotely serrate above 

 the middle, with recurved teeth, when they unfold slightly puberulous on the lower 

 surface and at maturity thin, dark green above, paler and covered with minute 

 black dots below, l^'-2' long and ^-'-1' wide, with pale midribs and obscure veins, 

 and borne on slender petiolutes sometimes nearly 1' in length. Flowers perfect, 

 extremely fragrant, appearing in April, in open glabrous panicles 3'-4' long and 

 broad, terminal on lateral leafy branchlets developed from the axils of leaves of 

 the previous year; calyx cup-shaped, ^' long, with acute apiculate teeth, deciduous; 

 corolla f ' long, thin and white, divided to below the middle into 4 linear-oblong lobes 

 pointed at the apex, and much longer than the nearly sessile oblong long-pointed 

 anthers; ovary 2-celled, with a thick 2-lobed nearly sessile stigma. Fruit spatulate- 

 oblong or obovate-oblong, 1' long, the margined edges of the flat nerveless body 

 gradually broadening upward into the shorter wing rounded and slightly emarginate 

 at the apex, and \' wide. 



