28 SILVA OF NORTH AMERICA. 
CONSPECTUS OF THE NORTH AMERICAN SPECIES. 
Ornus. Flowers with ‘a 2 to 4-parted corolla, polygamous or often perfect; panicles loose, 
terminal or axillary on leafy branches of the year, or from the axils of leaves of the 
previous year. 
Divisions of the corolla, 4; leaflets, 3 to 7; lanceolate or ovate-lanceolate, gradually 
narrowed into cuspidate tips, sharply serrate or entire 
Divisions of the corolla, 2; leaflets, 3 to 9, oval or oblong, obtuse or acute, 
coarsely serrate above the middle . . . . . . . 1. we ee ee 
Leaflets 3 to 7, usually 5 or 7, narrowly spatulate to oblong-obovate, obtuse; 
petioles wing-margined . 
FRAXINASTRUM. Flowers apetalous, diwcious, polygamous, or rarely perfect; panicles 
compact, developed from separate buds in the axils of leaves of the previous year. 
Flowers perfect. 
Leaflets 5 to 9, usually 7, ovate-oblong to lanceolate, acute, coarsely serrate; 
branchlets quadrangular . . . . . . . . 1 ee en 
Flowers polygamous. 
Leaflets 7 to 11, oblong-lanceolate, gradually acuminate, the lateral sessile . 
Leaflets mostly reduced to a simple leaflet or rarely 2 or 3-foliolate . 
Flowers dicecious ; calyx of the staminate flower minute or wanting; calyx of the pistil- 
late flower persistent. 
Anthers linear-oblong. 
Leaflets 3 to 9, lanceolate to oval, entire or serrate, the lateral short-petiolulate or 
subsessile sek eee oe ee eG 
Leaflets 5 to 9, usually 7, ovate to oblong-lanceolate, mostly acute, pale on the 
lower surface . ok ee eee ee 2 ee ee 
Leaflets usually 5, ovate to broadly oval, rounded or slightly acute at the apex, 
pale on the lower surface : ea ae ae ne 
Leaflets, 7 to 9, oblong-lanceolate to ovate, mostly coarsely serrate, clothed on the 
lower surface with velvety pubescence or sometimes, in var. lanceolata, glabrous 
Leaflets 3 to 5, oblong-lanceolate, acute or rounded at the apex, entire or coarsely 
serrate i 
Leaflets 5 to 7, ovate or oblong, acute, sharply serrate or entire, glabrous or 
pubescent 4 St we ee ee ee ee ee ee Se 
Anthers short-oblong. 
Leaflets 5 to 7, oblong-lanceolate to oval, acute, usually villous-pubescent while 
young -« «+ «© «© #« # + «© « « 
13. 
OLEACE. 
- CUSPIDATA. 
+ DIPETALA. 
. GREGGII. 
- QUADRANGULATA. 
- NIGRA. 
- ANOMALA. 
- VELUTINA. 
. AMERICANA. 
. TEXENSIS. 
. PENNSYLVANICA. 
. BERLANDIERIANA. 
. CAROLINIANA. 
. OREGONA. 
