OLEACEAE. 159 



2. Buds blue-black : leaflets sessile : fruit broad, winged 



all around. (European ash). 3. 

 Buds brown : leaflets stalked : fruit narrow, winged 

 principally at the end. n. 



3. Leaves of a single leaflet. F. excelsior monophylla. 

 Leaves pinnate. 4. 



4. Leaflets deeply cut. F. excelsior asplenifolia. 

 Leaflets not deeply cut. 5. 



5. Dwarf and shrubby. F. excelsior nana. 

 Trees. 6. 



6. Weeping. 7. 

 Not weeping. 8. 



7. Twigs gray. F. excelsior pendula. 

 Twigs yellow. F. excelsior aurea pendula. 



8. Twigs yellow. F. excelsior aurea. 

 Twigs gray. 9. 



9. Leaves green. F. excelsior. 

 Leaves variegated. 10. 



TO. Leaves with white center. F. excelsior albo-variegata. 



Leaves with white margin. F. excelsior albo-marginata. 



11. Leaves whitened beneath: fruit rather stout, scarcely 



wing-margined: leaf-scars concave at top. 12. 

 Leaves merely lighter green beneath : fruit slender, 

 the narrow wing continuing to the base : scar- 

 margin not concave. 14. 



12. Glabrous. 13. 



More or less velvety. F. americana Biltmoreana. 



13. Leaves uniformly green above. (White ash). F. americana. 

 Leaves white-margined. F. americana albo-marginata. 



14. Glabrous or nearly so. (Green ash). F. lanceolata. 

 Twigs velvety. (Red ash). F. pennsylvanica. 



FONTANESIA. 



Deciduous shrubs with slender 4-angled twigs ; round ho- 

 mogeneous pale pith ; opposite or obliquely opposite raised small 

 crescent-shaped leaf-scars with i bundle-trace; no stipule-scars; 



