GREENE PTELEA IX THE WEST AND SOUTHWEST. 



obovate, 2-3 cm. long, acute, Bubentire; aa- 

 maraa very small, suborbicular, 1 cm. Long. 

 Samaras not so small (excepl m No. 22), but 

 body in all large in proportion, and broader 

 than the average breadth of the wing. 

 Leaflets strongly glaucous on both fares, 

 small petiolulate, lanceolate, crenulate, 4 

 cm. long; samaras orbicular, L.5 em. 

 broad, emarginate. 

 Leaflets light scarcely bluish green above and 

 punctate, pale and villous beneath, odd one 

 cuneate-obovate, 4 cm. long, obtuse; sama- 

 ras round-obovate, L.5 cm. Long, emarginate. 

 Leaflets dark blue-green, glaucous beneath, 

 glabrous, odd one 7 cm. Long, ovate-rhom- 

 boid, acute, doubly serrate-dentate; sama- 

 ras round-obovate, 2 cm. long. 

 Leaflets as in 24 in all hut the outline, be- 

 ing narrow, laneelate, 7 cm. long; samaras 

 oval, often 3-\vinged, remarkably smooth. 

 Leaflets of a deep scarcely bluish green 

 above, very pale beneath with bloom and 

 a fine pubesence, odd one rhombic-lanceo- 

 late, »> cm. Long; samaras broadly ovate or 

 oval, acutish, at base truncate. 

 UPPEB face of foliage light-colored, never deep bluish 

 green, in a few species glaucescent, in most of a clear 

 bright green; samaras in all with broad wing. 

 Leaves in maturity hard and subcoriaceous. 



Leaflets strongly gland-dotted, odd one 6 cm. 

 long, ovate-elliptic, acute at base, blunt at apex; 

 samaras round-obovate, 1.5 cm. long, retuse. 

 Leaflets less notably dotted, odd one 7 cm. long, 

 narrow-obovate, acutish; samaras nearly orbic- 

 ular, 1.7 cm. long. 

 Leaflets nearly dotless, light green and polished 

 above. 5 cm. long, obovate, obtuse; samaras 2 

 cm. broad, not as long. 

 Leaflets fine-dotted, deep green and polished, odd 

 one cuneate-obovate, 5 cm. Long, eremite, ob- 

 tuse or retuse. 

 Leaflets Lance-elliptic, 5 cm. long, subequal, long- 

 pointed, Bubentire; samaras orbicular, 2 cm. 

 broad, much dotted. 

 Leaflets dull with a short Boft pubescence, odd 

 one 5 cm. long, elliptic-lanceolate, very acute; 

 samaras suborbicular, 1.7 cm. long, not as broad, 

 not much dotted. 

 Leaves in maturity only firmly membranaceous, at 

 earlier stage very thin. 

 Leaflets rich deep green above, pale-tomentuloae 

 beneath, odd one 6 cm. Long, broad-lanceolate, 

 acute; Bamaras round-oval, 2 cm. long. 

 Leaflets bright light green above, pale beneath, 

 odd one lance-rhomboid, ti cm. Long, acutish; 



21 . /'. parvuia. 



'1-2. /'. : //"'"-". 



23. /'. montieola. 



24. P. betulifolia. 



25. P. (ittrita. 



26. P. wimZtt. 



27. /'. polyadi nxa. 



28. /'. aboriginum. 

 2". /'. lucida. 



30. /'. toxicod* ndron. 



.".1 . /'. pt rsicifolia. 



82. P. mbvestUa. 



33. /'. padifoiia. 



