58 TREES OP THE NORTHERN UNITED STATES 



q. Coat of fruit more or less dehiscent into 4 valves; nut 

 smoothish ; leaflets, except in one species, not over 11 in 



number, usually 5-7 82. Carya. 



q. Coat of fruit not regularly dehiscent ; nut, in the wild species, 

 rough-coated ; leaflets, except in a cultivated species, over 11 



in number 81. Juglans. 



r. Leaves quite regularly twice odd-pinnate ; leaflets about 1 in. 

 long; juice not milky; fruit rounded berries in large clusters; 



plant not prickly ; branchlets not heavy-tipped 15. Melia. 



r. Leaves once to twice irregularly odd-pinnate ; the leaflets very 

 irregularly and coarsely toothed ; a small, round-headed tree 



with bladdery pods 24. Kcelreuteria. 



r. Leaves irregularly about twice odd-pinnate ; the leaflets lanceo- 

 late ; quite a low plant with few heavy-tipped branches ; plant 



without prickles 27. Ehiis. 



r. Leaves 2 (sometimes 3) times odd-pinnate ; tree-stem with 



prickles; small tree or shrub, with few branches 



44. Aralia. 



r. Leaves once to twice abruptly pinnate ; large tree with slender- 

 tipped branches, usually very thorny 34. Gleditschia. 



s. Leaves very large (2 ft. or more long), about twice abruptly 

 pinnate ; leaflets broad and often 2 in. long ; branches blunt ; 



no thorns 33. Gymnocladus. 



8. Leaves and leaflets much smaller, leaves quite irregularly 

 once or twice abruptly pinnate ; branches slender-tipped ; 



large tree, usually very thorny 34. Gleditschia. 



6. Leaves twice abruptly pinnate; leaflets over 400 in number, 



with midrib near the upper edge 35. Albizzia. 



s. Leaves regularly once pinnate, not over 2 ft. long, (t.) 

 t. Leaves abruptly pinnate, not over 5 in. long; leaflets 8-12, 



small, mucronate-pointed 29. Caragana. 



t. Leaves odd-pinnate ; shrub or small tree, with few, heavy-tipped 



branches ; no spines or prickles 27. Ehus. 



t. Leaves odd-pinnate; leaflets large (3-5 in. long), not usually 



over 11 in number 30. Cladrasfis, or 81. Juglans 



t. Leaves odd-pinnate ; leaflets less than 3 in. long, frequently 

 11-21 in number ; often with spines at the bases of the leaves 



in the place of stipules 12. Xanthoxylum or 31. Eobinia. 



u. Leaves palmately compound. (CO.) 

 u. Leaves pinnately compound. (BB.) 

 u. Leaves simple, evergreen, sessile, in whorls around the stem, 



which they completely cover (98. Araucaria.) 



u. Leaves simple, opposite, evergreen, entire, over 2 in. long 

 61. Osmanthtis. 



