58 
Yr. 
r. 
Yr. 
t. 
TREES OF 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; pith not in layers .......... 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 ; pith in layers in old wood........... 81. Juglans, 
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. 
Leaves once to twice irregularly odd-pinnate; the leaflets very 
irregularly and coarsely toothed; a small, round-headed tree 
with bladdery pods........ 6... see eee eeee 24. Kelreuteria. 
Leaves irregularly about twice odd-pinnate ; the leaflets lanceo- 
late; quite a low plant with few heavy-tipped branches; plant 
without prickles 0.00 1.6.0 cece cee eee eee eee tees 27. Rhus. 
. Leaves 2 (sometimes 3) times odd-pinnate; tree-stem with 
prickles; small tree or shrub, with few branches......... 
utah alee ue a haha Smee tera linana cle | fepslagrepa's heheh: Shy sl 44, Aralia. 
. 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; 
NGEAHOMMS . .ca2useiekiiw, segment quae 33. Gymnocladus. 
s. Leaves and leaflets much smaller, leaves quite irregularly 
once or twice abruptly pinnate; branches slender-tipped ; 
large tree, usually very thorny .............. 34. Gleditschia. 
s. 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.) 
Leaves abruptly pinnate, not over 5 in. long; leaflets 8-12, 
small, mucronate-pointed.............6. seaeeee 29. Caragana. 
. Leaves odd-pinnate; shrub or small tree, with few, heavy-tipped 
branches ; no spines or prickles... .... ............27. Rhus. 
. Leaves odd-pinnate ; leaflets large (3-5 in. long), not usually 
over 11 in number.............. 30. Cladrastis, or 81, Juglans. 
. Leaves odd-pinnate ; leaflets less than 3 in. long, frequently 
11-21 in number; often with spines at the bases of the leaves 
inthe place of stipules .. . 12. Xanthoxylum or 31. Robinia. 
u. Leaves palmately compound. (CC.) 
u. Leaves pinnately compound. (BB.) 
u. Leaves simple, evergreen, sessile, in whorls around the stem, 
which they completely cover.............. (984, Araucaria.) 
u. Leaves simple, opposite, evergreen, entire, over 2 in. long 
etd AS Os iaue sectecnenerncievavenners os es OL. Osmanthus. 
