44 



A FIELD GUIDE IN NATURE-STUDY 



gg Leaflets 7-11; nut thin-shelled 



Bitternut or Swamp Hickory 

 ee Leaflets lance-shaped 



/ Yellow bark with conspicuous hori- 

 zontal streaks, the lenticels Mountain Ash 

 ff Bark not yellow nor streaked hori- 

 zontally 



g Leaflets 2 in. or more long; pith 

 chambered between nodes 

 h Leaf stems and branchlets 



downy, bark gray White Walnut 



hh Leaf stems downy, bark dark Black Walnut 



gg Leaflets i in. or less long 



h A pair of spines at each node 



i Leaflets not over 9 Prickly Ash (shrub) 



ii Leaflets more than 9; tree 



bears pods 5 in. long Common or Black Locust 

 hh No spines at nodes but thorns 

 on trunk; tree bears pods 

 10 in. or more long Honey Locust 



bb Leaves simple 



c Trees with thorns on branches 



d A short thorn at each node Osage Orange 



dd Long thorns scattered on branches 



e Thorns real thorns Hawthorn 



ee "Thorns" simply stubby sharp fruit 



spurs Wild Crab 



cc Tree thornless 



d Bark smooth with conspicuous horizontal 

 lenticels 



e Bark white, peeling in papery layers White Birch 



ee Bark reddish to brown (on trunk it may 

 be roughened) 



/Fruit conelike Tag Alder 



//"Fruit not conelike 



g Terminal bud absent Wild Plum 



gg Terminal bud present 



h Blossoms and fruits in raceme- 

 like clusters Choke Cherry 

 hh Blossoms and fruits single Pin Cherry 

 Bark without conspicuous horizontal lenti- 

 cels 

 e Bark flaking, leaving stem patched in 



green and white Sycamore 



