Description of Native Trees 



long-oval, apex rounded ; thorns large, often branched and clus- 

 tered on trunk and branches ; bark dark, smooth. Flower : 

 small, greenish, in small dense clusters ; June. Fruit : a pod, 

 8'-i8' long, clinging through winter. Pennsylvania, west and 

 south ; cultivated. (PI. XI.) 



147. Water-locust. (Gleditschia monosperma.) 



Leaf : as in 146, but leaflet ovate or oblong, thorns more slen- 

 der, pod oval, with one seed. Illinois ; low tree. 



148. Angrelica-tree. Hercules' Club. Devil's Walking- 

 stick. (Aralia spinosa.) 



Leaf : 2°-3°, twice pinnate, alternate, crowded ; leaflets, 2-3' 

 long, ovate, serrate, apex pointed ; trunk club-shaped, little- 

 branched, beset with stout spines. Flower : small, whitish, in 

 very long, erect, compound clusters ; July, August. Pennsylva- 

 nia to Kentucky ; low tree and shrub ; cultivated. (PI. XIII.) 



149. Prickly Ash. Toothache Tree. (Zanthoxylum ameri- 



canum.) 



Leaf : 1° or more, odd-pinnate, alternate ; leaflets, 5-11, 2'-3' 

 long, almost or quite entire, long-oval, base and apex pointed, 

 downy when young, stemless, with lemon odor when crushed ; 

 branches and sometimes leaf-stalk prickly. Floviter : small, 

 greenish, in side-clusters before leaves ; low tree (in cultivation) 

 and shrub. (PI. XII.) 



150. Prickly Ash. (Southern.) (Zanthoxylum carolinianum.) 



Leaf : 1° or more, odd-pinnate, alternate ; leaflets, 7-1 1, 2-3', 

 ovate or lance-ovate, base oblique, glossy. Flower : small, 

 greenish-white, in terminal clusters, after the leaves ; June. 

 Coast of Virginia ; low prickly tree and shrub. 



151. White Pine. Weymouth Pine. (Pinus strobus.) 



Leaf : 3-5', slender, soft, s-clustered. Cone : 4'-6' (longest 

 of all except of Norway spruce), often curved. (PI. XIV.) 

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