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’-18’ long, clinging through winter. Pennsylvania, west and 
south ; cultivated. (Pl. 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. Angelica-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 : I° 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. FLOWER: small, 
greenish, in side-clusters before leaves ; low tree (in cultivation) 
and shrub. (Pl. XII.) 
150. Prickly Ash. (Southern.) (Zanthoxylum carolinianum.) 
LEAF: I° or more, odd-pinnate, alternate; leaflets, 7-11, 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: 3-57, slender, soft, 5-clustered. CoNneE: 4’-6' (longest 
of all except of Norway spruce), often curved. (Pl. XIV.) 
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