182 PRACTICAL FORESTRY. 



tree, said to be found in Pennsylvania and southward, but I am 

 inclined to think not very common, as I have failed to find it 

 in cultivation, or obtain specimens from my correspondents 

 who reside in the regions where it is said to be indigenous. 



P. arbutifolia, Linn. Choke Berry. Leaves oblong or obovate, 

 finely serrate. Flowers white or tinged with purple. Fruit 

 pear-shaped or round, red, sometimes purple. There are several 

 wild varieties, one with black fruit. This is the Aronia arbutl- 

 folia of Ell. A small tree or large shrub, sometimes ten or 

 twelve feet high. In swamps South. 



P. comuaiia Linn. American Crab Apple. Leaves simple on 

 long, slender petioles, ovate or roundish, very smooth, and two 

 to three inches long. Flowers few in a cluster, rose-color, and 

 very fragrant. Fruit an inch or more in diameter, rather 

 broad and flat. Very acid and astringent ; usually of yellowish- 

 green color. A small tree, but in rich alluvial soils sometimes 

 twenty-five feet high. Wood light-colored, but hard and fine- 

 grained. A handsome ornamental tree. Central New York, 

 west to Wisconsin, south along the mountains, and in the Mis- 

 sissippi Valley. 



P. rivnlaris, Dougl. Oregon Crab Apple. Leaves simple ovate- 

 lanceolate, acute or acuminate, one to three inches long, some- 

 times three-lobed, more or less woolly-pubescent, as well as the 

 young branches. Flowers small, white. Fruit red or yellow, 

 about a half inch long. A small tree twenty to twenty-five 

 feet high. In low grounds in California and northward to 

 Alaska. 



P. sa mhnci folia, Cham. & Schlect. Western Mountain Ash. 

 Leaves pinnate, and leaflets in four to six pairs, oblong-acute, 

 sharply serrate. Flowers white, like those of the Eastern 

 Mountain Ash. Fruit red, round, and about a quarter of an 

 inch in diameter. A small shrub. In the Sierra Nevada, and 

 north to Sitka. 



PISCIDIA, Linn. Jamaica Dogwood. 



A small genus of tropical trees with unequal pinnate leaves, 

 and pea-shaped flowers in terminal or axillary spikes. Fruit a 

 bean-like pod, contracted between the seeds. We have one spe- 

 cies. 



Piscidia Erythrina, L. Jamaica Dogwood. Leaflets seven to 

 nine, oblong-ovate, abruptly pointed. Young branches, leaves 

 and flower-stalks silky and whitish, but becoming smooth with 



