182 PEACTICA.L FOEBSTET. 



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. arlintifolia, 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 arhuti- 

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

 twelve feet high. In swamps South. 



P. conorariaj 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-flve 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. riTnlails, 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. sambndfoUa, 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 Dogtoood. 



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. 



Plscidia 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 



