TREE SPECIES. 37 



feet in height and 30 inches in diameter. It is frequent below an elevation of 

 4,000 feet on rather dry, yet shaded and deep soil. It seeds abundantly and 

 reproduces freely by sprouts, suckers, and seed. The hard yellow wood is very 

 durable in contact with the soil, or on exposure, and is extensively used for 

 fence posts, sills, bridge timber, and insulator and ship pins. It is a most 

 valuable tree, but is often attacked by a fungus which destroys the heartwood. 



Clammy locust {Bohinia viscosa). The clammy locust is a small tree, 20 to 

 30 feet in height, with a short stem, or generally a large shrub found wild onl}- in 

 the southeastern part of this area. It is highly prized as an ornamental plant on 

 account of the beauty of its flowers, and is extensively cultivated. Its wood has 

 no uses. It seeds frequently and reproduces freely, both by seed and suckers. 



PricMy ash {Xanthoxylum dava-herculis). The prickly ash becomes 25 feet 

 in height and 12 inches in diameter, and is frequent along streams. The wood 

 is not used. An extract from the bark is used medicinally. It seeds abundantly 

 and reproduces freel5\ 



Ailanthus {Aila?ithus glandidosus). The ailanthus is an Asiatic tree which 

 reaches a height of 40 feet and a diameter of 10 inches. It grows extensively 

 along some of the streams, where it propagates freely by means of suckers, and 

 forms dense thickets. The wood is hard, durable, and valuable, but is not used. 

 The growth is rapid. 



Staghorn sumach {Rhus hirta). The staghorn sumach is seldom 30 feet in 

 height, growing along streams or in waste places, especially at high elevations. 

 The bark yields a superior tannin for kids, but is not used locally. 



Holly {Ilex opaca). The holly is a small evergreen tree, rarely more than 50 

 feet in height and 12 inches in diameter, and grows chiefly on sandy flats along 

 streams l>elow an elevation of 2,000 feet. The wood is hard, white, and fine 

 grained, and is used to some extent in cabinetmaking. It seeds often and abun- 

 dantly, and reproduces well. It is much prized as an ornamental tree. 



Dtcickious holly {Ilex decidua). The deciduous holly is seldom 25 feet in 

 height, with a short trunk and large, spreading crown, growing along streams 

 below an elevation of 1,500 feet. The wood is hard and tough, but is not used. 



Mountain holly {Ilex monticola). The mountain holly becomes 25 feet in 

 height and 10 inches in diameter, and is common on cold slopes at high 

 elevations. The wood is not used. 



Mountain maple {Acer sjncatwn). The mountain maple is a small tree, seldom 

 20 feet in height, often with several stems from the same root, which grows in 

 cold, wet soil at high altitudes. It has no uses. 



Striped maple {Acer pennsylvanicum). The striped maple becomes 50 feet in 



