Hop Hornbeam. Ironwood 293 



and advantageously used on light soils for a ground cover in woods, 

 standing shade well. 



O.fragrans Lour. (245) (Olea fragraiis), is a small tree, eight to ten 

 feet, from China, distinguished by its pretty, verj' fragrant, yellowish- 

 white flowers (June), but with less showy foliage; its hardiness ques- 

 tionable. It may be grown in pots. 



HOP HORNBEAM. IRONWOOD 



Ostrya. O. Virginica Willd. (245 bis), is a small, native tree, with thin, 

 birch-like foliage, turning a fine russet; similar to Carpinus, but of more 

 regular outline and branch habit and with more delicate foliage, the 

 young twigs reddish (birch-like), the old bark flaky. The pendulous 

 green, odd-shaped fruit adds to its ornamental value, which is similar 

 to the Hornbeam. Its use is similar to the preceding, the gray bark 

 adding to its winter efi'ect. 



O. vulgaris Willd. {car pinif olio) (246), the European species, has 

 no special superior points. 



SORREL TREE 



Oxydendron (Andromeda). O. arhoreum D C. (247). A beautiful and 

 characteristic small tree (fifteen to forty feet), of the Heath family (see 

 Shrub), native of the southern Alleghanies, with spreading crown, 

 shiny leaves, which turn early into glorious autumn colors; graceful 

 sprays of large, white, bell-shaped flowers appear in early summer; 

 this tree can be well grouped with Kalmia, Rhododendron, and other 

 evergreen shrubs of the kind, showing to especial advantage as the 

 center of the group. 



PAULO WNIA 



Paulownia. P. imperialis S. & Z. (248). This is a small to medium- 

 sized tree from Japan; of rather straggling, open form, very large and 

 tropical-looking, Catalpa-like leaves, and abundant, large, purplish 

 blue or violet, most fragrant flowers in stiff, terminal panicles of large 

 size (June); followed by nut-like fruit. Striking rather than orna- 

 mental, it can be kept in form only by severe pruning, which it stands 

 ver}' well, and then its luxuriant foliage is valuable. Cut back to the 

 ground every year, it can be readily kept in bush form, making shoots 



