2/8 GARDEN FLOWERS. 



OSTRYA. Hop Hornbeam. [Corylaceae.] Hardy decidu- 

 ous small trees, with fine foliage and ornamental fruit. In- 

 creased by seeds, and grafting on common Hornbeam. Rich 

 deep moist soil. 



O. Virginica (Virginian) ; 20 feet ; flowers in May ; North 

 America; 1622. O. vulgaris (common); 20 feet; flowers in 

 May; Italy; 1724. 



OSWEGO TEA. Monarda didyma. 



OXYTROPIS. [Leguminosse.] A family of mostly hardy 

 plants from Siberia, allied to Astragalus. Soil, sandy loam. 

 Propagated by seeds sown where the plants are to remain, 

 as they transplant badly. There are some forty species. 



OXYURA. [Compositae.] A pretty showy chrysanthemum- 

 like annual. Sow in the open border in May, and thin out 

 the plants. 



O. chrysanthemoides (chrysanthemum-like) ; hardy annual ; 1 8 

 inches ; flowers yellow and white, in July ; California ; 1834. 



