134 GARDEN FLOWERS. 



must be tied up as they grow, or the wind will break them 

 down. Seeds may be sown in April in a hot-bed, and the 

 young plants potted and kept growing till the middle of May ; 

 they may then be planted in rows, two feet apart in the row, 

 and three from row to row. The florists' varieties have been 

 obtained by years of crossing and seed-saving, from D. 

 variabilis, and are now almost endless in variety of colour, 

 and vary in height from three to six feet. The other kinds 

 of Dahlias are small tuberous-rooted perennials, requiring to 

 be protected in winter, and planted out in summer in good 

 garden soil. 



D. Barkerice (Miss Barker's) ; half-hardy tuber ; 2 feet ; flow- 

 ers blush, in August ; Mexico; 1838. D. frustranea (barren- 

 rayed) ; half-hardy tuber ; 6 feet ; flowers scarlet or orange, in 

 September; Mexico; 1802. D. glabrata (smooth); half-hardy 

 tuber ; 3 feet ; flowers lilac, in July ; Mexico ; 1838. D. scapigera 

 (scape-bearing) ; half-hardy tuber ; 2 feet ; flowers lilac, in July ; 

 Mexico; 1837. D. variabilis (variable); half-hardy perennial; 

 3 to 6 feet ; flowers various, in September ; Mexico ; 1789. 



The florists' varieties are very numerous, and a selection 

 can be readily made from any florist's catalogue. The 

 pompon varieties are rather pretty if well pegged down in 

 abed. 



DAFFODIL. See NARCISSUS. 



DAISY. See BELLIS. 



DALIBARDA. [Rosaceae.] A pretty, low-growing family 

 of plants, suitable for rock-work. Increased by seed and 

 division. 



D. repens (creeping) ; hardy perennial ; 6 inches ; flowers 

 white, all summer. North America. 



DAPHNE. [Thymelaeas.] A genus of well-known plants, 

 of which only two, D. cneorum and mezereon, are hardy in the 

 Northern States. They thrive in any good garden soil, and 



