GARDEN FLOWERS. 143 



DiCENTRA. 1^ [Fumariaceae.] Hardy herbaceous peren- 

 DiELYTRA. J nials, with showy flowers, formerly called 



" Fumaria." Rich garden soil. Increased by division. D. 



spedabilis, the most showy of all, is propagated readily by 



cuttings of the young shoots in spring, managed as dahlia 



cuttings, or by dividing its tuberous roots. 



D. bracteosa (bracted) ; hardy perennial ; i foot ; flowers 

 white, in June; North America; 1823. D. Canadensis (Can- 

 adian) ; hardy perennial ; i foot ; flowers white, in June ; North 

 America; 18 19. D. Cucullaria (hooded); hardy perennial; 9 

 inches; flowers whitish, in May; North America; 1731. D. 

 exi77iia (choice) ; hardy perennial ; i foot ; flowers red, in June ; 

 North America ; 1812. D.forjnosa (handsome); hardy peren- 

 nial ; I foot ; flowers red, in June ; North America ; 1796. D. 

 speciosa (showy) ; hardy perennial ; i foot ; flowers flesh-color, 

 in June ; 18 10. D. spectabilis (beautiful) ; hardy tuberous per- 

 ennial ; 2 feet ; flowers pink, in April ; north of China ; 1846. 

 D. teiiuifolia (slender-leaved) ; hardy perennial ; i foot ; flowers 

 pink, in June; Kamtschatka ; 1820. 



There is a white variety of D. spectabilis. 



DiERViLLA. [Caprifoliacese.] A hardy native shrub, 

 growing freely anywhere, and increasing rapidly by suckers. 



D. hitea (yellow) ; hardy shrub ; 3 feet ; flowers yellow, in 

 June; North America ; 1739. See also Weigela. 



Digitalis. Foxglove. [Scrophulariaceae.] Hardy peren- 

 nials, with a few biennial species, mostly showy or pretty 

 plants for the borders. The common Foxglove ( D. pur- 

 piwea) is much esteemed as a garden flower, and is a very 

 handsome plant. They are all increased readily by seeds. 

 Sow in August if the seeds are ripe ; if not, in April, on 

 moderately good ground, and rather thinly ; thin the plants 

 to six inches apart ; those taken up, if required, may be 

 planted elsewhere six inches apart ; but those not removed 

 will be the strongest. The autumn-sown ones may be re- 



