142 GARDEN FLOWERS. 



Greece; 1815. D. Hendersonianus (Henderson's); hardy per- 

 ennial ; I foot ; flowers crimson, in July ; gardens. D. phima- 

 rius (garden pink) ; hardy perennial ; 9 inches ; flowers white 

 and purple, in June ; England . D. siiffriiticosiis (half-shrubby) ; 

 half-hardy evergreen sub-shrub; 18 inches; flowers pink, in 

 August; Siberia; 1804. 



There are about one hundred hardy perennial kinds, 

 varying in height from 6 to 18 inches, and with flowers 

 usually white, pink, or flesh-colored. All of these are more 

 or less ornamental. D. deltoides is a fine plant for rock- 

 work : D. cruentus has brilliant red flowers ; D. Verscha- 

 feldtii and Veitchii are very showy species if carefully grown. 



DiAPENSiA. [Polemoneaceae.] A dwarf Alpine ever- 

 green, of diflicult culture. 



D. Lapponica (Lapland) ; hardy shrub ; 4 inches ; flowers 

 white, in July ; Lapland ; North America ; 1801. 



DiCTAMNUS. Fraxinella. [Rutaceae.] Showy hardy per- 

 ennials, with leaves something like those of an ash-tree ; 

 hence the ndcmo. fraxijiella, or little Fraxinus, the latter being 

 the name of the Ash. They grow in common garden soil, 

 preferring loam. Propagated slowly by dividing the roots ; 

 or more readily by seeds, which should be sowji as soon as 

 ripe, in open beds. 



D. albus (white) ; hardy perennial ; 3 feet ; flowers white, 

 in June; Germany; 1596. D. angustifolius (narrow-leaved); 

 hardy perennial; 3 feet; flowers lilac, in June; Altai; 1821. 

 D. fraxinella (fraxinella) ; hardy perennial ; 3 feet ; flowers 

 purple, in June ; Germany ; 1596. 



DiDiscus. [Umbelliferae.] A very pretty half-hardy an- 

 nual. Sow in April in a hot-bed, and plant out in the 

 border in May. Rich light soil. Propagated by seed. 



D. coeruleus (sky-blue) ; half-hardy annual ; 2 feet ; flowers 

 pale-blue, in July ; New South Wales ; 1827. 



