GARDEN FLOWERS. 83 



tive orchid, growing in rich sandy peat, in a moist cool 

 exposure. 



C. borealis (northern) ; hardy perennial ; 6 inches ; flowers 

 rose and brown, in May ; North America ; 1820. 



Calystegia. [Convolvulacese.] Convolvulus-like twin- 

 ing or trailing perennial plants, hardy or mostly so. Their 

 culture is extremely simple ; a fragment of the perennial 

 root merely requires to be placed in the ground, and it will 

 soon establish itself, and, if not checked, spread, and be- 

 come a troublesome weed. Sandy loam is most congenial 

 to them. C. Soldanella should be occasionally watered with 

 salt water. 



C. Catesbiana (Catesby's) ; flowers rose, in July ; Carolina ; 

 1816. C. DaJmrica (Dahurian) ; hardy climbing perennial; 

 18 inches ; flowers pink, in July ; Dahuria ; 1823. C. pubescens 

 (pubescent) ; hardy climbing perennial ; 6 feet ; flowers pink, 

 double and single, in July; China; 1844. C. sepium (great 

 hedge) ; hardy climbing perennial ; 6 feet ; flowers white or rose- 

 color, in June ; England. C. Soldanella (Soldanella) ; hardy 

 traihng perennial ; i foot ; flowers flesh-color, in June ; England. 

 C. spithavicEa ; hardy climbing perennial ; i foot ; flowers white, 

 in July; North America; 1796. C. sylvestris (wood); flowers 

 white, in July Hungary ; 1815. C. tomentosa (woolly); flowers 

 pinkish-white, in June ; North America ; 1818. 



Campanula. [Campanulacese.] Very handsome plants, 

 comprising annuals, biennials, and perennials, mostly hardy, 

 with a few greenhouse species. The annuals should be 

 sown in the open border in May, the seed being slightly 

 covered on account of its small size. The perennial hardy 

 kinds are increased by seeds or division, and require no 

 peculiar treatment. The biennials are sown in May and 

 June for blooming the following year. Good garden soil 

 suits them all, but it should be rather rich for the Canter- 

 bury-bell. The Chimney Campanula is undoubtedly one 



