GARDEN FLOWERS. 339 



They are of the easiest culture, growing in almost any soil 

 not retentive of moisture, but preferring that which is sandy. 

 When established on rock-work, they grow almost without 

 soil. A very handsome half-hardy kind, somewhat shrubby- 

 habited, is 6". Sieboldii y one of the prettiest of the species, 

 having very glaucous leaves, and large heads of pink flow- 

 ers ; it forms a large tuft when grown in a large pot, and 

 should have a light open soil. Increased by division. 



S. acre (acrid) ; hardy perennial ; 3 inches ; flowers yellow, in 

 June; England. .S". dasyphyllum (thick-leaved) ; hardy peren- 

 nial ; 3 inches ; flowers white, in June ; England. S. Kamt- 

 schaticum (Kamtschatkan) ; hardy perennial ; 6 inches ; flowers 

 yellow, in June ; Kamtschatka. 6". rupestre (rock) ; hardy per- 

 ennial ; 3 inches ; flowers yellow, in June ; England. 6". Sie- 

 boldii (Siebold's) ; half-hardy perennial ; I foot ; flowers pink, in 

 August ; Japan ; 1835. S. Telephium (Orpine) ; hardy perennial; 

 2 feet ; flowers purple, in July ; England. S. villosum (shaggy) ; 

 hardy perennial ; 3 inches ; flowers pink, in June ; England. 



All the species of Sedum, and they are numerous, are de- 

 sirable plants for rock-work. 



SEMPERVIVUM. House-leek. [Crassulaceae.] A family of 

 succulents, related to Sedum, comprising many shrubby 

 greenhouse species and a few hardy perennials. The hardy 

 herbaceous kinds flourish in rather dry garden soil, and are 

 increased by division. The best species are S. arachnoideum, 

 flagelliforme, globiferum, pumilum, and tectorum. 



SENECILLUS. [Composite.] Hardy herbaceous peren- 

 nials, allied to Cineraria. Easily increased by seeds or 

 division. Rich sandy loam. 



S. glauca (sea-green) ; hardy perennial ; 6 feet ; flowers yel- 

 low, in August ; Siberia; 1790. 



S. purpurata, from Cape of Good Hope, with purple flow- 

 ers, is not hardy in the Northern States. 



