GARDEN FLOWERS. 345 



extensively used for lawns ; but in this country our summer's 

 sun dries them up. Stiff loamy soil. Propagated by division 

 and seed. 



S. pilifera (hairy) ; hardy perennial ; 2 inches ; flowers white, 

 in June ; Corsica. 



SPIDERWORT. See TRADESCANTIA. 



SPIGELIA. Worm-grass. [Gentianeae.] S. Marilandica 

 is a pretty hardy perennial herb, growing a foot high, and 

 bearing tubular flowers, which are scarlet, tipped with green, 

 and baar no inconsiderable resemblance to those of Cor- 

 rea spetiosa. The plant prefers a cool and somewhat shady 

 situation, where the soil is of a somewhat peaty character, 

 say half peat and half maiden loam. When in a thriving 

 condition, it is a very pretty plant. It is propagated by divi- 

 sion of the root. 



S. Marilandica (Maryland) ; hardy perennial ; i foot ; flowers 

 red and green, in July ; North America ; 1694. 



SPINDLE-TREE. See EUONYMUS. 



SPIRAEA. [Rosaceae.] A very interesting tribe of hardy 

 plants, some of them herbaceous perennials, others decidu- 

 ous shrubs, handsome when in flower : nearly all bear white 

 flowers in pyramidal spikes. The herbaceous kinds are 

 beautiful in pots or in the borders ; and the shrubs are pretty 

 in plantations. The former are propagated by parting the 

 plants and by cuttings ; and the latter by layers, and by 

 cuttings of the young wood. The herbaceous kinds spread 

 a good deal, and may be divided easily. The shrubs are 

 very useful in clumps, and can be pruned to any form. To 

 propagate these, the branches should be layered in autumn. 

 There are many species, of which those enumerated below 

 are some of the best and most distinct. 



S. ariafolia (white-beam-leaved) ; hardy shrub ; 6 feet ; flow- 

 ers whitish, in July; North America ; 1827. S. aruncus (goat's- 



