DESCRIPTIVE AND SELECTIVE. 267 



leaves, is more popular even than the type. It forms 

 dense cushions of grey downy leaves in almost any soil 

 and in hot sunny places. While not exactly a rampant 

 plant it spreads fast enough to endanger fragile plants, 

 and should be kept under restriction. Variegatus, 

 which has variegated leaves, is also a useful variety. 

 The Thymes may be propagated by division or cuttings 

 in spring. 



TIARELLA (Foam Flower). — Tiarella cor di folia 

 is a graceful plant, with dense, dwarf green foliage 

 that becomes bronzy, and tall stems of pink buds and 

 creamy bloom in April. It is not particular as to 

 soil, but enjoys some peat in the compost. It may 

 be propagated by division in autumn. 



TRIFOLIUM ALPINUM (Alpine Clover).— A 

 genus which includes the clovers is of great importance 

 to agriculturists, but it is not necessarily valuable in 

 the garden. Most of the Trefoils are useless to the 

 fiower-lover, but the Alpine Clover is, as one of the 

 coloured plates shows, a pretty plant in Nature. It 

 grows about six inches high, and bears its pink flowers 

 in June in the garden. Ordinary soil will suit. The 

 species may be raised from seed sown in spring, and 

 divided when established if desired. 



TRILLIUM.— The best plant of this genus is 

 grandifloruMj the Wood Lily, a beautiful American 

 plant, which produces its large pure white flowers on 

 stems about a foot high in May. When planted in 

 peat in a moist, shady place, in sufficient quantities to 

 form a colony, it makes a beautiful picture. One may 

 see it thus in the gardens of the Royal Horticultural 



