200 HARDY PERENNIALS 
Thymes may be propagated by layering, and cut- 
tings will also strike in a bed of fine, sandy soil. 
Tiarella. — Appropriately called the ' Foam 
Flower,' Tiarella cordifolia and its white and rosy 
coloured varieties may be likened to the Heucheras, 
the heart-shaped leaves even more than the flower 
spikes bearing the resemblance. 
The foliage assumes ruddy and metallic tints in 
Autumn, whilst the extreme lightness of the flowers, 
fluttering with every movement in the air, gives 
reason for the name of Foam flower. The plant 
throws out little rooting side-growths, by separation 
of which stock may be increased. 
Tolmiea Menziesii. — Akin to both Tiarella and 
Tellima in appearance, this plant throws spikes or 
panicles of flowers to a height of about eighteen 
inches. The colour is of greenish hue, not gaudy, 
but quietly interesting, and very useful for toning 
down more aggressive flowers in table decorations. 
A cool, moist and shady spot suits Tolmiea, which 
may be propagated in the same manner as Tiarella. 
Tradescantia virginica. — There is a modest and 
quaint appearance about the clusters of three- 
petalled flowers of Tradescantia virginica as they 
nestle bashfully at the base of the narrow, gracefully 
arching leaves that appeals strongly to many flower 
lovers, whilst to some the plant seems to be quite 
uninteresting. True, there are very many showy 
plants that outshine the little Spider- wort, but 
listen or take heed to its good qualities and consider 
