CAMPANALS, 489 
principle is generally combined with a volatile oil or resin, whilst 
the roots contain a matter more or less analogous to fecula, some- 
what resembling starch, known under the name of inuline. Accord- 
ing to the proportion of these different principles, some of the 
species are tonic, others stimulant, others astringent. We may 
thus mention W orm- 
wood (Artemisia ab- 
sinthium),fromwhich 
the well-known be- 
verage is obtained ; 
Tansy (Tanacetum 
vulgare); Yarrow, 
Milfoil, or Thousand 
Leaves (Achillea mil: 
lefolium) ; Ptarmi- 
cas, of which several 
Alpine species are 
used by the Swiss as 
tea; the different 
mile. (Anthemis no- 
bilis), of which we 
give a representa- 
tion in Fig. 440, an 
example in which 
the head has become 
 Semi-flosculous by 
culture ; the Moun- 
tain Apes and 
Elecampane (Inula 
helenium), &e. 
It is to the large 
division of the Tubu- Fig. 440.—Roman Camomile, — 
lifloral Radiates that : 
most of the Composites cultivated as ornamental belong. Such are 
the Chrysanthemums, of which so many beautiful varieties are now’ 
Cultivated i in our town gardens, for which — enpecially adapted ; 
