chap. XT.] CALCEOLARIAS.—MYRTLES. 367 
produced^ are C. corymbosa, and C. arach¬ 
noid ea, the one a yellow, and the other a 
purple flower; but there are many other 
species that have been crossed and re-crossed 
with these; so as to form a very great variety. 
C. bicolor has a very large pale yellow-and- 
white flower; and it has been the parent of 
some very fine hybrids and varieties. All 
the calceolarias require rather a rich soil; 
and the usual compost is two parts of tho¬ 
roughly rotten dung, one part of leaf mould, 
or old turf, and one part of wdiite sand. The 
ingredients of this compost should be well 
mixed together, and broken fine, but not 
sifted. All the Calceolarias require plenty 
of water, and abundance of light and air; 
and they will all flower best when planted in 
the open ground. They are, however, very 
subject to be attacked by a kind of aphis; 
and when kept in pots, they should be fre¬ 
quently syringed. 
Myrtles should be grown in a soil composed 
of peat and loam, in which the former pre¬ 
dominates; they should be regularly watered, 
and frequently syringed. Some persons nip 
off the tips of the young shoots, to make 
