218 
Well, then, the building plan of the trailing arbutus 
runs as follows : — 
I. Calyx. 
2. Corolla. 
3. Stamens. 
BaF a SPaSti, 
So far, it seems the same plan as that used by the 
cherry tree, yet in certain ways this plan really differs 
from that of the cherry blossom. The calyx 
of the cherry is not cut into separate leaves, 
as is that of the arbutus; and its corolla 
leaves are quite separate, while those of the 
arbutus are joined in a tube. 
The cherry blossom has more stamens than 
Fic. 212 the arbutus. Each flower has but one pistil. 
But the pistil of the arbutus, unlike that of the a 
is five-lobed. 
So, although the general plan used by these two 
flowers is the same, it differs in important details. 
Above you see the flower of the marsh marigold 
(Fig. 212). Its building plan is as follows : — 
1. Flower leaves. 
2. Stamens. 
3. Pistils. 
This, you remember, is something like the building 
plan of the easter lily. The lily has a circle of flower 
leaves in place of calyx and corolla. So has the marsh 
marigold. But the lily has six flower leaves, one more 
than the marsh marigold, and only six stamens, while 
the marsh marigold has so many stamens that it would 
tire one to count them. 
