FLOWERS. 
Flowers are in general reproductive organs of plants. 
Review the work done on buds. What kind of buds did 
you find with regard to contents? Considering origin, 
is there any relation between a flower and a shoot (a 
stem with its leaves)? 
Select for study some typical flowers, e. g., Trillium, 
tulip, or butter-cup. 
Exp. 37: Cut a Trillium, or any other light colored 
flower so that its stem, peduncle, will be about 5 cm. long, 
place the cut end into a weak solution of eosin, . After 
24 hours study the petals and sepals. Results; conclu- 
sions? Draw a petal and a sepal (x1), showing the 
principal veins. 
Note that a flower has three sets of organs: (1) The 
outer set, composed of more or less leaf-like structures, 
is called the perianth: (2) the uppermost set is com- 
posed of several parts, pistils, more or less closely united. 
It is called the gynoecium: (3) The set between the 
perianth and the gynoecium, composed of several slen- 
der projections (stamens), this is called the androecium. 
Perianth.—The perianth may be composed of one or 
more than one whorl. If there is more than one whorl 
and the whorls differ, the outer is called the calyx and 
the rest the corolla. The divisions of the calyx are 
called sepals. and those of the carolla petals. Does the 
flower studied have a calyx; a corolla? How many divi- 
sions in each? What is the relation in position between 
