
Fig. 218. Flowers of poinsettia (Euphorbia pulcherrima) 
Left, flower head — at the left of the head is a cup-shaped nectary, and pro- 
jecting from the head are three male flowers and one female flower; center, a 
single female flower composed of a stalk and pistil; right, a single male flower 
composed of a stalk and a single stamen. Compare with Fig. 80. (x 23) 

Fig. 219. Flower cluster of a Fic. 220. Showy flower head of a 
legume, rain tree (Hnterolobium legume, Leucaena glauca 
saman), showing brightly colored The conspicuousness of the head is due 
stamens. (X 3) to white stamens and pistils. (x 1) 

