244 



ZiESSONS WITS PLANTS 



scapes, 

 or 



and if the plant had been examined two 

 three weeks earlier the flowers from which these 

 seeds came would have been 

 seen to be apetalous and closed 

 up tight in the calyx. They 

 must, therefore, be self- fer- 

 tilized. That is, some kinds 

 of plants bear two kinds of 

 flowers,— the normal, showy 

 kind, fitted to attract 

 insects, and the closed, 

 inconspicuous kind, 

 which are self-fertUe. 



280a. These reduced 

 and simplified flowers 

 are said to be eleis- 

 togamous. The pupil 

 will find similar ones 

 in the common blue 

 violet after the showy 

 flowers have passed, 

 in the fringed polyg- 

 ala, and in a com- 

 mon bean-like vine 

 of woods, known as 

 amphicarpeea. 



Pig. 232. 

 Normal and cleistogamous flowers of dalibarda. 



281. The most conspicuous thing about these 

 cleistogamous flowers is their simplicity, — the short 

 peduncles or scapes, the absence of petals, the 

 dwarfed and closed calyx, and the small amount 



