68 



OLGASOGRAPHY. 



to them would be carried to the next Scrophularia visited 

 by them, and the pistil, if ripe, would receive and be fer- 

 tilized by them. 



75. As an example of proterandrous flower, may be 

 mentioned " Clerodendron ThompsonioB, a Verbenaceous, 

 tropical African climber, now common in conservatories. 

 The adaptations in this flower (which we indicated long 

 ago) are exquisite. The crimson corolla, and bright, white 

 calyx in combination, are very conspicuous. The long fili- 

 form filaments and style, upwardly enrolled in the bud, 



straighten and project when the corolla opens ; the stamens 

 remain straight, but the style proceeds to curve downwards 

 and backwards, as in Fig. 134. The anthers are now dis- 

 charging pollen ; the stigmas are immature and closed. 

 Fig. 135 represents the flower on the second day, the 

 anthers efiete and the filaments recurved and rolled up 

 spirally, while the style has taken the position of the fila- 

 ments, and the two stigmas, now separated and receptive, 

 are in the very position of the anthers the previous day. 

 The entrance, by which the proboscis of a butterfly may 



Fig. 134, 135. Proterandrous flowers of Chrodentiron Tkonipsonia : 134. Firet 

 stage ; Anthers mature ; 135. Second stage ; Stigma mature. 



