33 



the throat is relatively wide, about 1-5 mm. across. The inte- 

 rior of the corolla is glabrous (Fig. 22 C, H). 



Although the stigma is situated in the throat (Fig. 22 H) 

 or sometimes even beyond it, the anthers reach only to the 

 middle of the corolla or somewhat higher, yet the pores by 

 means of which they open are not far from the stigma beneath 

 them. The stamens have no bristles nor appendages, but the 

 anthers and filaments are rough with small protuberances 

 (Fig. 22 D, E). 



Fig. 22. Cassandra calyculata. 

 A, Even in such a bud the pollen has fallen in quantities out of the anthers and is seen 

 to lie upon the glabrous sides of the corolla (about Vi). B, Pollen tetrad. C, Longitudinal 

 section through a young flower. D, E, Stamen and upper part of anther of С F, pollen 

 tetrads upon the stigma of a bud. G, Flower: H, the same in longitudinal section. (E. W.) 



Self-pollination appears to be able to take place easily. 

 The plant is doubtless homogamous; even in the bud quantities 

 of pollen-grains (Fig. 22 i?) fall out of the anthers and are seen 

 to he upon the inside of the corolla as also upon the stigma 

 (Fig. 22 ^, i^). 



At the base of the ovary there is a honey-secreting disk, 

 dark-green in colour and ten-lobed (Fig. 22 C]. 



In the Botanic Garden in Copenhagen it flowers early, 

 even in the month of iMarch. ..„-— — -^^ 



XXXVI. 3 y^^ÇÇ^C^/" 



