194 SOUTH AFRICAN FLOWERING PLANTS. 



anterior side of the corolla, an almost invariable rule 

 with irreo'ular flowers, such as this is. 



The section cuts the two cells of the ovary from 

 back to front, showing the invariable position of the 

 cells, one being posterior and the other anterior. 



The front petal is prolonged into a spur into which 

 the honey passes, being secreted by a disc at the base 

 of the ovary. This is one of the flowers from which 

 bees often extract the honey by " burglary," for instead 

 of entering it in the legitimate way by the mouth, they 

 bore a hole through the corolla at the base, and so 

 get it with less trouble : luit of course no pollination 

 is effected by them. Smaller bees, etc., which are not 

 strong enough to cut a hole, take advantage of the 

 stronger sorts, and so get the honey through the hole 

 which their predecessors have made. 



The corolla of the Snapdragon only differs from that 

 of Lina'ria in having a " pouch " instead of a " spur ; " 

 but the way the capsules burst is different. In the 

 former the posterior cell has one pore and the anterior 

 tioo ; but there is one to each in the Lina'ria. 



Neme'sia. — This has a five-parted calyx, a personate 

 corolla, which may be yellow, white, violet, or parti- 

 coloured, the upper lip being four-cleft, and the 

 throat prolonged into a pouch or spur. The two 

 longer stamens curve round at the base and clasp the 

 upper ones. The anthers are one-celled, somewhat 

 cohering in pairs. When the capsule bursts, the two 



