Caprifoliaceae. 157 



minâtes in a floral part, which withers every year, and 

 the rejuvenescence takes place by a vigorous bud, situated 

 in the axis of one of the upper leaves, so that the fructi- 

 fication shoot, contrary to the two other forms of shoots, 

 becomes a sympodium. 



The floral part consists of a long thin internode, the 

 terminal bud of which does not reach development under 

 natural conditions. Below this point is a pair of bracts, 

 each supporting a flower, the inflorescence thus being a two- 

 flowered cyme. Just below each flower, three alternating pairs 

 of bracts are found ; the uppermost pair grows bigger as 

 the fruit ripens, finally quite enclosing it. The whole 

 of the floral part of the shoot is covered by glandular hairs, 

 which have a many-celled head, and a long, two- or three- 

 celled stalk. These hairs increase in numbers towards the 

 upper end of the shoot ; they are especially numerous on 

 the uppermost pair of bracts, which (according to Giger) 

 produces additional glandular hairs towards the time of 

 maturity; by means of their sticky secretion they are said 

 to fur+her the dispersal of the fruits by causing it to become 

 attached to passing animals. 



The Flower. A zygomorphy is often present both in calyx 

 and corolla ; it varies however mach, as does also the colour 

 of the corolla ; both of these peculiarities have been closely 

 studied by Wittrock (1907), to whose work reference is 

 made. The flowers have a pleasant, strong scent of 

 vanilla, and on the innerside of the corolla, at the base of the 

 lowermost petal, is a nectarium partly covered' by long hairs. 

 The secreted fluid shows distinct sugar reaction. 



The anthers are didynamous and develop simultaneously 

 with the stigma (according to Warming). The list of 

 the visiting insects (Giger) shows a comparatively great 

 number of Diptera, honeyseekers with short proboscis, which 



