364 



THE HIGHER DICOTYLEDONS. 



those of Borage, while those of some foreign genera (e.g. 

 Schizanthus) have practically a " Papilionaceous " mechanism, 

 in some cases exploding (as in G-orse, etc.) when a bee alights 

 on the lower corolla lip. 



366. Honeysuckle or Woodbine (Lonicera periclymenwri), 

 though exceptional among its relatives in being a climber, is 



STYLE 



COROLLA 

 NECTAR, 



STIGMA 



CALYX 

 OVARY (INFERIOR) 



Fig. 150. Longitudinal Section of Flower of Honeysuckle. 



the most familiar representative of its family in Britain. Its 

 stems twine round those of other plants in hedgerows and 

 woods ; its leaves are in pairs, and are ovate with entire or 

 sometimes slightly lobed margin and a downy under side. 

 The leaf -buds open early in spring ; 

 the flowers appear in May and are 

 usually at the ends of the branches, 

 in rounded clusters. The cluster re- 

 sembles a Composite flower-head, 

 but is cymose, the central flowers 

 being the first to open. Below the 

 cluster there are some small bracts. 



The flower (Figs. 150, 151) has a 

 small rounded inferior ovary (three- 

 chambered, with several ovules in 

 each), crowned by the short calyx, 

 which has five small teeth. The 

 corolla, about 4 cms. long, has a 

 narrow tube, and its mouth is two- 

 lipped, the lower lip (consisting of the lowest petal) being 

 strap-shaped and the upper broad and four-lobed; it is 

 reddish and covered with hairs outside, but yellow within. 



Fig. 151. Floral Diagram of 

 Honeysuckle. 



