1I§ 



morpmologv 



sp. 



ousness is increased in many cases by the inflorescence 

 developing flowers on one side only, as in Foxglove 

 {Digitalis Sp.); or by colour-contrast, as in Pansy 

 {Viola tricolor); or by flowers assuming a more intense 

 hue after pollination, and there-' 

 by rendering the plant more 

 conspicuous, as in sthal-padma 

 {Hibiscus mutabilts) and spe- 

 cies of Fuchsia ; or by colour- 

 contrast between the flower 

 and the ground. 



Next to colour, odour is the 

 most important allurement for 

 insects, and it is often difficult 

 to decide which of the two is 

 more effective. Odour usually 

 comes from flowers, but in some 

 plants, as in species of Mint, 

 Lavendula, Ruta, Coriander, 

 and Citrus, the smell of leaves 

 and stems is an obvious attrac- 

 tion. Often colour and odour 

 are mutually exclusive. Thus 

 the conspicuously coloured 

 flowers of shial-kanta, Poppy, 

 Azalea indica, &c., are odour- 

 less; while the inconspicuous 

 flowers of Mignonette, Vines, 

 hasna-hana, &c., possess a 

 strong odour. On the other hand, association of 

 colour with odour is not wholly wanting, as in many 

 Roses, Pinks, Magnolias. Odours agreeable to bees, 

 butterflies, and hover-flies are also, as a rule, accept- 

 able to man, while many odours which are pleasing 

 to flies are disagreeable to human beings. Thus 



Fig. 105. — Ghekul or Ghet-kachu 

 { Typhonium trilobatuni) 



sp, Spadix. spa, Spathe. 



