50 COMPANION TO TROPICAL READERS 



just before it opens; remove the stamens; put a paper 

 cover over the plant, and observe that seeds will not 

 be produced. 



Expt. 65. How Plants prevent Self-fertilization. 



(a) Stamens and Pistils on Different Flowers. Examine 

 and make a list of six plants that have been found, on 

 examination, to possess stamens and pistils on different 

 flowers, e.g. begonia, pumpkin, corn, melon. 



(b) Different Sexes on Separate Plants. Make a list of 

 four plants, the staminate flowers of which are on dif- 

 ferent trees from the pistillate flowers, e.g. nutmeg, 

 genip. 



Expt. 66. Flowers with Honey. Make a collection 

 of ten flowers in which honey or nectar may be found, 

 e.g. logwood, genip, silk - cotton, mangrove, ebony, 

 mango. 



Expt. 67. Nectaries or Special Receptacles for 

 Honey. Make drawings of three flowers that have 

 specially developed nectaries, e.g. nasturtium. 



Expt. 68. Pollen carried by Insects. Examine a 

 number of bees visiting flowers and observe how pollen 

 adheres to them. 



Expt. 69. Flowers visited by Birds and Insects. 

 Make a list of flowers that you have observed being 

 visited by 



(a) Hwmming birds: e.g. poinciana, monkey fiddle, 

 hibiscus ; 



(b) Bees: e.g. genip, logwood, ebony, "six months 

 green and six months red"; 



(c) Butterflies: e.g. Barbados pride, vervain, sage; 



(d) Moths at night: e.g. ragged lily, tiger lily, wild 

 ginger, evening glory. 



Expt. 70. How Flowers attract Insects. 

 (a) Collect six flowers with brightly coloured petals, e.g. 

 Bauhinia, ebony, lignum-vitae. 



