CLASSIFICATION 205 
21. Describe the principal characters of (a) the stem, (b) the 
leaves, (¢) the flower, (d) the fruit, of any plant belonging to 
the N.O. Amaryllidaceae. Name the plant which you describe. 
22. In asystem of classification what significance is attached 
to (a) the modification of the vegetative characters and (6) the 
cohesion, adhesion, and reduction of the floral parts ? 
23. Mention five general characters by means of which you 
could distinguish a monocotyledonous from a dicotyledonous 
plant. 
24. What are the general characters of the Rosaceae ? 
Mention any noteworthy differences exhibited in the floral 
structure of this order. 
