360 THE FLOWER 



cells (also very conspicuous), (e) the egg cell and the two synergidtz. 

 Note that the body of the ovule is turned round so that the 

 micropylar end faces towards the placenta. Note also the vascular 

 bundle running from the placenta up the stalk of the ovule 

 to the base of the nucellus. 



(7) Compare the " male " and " female " stages of the corn- 

 cockle (Lychnis), pink (Dianthus), or other strongly protandrous 

 flower. Make careful drawings of longitudinal sections through 

 the flower in each stage. [In Lychnis or Dianthus show the tubular 

 calyx (synsepalous), the separate petals, each with " claw " and 

 " limb " (the limbs forming the alighting platform for insects), 

 the ten stamens, and the (five) carpels joined (syncarpous) 

 to form a single ovary with free central placenta, and five 

 stigmas.] 



(8) Examine a flower of the cherry, and draw a median 

 longitudinal section through it, noting especially the cup-shaped 

 receptacle with sepals, petals and stamens borne on its edge, and 

 the single carpel at the base of the cup, with a long style, which 

 projects above the opening and bears a flat stigma at its summit. 



