214 TRILLIUM. 



In a transverse section through the compound ovary notice, 

 under low power, 



f. The uniform, continuous epidermis. 



g. The loose parenchyma tissue of the wings and walls. 

 h. The fibro-vascular bundles under the sinus between 



each pair of wings, and the groups in the placen- 

 tae. The latter give off branches to 

 /. The ovules, placed back to back in the ovarian 

 cavities. Note 

 i. The thick stalk, funiculus, joined to the side 



of the ovule, quite inverting it (anatropous]. 

 ii. The two coats of the ovule, the inner protruding 



from the outer, 

 iii. Draw. 



iv. If a section passing through the center of an 

 ovule has been obtained, note the nucellus 

 within the inner coat, and 

 v. In the center of the nucellus the small embryo 



sac. 



vi. Draw. 



Under high power, notice 

 / The epidermis and loose parenchyma at the base 



of a wing. Draw. 

 k. The nbro-vascular bundle of the wall, showing a 



little phloem only on the outer side. Draw. 

 /. The parenchyma and fibro-vascular bundles of the 



placentae. Draw a part. 



m. Where the section has passed through the center 

 of an ovule, note the similarity of the cells of all 

 the parts. Draw. 



F. THE FRUIT. So little change has taken place in the 

 growth of the fruit that it is only necessary to study the 

 minute anatomy of 



