224 APPENDIX. 



Kemove one of the young seeds from the oldest avail- 

 able fruit and carefully open the seed-coats (testa) with 

 needles under the dissecting microscope. Make a sketch 

 of the embryo thus set free, shewing its radicle and 

 cotyledons. The plumule may possibly also be identified, 

 but it is very small and inconspicuous. 



iv. Cut transverse sections of a young fruit of Goose- 

 berry (Ribes grossularia), mount in glycerine and examine 

 with the low power. Sketch your section, shewing : 



a. ovary formed of two carpels joined together; 



b. numerous hairs on its outer surface ; 



c. vascular bundles and very large cells occurring in 

 the tissues of the carpels ; 



d. several anatropous ovules borne on the two placentas. 



No. XIV. 



THE FRUIT. 



I. Cherry (Prunus cerasus) 



i. Examine a cherry flower, noting the five sepals, 

 five petals and numerous stamens arising from the hollow 

 receptacle. Lay open the flower by slitting it down one 

 side with your knife. Shew on your sketch the insertion 

 of sepals, petals, and stamens on the receptacle, and the 

 single ovary at its base. Cut transverse sections of the 

 ovary and shew on your sketch the two ovules contained 

 in it. 



