APPENDIX. 



135 



compound ovaries, and explaiu the origiu of these 



variations. ,, 



12. Mention the principal modes in which pollen 

 gains access to the stigma. What are hybrid plants, 

 and how are they perpetuated ? 



13. Describe the anatomy of a leaf. \\ hat are 



stomata? , „ -rw u 



14. ^Yhat is the placenta in a seed vessel ? Describe 

 the different modes of placentation. Shew how the 

 varietiesiof placentation agree with the " altered-leaf 

 theory " «f the pistil. 



15. Give the characters of the Compositae. How is 

 the order subdivided ? Describe the composite flower, 

 and mention some of the common Canadian examples 



of this order. „ ^ , . i i r 



16. Give the peculiarities of Endogens in seed-leat, 

 leaf, and stem. Subdivide tlie class. Describe shortly 

 the orders Aracere and Graminea?. 



17. Describe the wall of a seed-vessel, and notice it8 



varieties of form. 



18. What is meant by the dehiscence of a capsule .-^ 

 Shew the different modes in which pods dehisce, and 

 give examples of each. 



19. Give the characters and orders of Gymnosper- 



mous Exogens. -n. u 



20. Give the characters of Ranunculaceae. Describe 

 shortly r.ome of the principal plants of the order. 



21. Give some account of the sprcuil fonns which the 

 leaves of plants assume. j , o 



22. What are stipules ? What their size and shape ? 



23. What 19 meant by Imperfect, Incomplete, and 

 Unsymmetrical flowers respectively ? 



24. Describe Papilionaceous- and Labiate corollas. 



25. Write notes on Abortive Organs, Gymnosper- 

 mous Pistil, and Pollen Granule. 



26 Distinguish between tiie essential and non-essen- 

 tial materials" found in plants, and notice the non-es- 

 sential. , Til . i 1 e 



27. What is vegetable growth ? Illustrate by a ret- 



