XX WOOD S CLASS-BOOK OF BOTANY. 



861. How does it appear that the subject is vast ? 



862. Mention a wrong way to study. 



863. What causes the limits of species ? How may the student become 



acquainted with all the individuals of a species ? 



864. Give an example of this mode of study. 



865. Define a genus. Give an example of a genus. 



868. How are the Genera associated into Orders ? 



869. For example, how is the Order CRCCIFER.E made up ? The Coniferaef 



870. Into what groups are the Orders themselves associated ? 



CHAPTER II. 



873. Subject of this chapter ? Illustrate an artificial classification. 



874. Who was Carl von Linn6 ? What system did he invent ? 



875. What are its defects as a system ? 



876. Are these defects objections to it as a key? Is it now in use? 



877. How many classes in thp Linnasan system ? 



(Further examination at the teacher's option.) 



CHAPTER III. 



886. THE subject? What is the aim of this system ? 



887. How does it differ from the Artificial System ? 



888. What the principle of the species and genera ? 



889. What rule is given as to the relative value of characters ? 



891. As to history, who may be regarded as the founder ? What did he ? What 



did Linnaeus ? Jussieu? Robert Brown ? De Candolle? 



892. What uncertainty in the system yet remains ? 



893. Whence is the difficulty in settling these divisions ? 



894. Is there more than one true Natural System? 



895. What is the first and highest division of the Natural System ? 

 Define the Phsenogamia. The Cryptogamia. 



896. What of the indefiniteness of natural groups ? 



897. Into what two provinces are the Phsenogamia next resolved ? 

 State the diagnosis of the Exogens. Of the Endogens. 



898. What divisions next follow ? Define the Angiospermge. 



Define the Gymnospermfe. Name the two classes formed by the Endogens 

 Describe each. 



899. Into what two provinces is the sub-kingdom Cryptogamia divided ? 

 Define the Acrogens. Define the Thallogens. 



900. What two classes correspond with these two provinces ? Define the 



Angiospone. Define the Gymnosporas. 



901. What name is given to the fourth set of groups ? Are the cohorts quite 



natural groups I Why not ? 



903. Whose plan is generally adopted in this country ? 

 Into what three cohorts are the Angiospermse divided ? 

 Define the Dialypetalie. The Gamopetalse. The Apetalae. 



904. How is the class Petaliferse divided ? Define the Spadiciflorae. De- 



fine the Florideae. 



905. The class Glumiferse is equivalent to what cohort ? 



906. Name the three cohorts of the class Angiosporae. 



907. Name the three cohorts of the class Gymnosporae. 



808. Write on the black-board the synopsis of the Natural System. 



