XU INTRODUCTION. 



(The Sun), implying that the plant is of annual duration, because 

 the earth requires a year in performing- a revolution round the sun. 



$ (Mars), a biennial plant ; because that planet is two years in per- 

 forming a similar revolution. 



"U (Ju])iter), a perennial plant or root ; because of the great length of 

 time, 4332 days, required by that planet for such a revolution. 



Tj (Saturn), a shrub or tree, which, living for a great number of years, 

 is represented by a planet requiring nearly 30 years to revolve 

 round the sun. 

 The present volume terminates with the Ferns. A second 



(which also forms the fifth of Sir J. E. Smith's " English 



Flora") including the rest of the Class Cryptogamia, is now 



published, and completes the Flora of the British dominions. 



Glasgow, March ), 1838. 



