18 INTRODUCTION. 



their leaves and verdure throughout all seasons. The Fir tribe 

 (Coniferae) includes nearly all the evergreens of the North : 

 those of the South are far more numerous in kind e. g., the 

 Magnolias, the Live-oaks, Holly, Cherry, Palmetto, etc. 



Review. 39. What of flowering and fruiting ? When do they prove fatal ? An expert 

 ment. 40. Define an annual herb. 41. A biennial herb. 42. Monocarpic herbs. What 

 of the Castor-bean ? 43. Perennial plants. Herbaceous perennials. 44. Woody peren 

 Dials. 45. Shrub. Bush. Undershrub. 46. A tree. 47. The age of trees. How ascer- 

 tained. The "monarch" of trees. Relate its age and dimensiouo. 48. Distinctions in 

 reference to verdure. 



