A NATURAL ARRANGEMENT 



OF 



ALL THE GENEKA ENUMERATED IN THE PINETUM. 



Order I. PINACE^, the Pine Race. 



Tribe I. ABIETINE^,tlie Fir Tribe, having numerous 

 scales, an-anged on a more or less elongated axis on 

 the Cones. 



Sec. I. ABIETINE^ VER^E, Cones, with numerous scales, arranged 

 on a more or less elongated axis. 



Gen. PiNtJs Linnceus (the True Pines). Leaves, in sheaths, 

 of two, three, or five, somewhat cylindrical and 

 persistent. 



Flowers, male and female on the same plant, but 

 separate. 



Cones, more or less conical, wood)', and com- 

 posed of scales. 



Seeds, oval, with a hard, bony shell, and either 

 furnished with an ample wing, or wingless. 

 1st division, Bin^, or those kinds having two leaves in 



a sheath. 

 2nd division, Ternat^, or those kinds having three 



leaves in each sheath, 

 3rd division, Quin^, or those kinds having five leaves 

 in each sheath. 

 Geti. Abies, Don (the Spruces). Leaves, solitary, four-sided' 



