PlNACEAE. 



8. Leaves green. 



Leaves bluish or glaueous. 

 Leaves yellow. 



9. Leaves not whorled. 10. 

 Leaves whorled below, 



10. Leaves merely blue-green. 

 Leaves very glaucous, n. 



11. Glaucous throughout. 

 Becoming white at the tips. 



49 

 C. Dcodara viridis. 



C. Deodara aurea. 



C. Deodara verticillata. 

 C. Deodara. 



C. Deodara argentea. 

 C. Deodara albo-spica. 



PINUS. Pine. 



Conical or openly branched evergreen trees with soft and 

 white or hard and yellow ductless abundantly resinous wood ; 

 moderate roundish twigs ; small homogeneous pith ; 5-ranked 

 spurs crowned by tufts of usually 2, 3 or 5 elongated needle-like 

 "leaves" or phylloid shoots ; round spur-scars ; narrowly crescent- 

 shaped scale-scars ; no stipule-scars ; ovoid sessile buds with 

 sometimes resinous scales ; monoecious naked catkin-like or cone- 

 like naked flowers; and cones with 2 usually thin-winged seeds 

 above each of the mostly thickened scales. 



1. Needles 2 in a cluster. 2. 



Needles prevailingly 3 in a cluster. 15. 

 Needles 5 in -a cluster. 16. 



2. Branches orange or red. 3. 

 Branches grayish or black. 9. 



3. Needles short (4-8 cm.), bluish: bark orange. 4. 

 Needles long (10-15 cm.), green. 14. 



4. Shrubs. 5. 

 Trees. 6. 



5. Conical P. 

 Rounded. 



6. Conical. 

 Rather weeping. 



Neither conical nor weeping. /. 



7. Needles very glaucous. 

 Needles only slightly glaucous. J 



sylvestris columnaris. 



P. sylvestris pumila. 



P. sylvestris fastigiata. 



P. sylvestris pendula. 



P. sylvestris argentea. 



