PINACEAE. 49 
8. Leaves green. C. Deodara viridis. 
Leaves bluish or glaucous. 9. 
Leaves yellow. C. Deodara aurea. 
g. Leaves not whorled. Io. 
Leaves whorled below. C. Deodara verticillata. 
10. Leaves merely blue-green. C. Deodara. 
Leaves very glaucous. II. 
11. Glaucous throughout. C. Deodara argentea. 
Becoming white at the tips. 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. 
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.” I4. 
4. Shrubs. 5. 
to 
Trees: 6. 
5. Conical P. sylvestris columnaris. 
Rounded. P. sylvestris pumila. 
6. Conical. P. sylvestris fastigiata. 
Rather weeping. P. sylvestris pendula. 
Neither conical nor weeping. 7. 
7. Needles very glaucous. P. sylvestris argentea. 
Needles only slightly glaucous. 8. 
