\:M\ I'iki.i) ATanuai, 



7. tarpcls of the fruit forniitifr dehiscent follicles at 

 iiiaturity ; the Heshy seeds suspended from the pink 

 or rose tissues of the fruit by slender threads. Mag- 

 nolia. (12). 



7. Carpels samara-like, dry and indehiscent. Lirioden- 



dron. (13). 



8. Cones with numerous ovuliferous scales, more than 



15. 9. 



<^. Cones with 3-12 ovuliferous scales. 12. 



!>. Cones erect, tiieir scales deciduous from the per- 

 sistent axis; ovuliferous scales orhicular or hroad. 

 obtuse. Abies. (5). 



9. Cones pendulous or projectint^" from the hranch, the scales 



persistent. 10. 

 10. Cone scales woody and thickened at the outer end, 

 elongated, often with a rigid point, spine, or 

 prickle. Pinus. (7). 



10. Cone scales suh-obicular or -oval, sometimes with 



erose or emarginate tips. 11. 



11. Cone with subulate leaf-scales at the base. Larix. (6). 

 11. Cone without subulate leaf-scales at the base, short 



and ovoid, usually less than 1]4 in. long. Tsuga. (4). 



11. Cone without subulate leaf-scales at the base, cylindric 



or long ovoid, usually 1-6 in. long, scales often 

 with erose or emarginate tips. Picea. (3). 



12. Carpels spirally arranged. 13. 



12. Carpels opposite. 14. 



18. Cone globose, the scales closely compressed on the 

 outside, seeds not winged. Taxodium. (2). 



13. Cone ovoid, with subulate leaf-scales at the base, the 



carpellate scales loose and open ; seeds somewhat 

 winged. Larix. (6). 



14. Carpels imbricate, not shield-shaped, with 1-3 (usually 



2 seeds). 15. 



14. Carpels shield-shaped, with 2-3 seeds, more or less 



winged. Chamaecyparis. (10). 



15. Carpels 6-8, the four upper fertile. Thuja. (8). 



15. Carpels 4-6, the two upper fertile. Libocedrus. (9). 



16. Fruit globose, over 2 in. in diameter. 17. 

 ](\. Fruit elongated, ovoid or cylindrical. 18. 



