Leaves dimorphic, squamiform and cladodiform (i.e., deciduous 

 scale-like leaves and persistent leaf-like structures that 

 perform the functions of foliation). 

 Staminate flowers umbellate. 



Anther cells, 2. Strobiles ovoid-cylindric, the scales 

 imbricated with a transverse ridge beyond the 

 middle and not thickened at the apex. 

 Seeds 7-9, erect 10. Sciadopitys. 



Tribe ARAUCARINE.E. 



Flowers monoecious or dioecious. Staminate flowers umbellate or solitary, 

 terminal or axillary. Stamens mostly pendulous and free, with 3-12 or more 

 longitudinally dehiscent anther cells. Cones with the scales spirally 

 arranged, in the twofold structure of which the bract greatly predominates ; 

 the ovuliferous scale confluent and reduced to an inconspicuous cellular 

 projection. Seeds pendulous, free or concrescent with the scale. 



Flowers monoecious. 



Staminate flowers umbellate and terminal. 



Seeds 3, pendulous and free ... ... ... ...11. Ounninghamia. 



Staminate flowers solitary and axillary. 



Seeds solitary, free ... ... ... ... ... 12. Agathis. 



Flowers dioecious, rarely monoecious. 



Staminate flowers solitary or clustered. 



Seeds solitary, concrescent with the scale ... ... 13. Araucaria. 



Tribe ABIETINE.E. 



Flowers monoecious. Staminate flowers terminal or axillary, solitary or 

 spicate, often densely clustered, rarely umbellate. Stamens spirally crowded ; 

 anther cells, 2 ; dehiscence longitudinal, rarely transverse. Scales of fruit- 

 cones spirally arranged, and consisting of two structures, the bract and seed- 

 scale or sporophyll, the former more or less free or concrescent. Seeds 2, 

 inverted. 



Sub-tribe 1. Pinece. 



Fruit-cones maturing in two, rarely in three, years. Leaves 

 dimorphic, the primordial scattered ; the secondary fascicled, 

 persistent 14. Pinus. 



Sub-tribe 2. Laricece. 



Branchlets dimorphic, the one elongated, with the leaves 

 scattered and inserted on cortical outgrowths (pulvini) ; the 

 other arrested or " spur-like," with the leaves fascicled. 

 Fruit-cones maturing in one year. Leaves deciduous. 



Staminate flowers solitary, seed-scales persistent ... 15. Larix. 

 Staminate flowers umbellate, seed-scales deciduous... 16. Laricopsis.* 

 Fruit-cones maturing in two years. Leaves persistent. 



Staminate flowers solitary, seed-scales persistent ... 17. Cedrus. 



Sub-tribe 3. Sapinece. 



Leaves persistent, for the most part homomorphic, and inserted 

 on cortical outgrowths or pulvini decurrent from their base. 

 Fruit-cones maturing in one year. 



* Pseudolarix. Referred to later in the series. 



