14 A HANDBOOK OF CONIFERS 



IV. Araucarine^ (The Araucaria Tribe), 



Trees with spirally arranged narrow or broad leaves. Buds 

 not scaly. Male and female flowers on the same or on different 

 trees. Anther cells pendulous. Cones globular ; scales very 

 numerous, spirally arranged, apparently single by the consolidation 

 of bract and scale, the latter being relatively small. Seeds 1-6 

 to each scale. 



CunningJiamia . 



Leaves flat. Male flowers in terminal umbellate clusters. 

 Cones globular. Scales persistent. Bracts long, leafy, spreading 

 at the points. Seeds 3 to each scale, winged, pendulous. 



Taiwania. 



Adult leaves, scale-like. Cones sub-globose with numerous 

 scales. Secondary scales absent. Seeds 2 to each scale. 



Agatliis. 



Leaves usually broad and flat. Cones globular, the scales 

 separatmg when ripe. Seed 1 to each scale, free, obliquely 

 winged, pendulous. 



Araucaria. 



Leaves lance-shaped or awl-shaped, spirally arranged. Cones 

 globular, scales very numerous, deciduous. Seed more or less 

 winged, united with the scale. 



KEY TO THE GENERA IN CULTIVATION 



The following key, based on well-marked characteristics of 

 shoots, winter buds and foliage, will enable the beginner to 

 identify the genus of any conifer he is likely to meet with in 

 cultivation and should be used in conjunction with the keys to 

 the species which will be found under the respective genera. 

 The keys are only intended for use with specimens having mature 

 foliage taken from well- developed lateral branches. The diag- 

 nostic characters are easily seen with the naked eye or with a 

 pocket lens magnifying 8 diameters. The position and number 

 of the resin canals in Abies and Pinus are best observed by examin- 

 ing a thin transverse section of the leaf under a compound micro- 

 scope, but in the case of Abies they can often be made out by 

 squeezing the leaf after it is cut across, when the resin wiU be 

 seen exuding from the two canals. 



