GYMNOSPERMS ON STANFORD GROUNDS ABRAMS 85 



base on the upper surface (scales coalescent and fleshy in Juniperus] ; seeds 



often winged. 



Leaves and cone-scales spirally arranged. 



Leaves usually broad at base and tapering to a sharp point ; ovules and 



seed 1 to each scale. Tribe 1. Araucarece. 



Leaves linear or needle-like. 



Leaf -bases not decurrent on twigs ; ovules and seeds 2 to each scale, 



pendent. Tribe 2. AbietecB. 



Leaf-bases decurrent on twigs; ovules and seeds several to each scale, 



erect. Tribe 3. Taxodece. 



Leaves and cone- scales opposite, the former often scale-like. 



Tribe 4. Cupressece 

 Tribe 1. Araucareae. 



A very distinct tribe composed of the two genera A gat his and Araucaria. 

 These are almost wholly restricted in their distribution to the tropical or 

 extra-tropical realms. 



Scales persistent; seeds free. 1. Agathis. 



Scales deciduous; seeds adherent. 2. Araucaria. 



1. Agathis. 



Leaves opposite or alternate, ovate-lanceolate, attenuate, parallel-veined 

 and of a firm leathery texture. Flowers dioecious, solitary, the staminate 

 elongated. Cones ovate to globose, axillary; scales persistent; seeds winged 

 only on one side, free. 



1. Agathis loranthifolia Salisbury. Amboyna Pine. 



Leaves opposite or sometimes alternate, 1^-4 inches long, ovate-lanceo- 

 late, glaucous green; staminate flowers 2 inches long; cones globose or tur- 

 binate, 3-4 inches long. 



A large forest tree, often 8 to 10 feet in diameter and 100 feet or more 

 high. Native of the mountains of the Malay Archipelago. One young 

 specimen, which seems perfectly hardy in this climate, is in Professor 

 Durand's garden. 



2. Araucaria. 



Leaves evergreen, flattened, lanceolate or short-ovate to awl-shaped, 

 usually sharp-pointed. Flowers normally dioecious ; cones erect, their scales 

 deciduous; ovules and seeds 1 to each scale, pendent; anthers with several 

 elongated pendent pollen-sacs. 



Araucaria is represented by 10 species, all of which are restricted to the 

 southern hemisphere. 



