KEY TO THE SPECIES 



I. PINACEiE (Pine Family) 



Trees or sometimes shrubs, evergreen, more or less resinous ; 

 leaves needle-shaped or scale-like ; staminate and pistillate 

 flowers on the same individual (except in Juniperus) ; the 

 male clusters of an indefinite number of stamens only ; the 

 female of few to many scales which become in fruit a dry 

 cone, with 2 or more ovules at or on the base of each scale. In 

 Juniperus the fruit is small, semi-fleshy, and berry-like. (See 

 Plant Structures, Conifers, p. 191.) 



» Fruits becoming dry cones. 



1. Pinus. Leaves in bundles of 2-5. 



3. Flcea. Leaves single, sharp-pointed. 



3. Pseudotsuga. Leaves single, blunt-pointed. 



* * Fruits semi-fleshy, berry-like. 



4. Juniperus. Leaves scale-like or awl-shaped. , 



1. PINUS (Pine) 



Trees ; leaves of two kinds, the primary ones early deciduous, the secondary 

 (ordinary foliage) slender, needle-shaped, in bundles of 2-!>, united at the base by a 

 sheath formed from the bud-scales ; cones large, the scales becoming thick and 

 woody and bearing 2 seeds on the base of each scale, not maturing till the second 

 year. 



* Leaves 2 in each bundle. 



■*- Scales tipped with delicate recurved prickle ; seeds winged. 



1. Pinus Murrayana " Oreg. Com." (Lodgepole Pine). Usually growing 

 in dense groves or forests and then tall (15-30 m.) and very slender, nearly devoid 

 of branches except at the summit ; if growing in more open ground, more freely 

 branched and stockier ; leaves semi-terete, rather rigid, about 5 cm. long ; cones 

 small, adhering tenaciously to the branches, which are often marked by the dead, 

 persistent cones of the previous years ; scales closely compacted, with quadrangur 

 lar ends. Common ; preferring moist ground. 



-*- Scales without prickles ; seeds wingless. 



2. Pinus edulis Eagelm. (Pinon or NnT Pine). A low round-topped tree, 

 freely branched, often from the base ; leaves paired (rarely in threes), 3-4 cm. 

 long, rigid ; cones of few scales, sub-spherical ; scale with thickened pyramidal 

 tips ; seeds edible. 



* ♦ Leaves 3 in each bundle. 



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