THE CLUSTER PINE 37 



cone, and terminating in a central blunt point or 

 prickle. 



The principal genera of the tribe Abietince may 

 be grouped as follows : — 



Sub- tribe Pinecs. Branches whorled ; long and 

 short shoots both present ; long shoots with scale- 

 leaves only, needle-leaves fascicled on the dwarf shoots, 

 evergreen ; cone-scales thickened at the apex ; seeds 

 ripening in two or three years. — 1. Pinus. 



Sub-tribe Lari'ceoe. Branching irregular; long 

 and short shoots both present ; needle-leaves on 

 both kinds of shoots, fascicled on the dwarf shoots ; 

 cone-scales flat. 



Seeds ripening in two or three years ; cone-scales 

 persistent ; leaves evergreen. — 2. Ge'drus. 



Seeds ripening in one year ; leaves deciduous. 



Cone-scales deciduous. — 3. Pseudola'rix. 



Cone-scales persistent. — 4. Larix. 



Sub-tribe Sapi'nece. Branches whorled ; shoots 

 of one kind only, i.e. long, no dwarf ones ; leaves 

 of one kind, arranged singly ; cone-scales flat ; seeds 

 ripening in one year. 



Leaves four-angled; with one or two lateral resin- 

 canals : cones pendulous, falling off entire. — 5. Picea. 



Leaves flat, with a central resin-canal ; cones 

 pendulous, falling off entire. — 6. Tsuga. 



Leaves flat, with two lateral resin-canals ; cones 

 pendulous, falling off entire. — 7. Pseudotsuga. 



Leaves flat, with two lateral resin-canals ; cones 

 large, erect, falling to pieces when ripe. — 8. Abies. 



As will be seen by this table, the Pines, the most 

 specialised members of the series, occupy a very dis- 



