SYLVICULTURE 



The ejiideta "paucivendible", '■multiveiidible" and "omnivendible" 

 added to the terms "selection form", "group form" and "compart- 

 ment form" readily explain, in crude lines, the sylvicultural as well 

 as the economic display of a primeval forest. 



The groups or the compartments often show a sprinkling of 

 huge trees known as "standards", having a much higher age and 

 frequently belonging to a species different from that or those form- 

 ing the main growing stock. Instances are: 



Yellow Poplar standards in Beech compartments; 



White Pine standards in Balsam compartments; 



Yellow Pine standards in Oak groups; 



Cuban Pine standards in Cuban Pine groups. 



Long-leaf Pine standards in Cuban Pine groups. 



Naturally, where the standards belong to several age-classes and 

 do not form a distinct age-class by themselves, we merely meet a 

 selection forjn. 



Standards in primeval woods are 'frequent enough to call for 

 the singling out of a fourth form, namely: 



d. A standard form, whicli might lie again subdivided into: 



A form of :;tandards over groups; 



A form of standards over compartments. 



A variety of the latter subform found in the Chaparal thickets 

 of California and in the Calmia thickets of North Carolina might 

 be termed "form of standards over paucivendible compartments." 



The two-storied high forest is often formed by two or more 

 distinct species appearing in distinct forms. It had better be con- 

 sidered as a combination of forms, one form being grafted upon 

 another (f. i., multivendible compartments of Douglas Fir grafted 

 upon the paucivendible selection form of Hemlock) ; or one form 

 being wedded w'ith another (f. i., multivendible gioup form of Long- 

 leaf Pine wedded with paucivendible compartments of Black Jack 

 Oak). 



The term "two-storied high forest" properly applies only to a 

 permanent combination of two tiers of trees (representing one or 

 more species), each tier emanating from regeneration of the com- 

 partment type of n. s. r. It is a compartment form wedded with a 

 compartment form. 



III. Treatment of primeval forests: 



The only treatment required is of a protective, not of a sylvi- 

 cultural character. 



As long as the forest retains its primeval display, unhampered 

 by human interference, the regeneration of the primeval selection 

 form is of the cleared, shelterwood or advance growth selection type; 

 L3S 



