THE SOUTHERN CYPRESS. 41 



Table S. — Height of cypress growing in virgin stands, on the basis of age. 



Age. 



Height. 



Louisiana. 1 



Maryland. 2 



Maximum. 



Average. 



Minimum. 



Maximum. 



Average. 



Minimum. 



Years. 



Feet. 



Feet. 



Feet. 



Feet. 



Feet. 



Feet. 



10 



25 



15 



5 



16 



11 



4 



20 



49 



30 



10 



33 



23 



8 



30 



65 



40 



15 



48 



35 



12 



40 



74 



47 



20 



62 



46 



17 



50 



80 



53 



25 



74 



56 



22 



60 



85 



58 



30 



83 



65 



29 



70 



90 



63 



35 



90 



73 



35 



80 



93 



67 



40 



97 



80 



42 



90 



96 



70 



44 



103 



86 



48 



100 



99 



74 



49 



108 



91 



53 



110 



101 



1 1 



53 



113 



96 



58 



120 



103 



81 



58 



118 



100 



62 



130 



105 



84 



62 



122 



104 



66 



140 



107 



87 



66 



125 



107 



70 



150 



108 



S9 



70 



129 



110 



74 



160 



109 



91 



73 



132 



113 



77 



170 



110 



93 



76 



136 



116 



79 



180 



111 



95 



79 



139 



118 



82 



190 



112 



97 



81 



142 



121 



85 



200 



113 



98 



83 



146 



124 



87 



210 

 220 

 230 

 240 

 250 



114 

 115 

 115 



116 

 117 



99 

 100 

 101 

 102 

 103 



S4 

 85 

 86 

 87 

 88 







































1 Based on sectional age counts of 73 trees, 88 to 793 years old. 



* Based on sectional age counts on 22 trees, also total heights of 77 additional trees, 104 to 199 years old. . 



Cypress, like shortleaf and loblolly pines, culminates its rate of 

 height growth usually in the second decade. Both of the pines, 

 however, make a somewhat faster average annual growth than cy- 

 press. Second-growth cypress in Louisiana, exposed freely to over- 

 head light, increase about 12 feet in the period between the ages of 

 20 and 30 years, while loblolly pine in North Carolina averages about 

 15 feet. In virgin stands the young trees grow up under more or 

 less overhead shade due to the height and density of the cypress 

 canopy, with the result of a decrease in growth. The growth by 

 decades of cypress and loblolly pine is shown in Table 9. 



Tahle 9. — Height growth by decades for virgin and second-grow th cypress in Louisiana 1 

 and virgin loblolly pine in North (Jarolina. 2 



edes. 



Decade beginning at age of— 



20 



30 



40 



50 



60 



70 



so 



90 



loo 



110 



120 



130 



110 



Eelght growth— foot. 



V i r :• . 







/ ii '1 - 



! h <■■ - 



Loblolly pine. 



10 



12 

 IS 



7 



11 



r: 



6 



11 

 10 



9 



9 



7 



1 



9 

 8 



1 



9 



r, 



4 



8 



I 



4 



( 3 ) 

 3 



4 



( a ) 

 3 



3 



3 



(!) 



2 



.'. . w., Loblolly pine study in North ( axolfna. Based upon about 1,000 trees. 



' FigUl I ".!<•. 



