THE SOUTHERN CYPRESS. Al 
TasBLE 8.—Height of cypress growing in virgin stands, on the basis of age. 
Height. 
Age. Louisiana.! Maryland.? 
Maximum.| Average. | Minimum. |Maximum.| Average. | Minimuin. 
Years. Feet. Feet. Feet. Feet. Feet. Teet. 
10 25 15 5 16 11 4 
20 AQ 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 
7 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 7 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 89 70 129 110 74 
160 109 91 73 132 113 77 
170 110 93 76 136 116 79 
180 ili 95 79 139 118 82 
190 112 97 81 142 121 85 
200 3 98 83 146 124 87 
210 114 99 5S. Ga aR ROE aud [Eu cate pea Oasis 
220 115 100 85 | Hs ich Be trie ac, A eel Le eg ce 
230 115 101 SS GN | eels Spe tyes Aca eon ae ere cae (Ee esp Oe 
240 . 116 102 SY NB se Sw Dene es re Piri | a a Gua 
» BN) Whe 117 103 |‘ Ss ace hte ge esse uni ek Ss See [Cre i ei 
1 Based on sectional age counts of 73 trees, 88 to-793 years old. 
2 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 pies, culminates its rate of 
height growth usually m 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. ~ 
TaBLeE 9.—Height growth by decades for virgin and second-growth cypress in Louisiana } 
and virgin loblolly pine in North Carolina.” 
Decade beginning at age of— 
Species. 20 | 30 | 40 | 50 | 60 | 70 80 90 100 | 110 | 120 | 130 | 140 
Height growth—feet. 
Virgin cy- | 
WEESSoacscuelt. 10) 7 6 5 5 4 4 4 4 4 3 3 2 
Second- 
growth cy- 
DLCSSHe eine 12 11 Hibs 9 9 9 9 8 (3) (3) (3) (3) (3) 
Loblolly pine.| 1 || Say ay et eee ee aa | 4 | eae opel eal ha 
1 See Tables 6, 7, and 8. 
2 Ashe, W. W., Loblolly pine study in North Carolina. Based upon about 1,000 trees. 
3 Figures not available. 
