The longleaf pine in virgin forest ; a silvical study . ly of scrubby forms of oak and occa-sional bushes of dogwood and gallberry, scatteredhere and there through the forest. Sometimes the Longleaf Pine in Virgin Forest TABLE I. One Acre of Virgin Longleaf Pine County, Alabama. Diameter atbreast-height. Number of Heights offive selected Inches trees. sample trees. lO I 85 12 3 14 6 100 16 Q 18 10 109 20 7 102 22 9 24 4 114 26 3 28 I oaks occur in dense clusters, but they rarely covercontinuous areas like those so commonly found inthe cut-over and badly burned pineries on the At
The longleaf pine in virgin forest ; a silvical study . ly of scrubby forms of oak and occa-sional bushes of dogwood and gallberry, scatteredhere and there through the forest. Sometimes the Longleaf Pine in Virgin Forest TABLE I. One Acre of Virgin Longleaf Pine County, Alabama. Diameter atbreast-height. Number of Heights offive selected Inches trees. sample trees. lO I 85 12 3 14 6 100 16 Q 18 10 109 20 7 102 22 9 24 4 114 26 3 28 I oaks occur in dense clusters, but they rarely covercontinuous areas like those so commonly found inthe cut-over and badly burned pineries on the Atlan-tic side of the belt. Toward the hilly country of theinterior, particularly in the more open spaces of theforest, the undergrowth increases; but here, too,the forest remains essentially one of pure longleafpine. The surfacegrowth consists of various kinds ofgrasses, among which wire-grass {Aristida stridaMichx.) and broom-sedge or broom-straw (Andro-pogon virginicus L.) are the most common. Thebroom-sedge is the taller and stockier of the two, and. Pig. I.—Typical Virgin Forest of Longleaf County, Alabama. Character of Forests 7 is especially noticeable in the vicinity of the coastand near the forest borders. The wire-grass, whichvaries from one to several feet in height, is morewavy in appearance and grows abundantly almosteverywhere throughout the pine forests. In fertileplaces, and where protected from constantly recurringfires, its growth is characteristically dense and localities that have escaped fire for a number ofconsecutive years a thin layer of pine-needles, smalllitter and rotted grass gradually accumulates on thesoil, and in the denser parts of the forest the wire-grass is often replaced by a rich layer of mold severalinches in depth. The soil in these forests has been formed fromthe sands and gravels of late Tertiary times, and isunderlaid by a stratum of clay at a depth varyingfrom two to five feet. At the surface the sand isoften near
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