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Vegetation of Southeast Asia Studies of Forest Types 1963-1965

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Figure 40.-Riverain or Gallery forest along banks <strong>of</strong> streams flowing into<br />

the Mekong River, eastern Thailand. Average height <strong>of</strong> canopy in<br />

this forest is 50 feet (16 m). Undergrowth is moderately dense. East<br />

ot Phibun Mangsahan, near border <strong>of</strong> southern Laos. Dec. <strong>1963</strong>.<br />

p<br />

Figure 41.-Gallery or riparian forest. During the dry season the rainfall,<br />

over the greater part <strong>of</strong> central and northern Thailand, is too sparse to<br />

support Evergreen forest growth. However, the supply <strong>of</strong> underground<br />

moisture along streams and rivers is sufficient for the development <strong>of</strong><br />

Gallery forest in narrow belts. Characteristic trees in this forest<br />

type include Dipterocarpus alatus, D. costatus, and Hopea qdorata.<br />

I-iae Hoi, nortnern Thailar^L<br />

126

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