Vegetation of Southeast Asia Studies of Forest Types 1963-1965

THAILAND
Field Investigations
During a period of five and a half months, from November 6,
1963 to January 17, 19&* and from December 17, 196^ to February
27, 1965, the author made a total of 28 trips overland and 9 aerial
surveys throughout Thailand (see Fig. 6), from the border of Burma,
on the west and northwest, to the Mekong river in the east and northeast;
in the Chantaburi-Khlunfi-Trat region in the southeast; and
from the southernmost section of the Peninsula, along the Malaysian
border in the southwestern section.and the Kra Isthmus as far
north and northwest as Nan, Phyao, Chiengdao, and Mae Hongson, near
the border of upper Laos, Shan States and Burma, respectively.
Briefly, the regions and forest types investigated were:
GROUND STUDIES:
Central Region
The vegetation along the Paholyothin-Friendship Highway, from
Bangkok to Saraburi, Nakhon Katchasima, KonKaen, Udon and Ncngkhai
on the upper Mekong river, in the northeast.
In the Khao Yai National Forest, on the Korat Plateau - forest
types, varying according to altitude, from Lowland and Mixed
Deciduous, Hill Evergreen, to Lower-Montane forest.
Dominant vegetation, such as fruit trees and palms, - in rice
paddies, between Saraburi and Ayuthia, in the central plain.
Eastern .Region
The areas around Saraburi, Nakhon Nayok, Chachensao, PrachinburjL,
Kebinburi, Aranyaprathet, eastward to the border of Cambodia -
where Pry Dipterocarp i'orest predominates.
The region around Surin, Ubon, Phibun Mangsahan, toward the
border of southern Laos - also mostly a Dry Dipterocarp forest.
Southeastern Region
From Prakan and the delta of Chao Phraya river, south of Bangkok,
eastward to Rayong, Chantaburi, Khlung, Trat, to the border of
southwestern Cambodia - to study Mangrove forest,. stands of Nipa
palm, and Beach forest.
Slopes on Khao Sa Bap, northeast of Chantaburi - Upper Moist
Evergreen forest.