Included here are tropical parts of Laos, Vietnam, Cambodia and a small part of Thailand.

South Indochinese Swamp Forest

These forests occur throughout the BioProvince in swampy areas and are also found on wet sandy soil in the Kampong Thom area of Cambodia. In Cambodia Melaleuca cajuputi seems to be the exclusive dominant of many of these forests, while other species include Parinari annamensis. Vast areas of swamp forest also occur in Mekong floodplains. Typical species here include Adina cordifolia, Calophyllum inophyllum, and Sandoricum indicum together with species of Eugenia, Elaeocarpus and Sterculia. Palm species are conspicuous and in some areas almost pure stands of the endemic Livistona cochinchinensis (Arecaceae) occur. Melaleuca cajuputi is also common here particularly in exploited valley bottoms or on humus-rich soils where it forms stands with bushes of Alstonia spathulata, Polybotrya appendiculata and Stenochlaena palustris. On more sandy soils Melaleuca cajuputi forms assemblages with other species such as Ilex godajama. In the immediate hinterland of mangroves forest in areas less affected by brackish water another species of Melaleuca (M. leucadendron) can be found.

References

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