Northern Triangle temperate forests

The Northern Triangle temperate forests is a temperate broadleaf and mixed forest ecoregion of thick forest covering the mountains of northern Myanmar.

The Northern Triangle temperate forests occupy the southern slopes of the Namkiu Mountains, the easternmost extension of Himalayas, and extend southeast along the Patkai Range on the border between Myanmar and India, in Kachin State and Sagaing Division of Myanmar, an area that is part of the Golden Triangle. The mountains run north to south towards the central plain of Myanmar and the forests lie between 1,830 and 2,700 metres in elevation. The Chindwin, Mali, and N'Mai Rivers all have their sources in these mountains and run south to join the Irrawaddy River.

The Northern Triangle subtropical forests lie to the south, while the Eastern Himalayan broadleaf forests lie to the northwest across the Patkai Range. The Eastern Himalayan alpine shrub and meadows bound the ecoregion to the north. The Northern Triangle temperate forests are similar to the Eastern Himalayan broadleaf forests, which occupy the middle elevations of the Himalaya range in Eastern India, Bhutan, and eastern Nepal, and extend along the north slope of the Patkai range in Arunachal Pradesh.

The main plant communities of the Northern Triangle temperate forests are broadleaf forests and mixed forests. The forests are diverse, blending plants characteristic of the tropical floras of the Eastern Himalayas with those of Assam, the Indian subcontinent and Indochina and the temperate floras of the Himalayas and China and even some relict plants of the ancient continent of Gondwana. Furthermore the Northern Triangle Temperate forests have been little explored by scientists since the work of Frank Kingdon-Ward in the 1920s and 1930s and their biodiversity is likely underestimated.

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