Ancient tree forum http://www.ancient-tree-forum.org.uk/ancient-tree-forum/
Dave’s Garden http://davesgarden.com/community/forums/f/tas/all/#b
Garden Web http://forums2.gardenweb.com/forums/trees/
Bonsai Tree Forums http://bonsaitreeforums.com/forums/
Forum Trees http://conexxeurope.eu/landing/forum-trees/?lang=en
Thorn Tree Forum https://www.lonelyplanet.com/thorntree
Tree Buzz http://www.treebuzz.com/forum/
UBC Botanic Garden Forum http://www.botanicalgarden.ubc.ca/forums/forumdisplay.php?f=146
Daleys Fruit Tree Forum http://www.daleysfruit.com.au/forum/
University of the Trees http://www.universityofthetrees.org/
The Bell Trees Forums http://www.belltreeforums.com/
Herefordshire Tree Forum http://www.herefordshiretrees.net/
Florida Palm Trees http://www.florida-palm-trees.com/palm-tree-forum/
Native Tree Society BBS http://ents-bbs.org/
Webtrees http://www.webtrees.net/index.php/en/forum/index-en
Seven Trees Forum http://www.topix.com/forum/city/san-jose-ca-seven-trees
eflora of India https://groups.google.com/forum/#!forum/indiantreepix
India Trees Foundation http://www.indiatrees.co.nr/
Plant Identification Discussion Forum http://davesgarden.com/community/forums/f/plantid/all/#b
Family Tree Forum http://www.familytreeforum.com/content.php?s=272505eb1852740ebd262671ecc849c8
Gardening Forum http://www.helpfulgardener.com/forum/