List of Late Blooming Trees for Zone 6

Late Flowering Trees are important in zone 6 anybody who wants to contribute to a list of some late flowering trees would be much appreciated.

The flowers of Chestnut tree follow the leaves, appearing in late spring or early summer[18] or into July.

http://en.wikipedia.org/wiki/Chestnut

cheers
Jeremy

Selection of late leafing, late flowering, laterally fruitful walnut (Juglans regia) types in Turkey


http://www.tandfonline.com/doi/abs/10.1080/01140671.2004.9514313#.U0YbqfldXpU

hi there! looking for nitrogen fixing trees for zone7 any advice on what trees to look for??

Small-leaf linden (Tilia cordata) - late May
Bee-bee tree (Euodia / Tetradium) - July?
Bean tree (Catalpa) - June
Koelreuteria paniculata - June
Firethorn (not technically a tree but can get large) - May, June

These are all also good bee forage.

My elderberry still has a few blossom left on it.
Not too sure if bees use jujube if so add it to the list.