So I think I found the missing link with the antique flute woods. The wood is called Kokra, it was imported from West Bengal, as a alternative to the Cuban Cocuswood.
Here is where it is referenced in "Journal of botany, British and foreign, Volume 41"
Sounds like this stuff was quite prevalent in flute building. I have not found many antique flutes made from Cocus (Brya ebenus), but rather Kokra (Liquidambar styraciflua). Not to say that the former hasn't had it's share of cracks, but the cracks usually stay closed, once they are properly repaired. There seems to have been more American flutes made from the Cuban variety, pre-Castro, I imagine there was a lot of trade going on, back then...With regard to the use of Liquidambar styraciflua which has been dubbed American red gum for the purpose of the wood paver though its capabilities would seem not to equal jarrah or karri it is probable that much of the wood used in the experimental trials was either unsound or badly seasoned If the West Indian green ebony (Brya ebenus) is correctly identified as seems practically certain with the Cocus wood of the flutemakers it is scarcely enough to say (p 103) that it is considered well fitted for this purpose. It is if we are not mistaken the very best wood for wind instruments after proper seasoning exposure to air dry heat and wrapping in flannels soaked in linseed oil its resonance is very marked In connection with this wood it is interesting to note at (p 196) under Ebony American Green Jamaica or West Indian the names Cocus or Kokra of Jamaica This latter is a Bengalese name for Aporosa dioica of which Dr Watt in his Dictionary of the Economic Products of India writes This has by botanists been identified as the tree which yields in the West Indies the coco wood of commerce The Indian plant should be carefully examined to ascertain if the wood obtained from it is of equally good quality with that obtained from the West Indies The question then arises Are there two cocus or kokra woods one from a leguminous and the other from a euphorbiaceous plant