Medieval Alchemical Symbol for Wood

As far as Indo-European Alchemy Goes, what Alchemical Symbol should I use for Wood?
Earth, Fire, Wind, Water, or use Chinese Symbol for Wood(looks more like calligraphy than alchemical symbols)?

 

I'm not sure if these are of legitimate provenance, but these two tables both list a symbol for wood. (It's on the bottom row on both. It's the one that looks like it should mean "supernumerary testicle")

http://www.dundjinni.com/forums/uploads/dblade/7CZ_AlchemySymbols03.jpg
http://4.bp.blogspot.com/-jGYK6Q3LQ...AACCc/YBmrSgg0mCw/s1600/alchemy+symbols+4.png

 

Thanks! Looks kinda like a Heart(split in 3) with a long Arrow sticking out of the top if you view it in super low res from far away!