Treebillion is the number of leaves on average elm tree (an "elmo" for short), ash tree (an "ashy" for short) and an oak tree (an "okay" for short) combined and multiplied to the 5th powers.

ELM

American-elm.jpg

ASH

GettyImages-200443720-0011-59a2f08fd088c000111be4f4.jpg

OAK

1500white oak M 620x.jpg

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