i would have to go with the consensius here
elm
that dont look like the hhb i have here
if there are any of last years seads on it
if they are flat and roundish,elm
hhb seed pods look like a "hop" for brewing,hence part of the name "hop"horn beam
either way,split and make a bow or two
but being elm oh hhb,in my experiences,let it dry a few months then split in half,dry for a few more months then quarter it and let it season
doing this way seems to make it easier to split,the moisture content will be down and the wedge wont bounce back so easy
plus it seems to help keep grain twist down too