I pointed out the error to Joe Court, webmaster of the Wakefield website (the other site to list it) and got this in return:

"The correct entry for "worship of trees" is dendrolatry, which is
already listed. I have removed the entry for arbrolatry[sic] since on checking with the Oxford English Dictionary the word doesn't exist." link

huh, or, now there's a narrow view. (although, looking at the various OneLook entries, the ultimate source seems to be WordNet. link )