No coordinates survive, no local tradition has been traced to a particular spot, and the tree or bush itself is long gone. What remains is a single bibliographic footnote and the place-name that carries a memory of something once considered sacred.

The sole source is a reference in Adams (1881), at page 492, which records the existence of a holy tree at Poppintree, a townland in the barony of Castleknock, County Dublin. Holy trees and bushes were a recognisable feature of the Irish devotional landscape, typically associated with a nearby holy well or a pattern day, the annual gathering at a sacred site on a saint's feast day. Rags, ribbons, and small offerings were tied to the branches as acts of petition or thanksgiving, and the tree was understood to be under some form of protection; cutting or harming it was considered unlucky. Whether the Poppintree example was connected to a well, a saint's cult, or some older local observance, Adams does not say, and nothing further has been identified. The record was compiled by Geraldine Stout and uploaded to the database in August 2011, with the location marked as unknown.

The townland name itself is suggestive. Poppintree is now largely absorbed into the northern Dublin suburbs, an area of housing estates and arterial roads, and the landscape that Adams would have known has been substantially altered. There is no marked site to visit, no surviving tree, and no tradition that has been publicly documented to point a visitor in any direction. The entry sits in that particular category of heritage record where the evidence is real but the thing itself has vanished, leaving the name of the place doing most of the work of preservation.