Dbargh is from the bark of the Oak tree

Dbargh powder - finely powdered bark of the Oak tree
Genus: quercus
class: magnoliopsida
order :fagales
family: fagaceae

http://www.sacredearth.com/ethnobotany/plantprofiles/oak.php

http://www.henriettesherbal.com/eclectic/cook/QUERCUS_ALBA.htm