Do you really want to send Webster 1913 a message saying you like their work?
Pur`pu*rog"e*nous (?), a. [L. purpura purple + -genous.] Biol.
Having the power to produce a purple color; as, the purpurogenous membrane, or choroidal epithelium, of the eye. See Visual purple, under Visual.
© Webster 1913.