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"[Plin. Nat. 25.99.] - THE ARBORESCENT CAPNOS: THREE REMEDIES.
There is another kind of capnos also, similar both in name and properties, but different in appearance. It is a branchy plant, is extremely delicate, has leaves like those of coriander, is of an ashy colour, and bears a purple flower: it grows in gardens, and amid crops of barley. Employed in the form of an ointment for the eyes, it improves the sight, producing tears in the same way that smoke does, to which, in fact, it owes its name. It has the effect also of preventing the eyelashes, when pulled out, from growing again.”
(The Natural History. Pliny the Elder. John Bostock, M.D., F.R.S. H.T. Riley, Esq., B.A. London. Taylor and Francis, Red Lion Court, Fleet Street. 1855.)