Anglo-Irish. Also flaggan. [Corruped form of FLAGGER1.] = FLAG sb.1
1878–86. Britten & Holland, Plant-n., Flaggan, Iris Pseudacorus L.—Ireland (Belfast).
1882. Hardwicke’s Science Gossip, Feb., 43. Local names of plants. Co. Fermanagh.—Iris, ‘Flagons.’
