hippūris, ĭdis, f., = ἵππουρις,
horsetail , a water-plant; pure Lat., equisetum, Plin. 26, 13, 83, § 132; App. Herb. 39.
HIPPU´RIS(ιππουρίς), a small island in the Aegaean sea, one of the Sporades, lying between Thera and...
Dictionary of Greek and Roman Geography