family Iridaceae - large family of usually perennial geophytic herbs with rhizomes or corms or bulbsliliid monocot family - family of monocotyledonous plants of the subclass Liliidae; mostly herbs usually with petaloid sepals and petals and compound pistils Liliales, order Liliales - an order of monocotyledonous plants including Amaryllidaceae and Liliaceae and Iridaceae genus Iris - large genus of perennials that develop from bulbs or rhizomes genus Crocus - a monocotyledonous genus of the family Iridaceae |