bract epidermis bract abaxial epidermis PO:0025159 2010-11-15T02:35:37Z 苞背軸側 表皮 (Japanese, exact) bract external face (exact) epidermis abaxial de la br&#225ctea (Spanish, exact) plant_anatomy rwalls A portion of bract epidermis (PO:0025158) that covers the abaxial/lower surface of a bract (PO:0009055).