Practice question

When perianth segments are indistinguishable in colour, texture and shape, each segment termed tepal to avoid mischaracterization as sepal or petal; collectively they form perigonium or perigone. Perianth remains general term for outer whorls ensemble, perigone sometimes used synonymously but strictly means true perigonium in lilioid monocots. Bracteoles are small bracts borne on pedicel, not perianth parts. Tepals occur prominently in Liliaceae, Palmae, Amaryllidaceae usually six arranged in two whorls 3+3 with petaloid colouration and valvate aestivation. Tepal terminology emphasizes homochlamydeous condition considered primitive within monocotyledons.