Practice question

Liliaceae exhibits homochlamydeous perianth where calyx and corolla are not distinguishable morphologically, segments called tepals, typically petaloid, six arranged in two trimerous whorls 3+3 forming perigonium, polyphyllous or slightly gamophyllous with valvate aestivation. This condition reflects monocot ancestry where differentiation into sepals and petals secondarily reduced. Fabaceae shows clear papilionaceous C with standard wings keel, Solanaceae gamosepalous and gamopetalous K(5) C(5), Brassicaceae 4 sepals and 4 petals. Presence of conspicuous coloured tepals hence diagnostically identifies lily, tulip, Gloriosa and Allium as lilioid monocots.