Wind pollination is common in

Wind-pollinated flowers produce light, non-sticky pollen in large amounts, have well-exposed stamens and large, often feathery stigmas to trap air-borne pollen, and often have a single ovule in each ovary.
NCERT states that wind pollination is quite common in grasses; the tassels of the corn cob are the stigmas and styles that wave in the wind to trap pollen.
Orchids, legumes and lilies have showy, coloured flowers with nectar or other rewards and are pollinated by insects.
Hence wind pollination is common in grasses.