Poales - contains grasses, cattails, bromeliads and sedges; includes most food crops, grasses grow with rhizomes or in tight clumps and are wind pollinated, sepals and petals highly reduced; rushes and sedges grow in marshy areas, have reduced flowers and small, dry fruit; cattails grow in ponds and marshes, spread with rhizomes, have staminate and carpellate flowers with thousands of each; bromeliaceae are tropical epiphytes or xerophytic