Cattails

Typha  is a genus of about 30 species  of monocotyledonous flowering plants in the family Typhaceae.  The genus has a largely Northern Hemisphere  distribution, but is essentially cosmopolitan, being found in a variety of wetland  habitats. These plants have many common names. They may be known in Britain as bulrush, or reedmace,  United States as cattail, catninetail, punks, or corndog grass, in Australia as cumbungi or bulrush, in Canada as bulrush or cattail, and in New Zealand as raupo.

The rhizomes are edible. Evidence of preserved starch grains on grinding stones  suggests they were eaten in Europe 30,000 years ago