Central Iowans can take an active role today in restoring the disappearing prairieland that once covered the state. Polk County is hosting an event for groups, families and individuals to gather seeds from native prairie grasses and wildflowers.Kami Rankin is spokeswoman for the Polk County Conservation Board. She says it’s a great educational tool for people to learn about the prairie.Rankin says 200 years ago, Iowa was about 99-percent prairie. Now, native prairies comprise less than one-percent of Iowa.Interested seed harvesters are to gather at the Chichaqua Sand Hill prairie, about a half-hour northeast of Des Moines. For directions, call (515) 323-5363.