The 10-year turnaround; rapidly renewable resources

[Coffeefiend]

Morning everyone,
I'm trying to achieve LEED credit MR-6: Rapidly renewable resources (defined as materials that can be regrown, harvested and made usable in 10 years or less). The following materials are given as examples:
- Bamboo flooring
- cotton batt. insulation
- linolium flooring
- sunflower seed board panels
- wheatboard cabinetry
- wool carpeting
- cork flooring

Does anyone else have any other ideas for rapidly renewable resources, or any links to websites that could help? I want to achevie this credit for a project I'm working on, but I need to spend almost $350K of the budget on these mats and it's going to be hard to make it work.
Thanks!
details: http://www.usgbc.org/ShowFile.aspx?DocumentID=1095 , pg.55