This huge plant grows at the base of a small hillside in my garden. Normally grown in bogs or the edge of ponds but this does just fine here as long as I keep its roots nice & moist. The spikes are the 'flowers' & are covered with tiny reddish-green florets which are the seeds. The spikes in this picture measure from 2.5' to about 4' long & the leaves are about 7-8' tall & 5' across. We have had this amazing plant in our garden for the past 5 years & this is the first time I've found seedlings, which I'm nurturing in my greenhouse.
A link to more info about the plant & a close up of a 'flower' spike