Osmunda cinnamomea, fronds 2 to 3 ft. long and 6 to 8 in. broad, a native of the U.S.A. And Canada.
O. claytoniana, fronds 1 ft. long and 8 to 12 in. broad, also a native of the U.S.A. And Canada.
O. regalis (royal or flowering fern), the most conspicuous of all native hardy ferns, attains majestic proportions. Easily cultivated in any moist place, such as the side of a lake, stream or artificial pool. Its fronds, a delicate pale green in spring, changing with the approach of autumn to light russet-brown, are of two kinds, the fertile, approximately 3 ft. long, and the barren, which are more numerous, about 5 ft. or more.