Aptly named, Royal Fern is one of the most majestic ferns of the wetlands, thriving in swamps, bogs, and along shaded stream banks. It forms large, impressive, vase-shaped clumps of broad, bright green fronds that have a bold, almost tropical appearance. Unlike many finely-cut ferns, its large, twice-divided leaflets give it a unique and handsome texture.

Its most regal and unmistakable feature appears in late spring. Specialized fertile fronds rise from the center, their tips developing into dense, bead-like clusters of brown spore cases. These rusty-brown tassels stand erect like a crown, earning it the common nickname "flowering fern," despite producing no true flowers.

In autumn, the lush foliage turns a striking golden-yellow to russet brown. Its thick, fibrous root clumps help stabilize wet soils and provide shelter for amphibians, making it a true king of the swamp.