Osmunda regalis L. - Royal Fern


 

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Osmunda regalis - (image 1 of 4)

 

Taxonomy

Family: Osmundaceae

Habitat

Moist, acid places. Can be abundant in swampy woods.

Associates

 

 Distribution

Circumboreal. In America from Newfoundland to Saskatchewan, south to FL, TX, and into the tropics.

Morphology

Perennial to nearly 2 m high. Leaves bipinnate; petioles glabrous; pinnae 5-7 pairs, subopposite; sterile pinnules alternate, serrulate, 7-10 to a side, sessile; fertile part of blade terminal, greenish turning brown.

Notes

Spores late May to July.

Wetland indicator: Obligate

American plants are var. spectabilis (Willd.) A. Gray.

 

References

Gleason, Henry A. and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States and Adjacent Canada. Second Ed.

The New York Botanical Garden. Bronx, NY

 

Swink, F. and G. Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois.
 


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 Michael Hough 2005