Osmundaceae - royal fern family
Species that grow without cultivation on Mount Desert Island

compiled by the
Champlain Project - P. O. Box 55 - Bass Harbor, Maine  04653

(updated 9 August 2018)

Osmundaceae - sensitive fern family
[information to be added]

Mount Desert Island is home to 3 species in 2 genera. Click on a link below or scroll down for more information.
   Osmunda (2 species)
      Osmunda claytoniana - interrupted fern (common1)
      Osmunda regalis - royal fern (occasional)
   Osmundastrum (1 species)
      Osmundastrum cinnamomeum - cinnamon fern (common)

fertile portion
Osmunda on same leaf (frond) as sterile/photosynthetic portion
Osmundastrum on separate leaf (frond) from sterile/photosynthetic leaves (fronds)

Osmunda ([?] fern)
[information to be added]

location of fertile portion
Osmunda claytoniana in the middle of a leaf (frond), between sterile/photosynthetic portions
Osmunda regalis at tip of leaf (frond)

Osmunda claytoniana (interrupted fern) - [information to be added]

(click on image to enlarge)

Osmunda regalis (royal fern) - [information to be added]
(click on an image to enlarge)

Osmundastrum ([?] fern)
[information to be added]

Osmundastrum cinnamomeum (cinnamon fern) - [information to be added]

(click on image to enlarge)

   1Frequency designations are from the book The Plants of Acadia National Park by Glen H. Mittelhauser, Linda L. Gregory, Sally C. Rooney, and Jill E. Weber (2010, University of Maine Press, ISBN 978-0-89101-120-0).