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Osmunda claytoniana

Osmunda claytoniana L.

 

Interrupted Fern

KingdomPlantaePlants, but not fungi, lichens, or algae
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionPteridophytaFerns
ClassFilicopsida“Leptosporangiate” (has to do with how their spores form) ferns—includes most ferns
OrderPolypodialesPolypod ferns
FamilyOsmundaceae
GenusOsmunda
Speciesclaytoniana

About plant names...

Interrupted? How can a fern be interrupted? The answer seems a little silly to me: brown fertile leaflets “interrupt” the green sterile leaflets on larger fronds. These ferns are natives of eastern Asia and North America.

Identification: Fern fronds are up to 35" (90 cm) long and 8" (20 cm) wide. Spore-bearing leaflets are brown, appearing in the middle of the sterile green fronds, the most obvious identifying characteristic. The leaf stalk has a round cross-section.

Osmunda claytoniana (Interrupted Fern)

Interrupted fern, Osmunda claytoniana, in Lac-Mégantic, Quebec, by Circeus, 7/30/2005.

Online References:

Osmunda claytoniana on Earl J.S. Rook's Flora, Fauna, Earth, and Sky ... The Natural History of the Northwoods

Osmunda claytoniana on the Connecticut Botanical Society's Connecticut wildflowers site

Osmunda claytoniana on kgNaturePhotography.com

Osmunda claytoniana on the Hardy Fern Library

Osmunda claytoniana on Wikipedia

References:

Cobb, Boughton, Farnsworth, Elizabeth & Lowe, Cheryl, Peterson Field Guides: A Field Guide to Ferns and Their Related Families of Northwestern and Central North America, Houghton Mifflin Company, 2005, p. 174

Osmunda claytoniana (Interrupted Fern)

5/11/2013 · Townsend Wildlife Management Area, Townsend, MA
≈ 7 × 9" (17 × 23 cm)

Osmunda claytoniana (Interrupted Fern)

5/31/2010 · Mt. Lebanon St., Pepperell, MA
≈ 31 × 39" (78 × 100 cm)

Osmunda claytoniana (Interrupted Fern)

5/13/2012 · Lowell-Dracut-Tyngsboro State Forest, Lowell, MA
≈ 14 × 21" (34 × 52 cm)

Osmunda claytoniana (Interrupted Fern)

5/11/2013 · Townsend Wildlife Management Area, Townsend, MA
≈ 9 × 12" (24 × 30 cm)

Osmunda claytoniana (Interrupted Fern)

5/14/2013 · Beaver Brook Assn Conservation Lands, Rte. 130, Hollis, NH
≈ 4½ × 7" (12 × 18 cm)

Osmunda claytoniana (Interrupted Fern)

5/18/2012 · Mine Falls Park, Nashua, NH
≈ 8 × 12" (20 × 31 cm)

Osmunda claytoniana (Interrupted Fern)

5/15/2010 · Garden in the Woods, Framingham, MA
≈ 21 × 14" (52 × 34 cm)

Osmunda claytoniana (Interrupted Fern)

6/9/2016 · Monhegan Island, ME

Osmunda claytoniana (Interrupted Fern)

9/20/2009 · Wild Gardens of Acadia, Acadia National Park, Bar Harbor, ME
≈ 15 × 10" (39 × 26 cm)

Osmunda claytoniana description by Thomas H. Kent, last updated 17 Jun 2016.

© FloraFinder.org. All rights reserved.


 

Osmunda claytoniana (Interrupted Fern)

Once the spore-bearing fertile portions are no longer needed, they wither and disappear, leaving the “interruption.” · 6/17/2016 · Blue Trail, Willard Brook State Park, Ashby, MA

Osmunda claytoniana (Interrupted Fern)

5/14/2013 · Beaver Brook Assn Conservation Lands, Rte. 130, Hollis, NH
≈ 19 × 23" (47 × 57 cm)

Osmunda claytoniana (Interrupted Fern)

9/20/2009 · Wild Gardens of Acadia, Acadia National Park, Bar Harbor, ME
≈ 21 × 31" (52 × 78 cm)

Osmunda claytoniana (Interrupted Fern)

9/20/2009 · Wild Gardens of Acadia, Acadia National Park, Bar Harbor, ME
≈ 21 × 14" (52 × 34 cm)

Osmunda claytoniana (Interrupted Fern)

5/13/2012 · Lowell-Dracut-Tyngsboro State Forest, Lowell, MA
≈ 9 × 14" (23 × 35 cm)

Osmunda claytoniana (Interrupted Fern)

5/14/2013 · Beaver Brook Assn Conservation Lands, Rte. 130, Hollis, NH
≈ 6 × 9" (16 × 23 cm)

Osmunda claytoniana (Interrupted Fern)

6/9/2016 · Monhegan Island, ME

Osmunda claytoniana (Interrupted Fern)

5/15/2010 · Garden in the Woods, Framingham, MA
≈ 24 × 16" (62 × 41 cm)

Osmunda claytoniana (Interrupted Fern)

6/9/2016 · Monhegan Island, ME

Osmunda claytoniana (Interrupted Fern)

6/9/2016 · Monhegan Island, ME

Osmunda claytoniana (Interrupted Fern)

5/13/2012 · Lowell-Dracut-Tyngsboro State Forest, Lowell, MA
≈ 12 × 17" (29 × 44 cm)

Osmunda claytoniana (Interrupted Fern)

5/13/2012 · Lowell-Dracut-Tyngsboro State Forest, Lowell, MA
≈ 9 × 12" (23 × 29 cm)

Osmunda claytoniana (Interrupted Fern)

6/9/2016 · Monhegan Island, ME

Range: Zones 3-8:

About this map...