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NPIN: Native Plant Database

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Osmunda claytoniana (Interrupted fern)
Cressler, Alan

Osmunda claytoniana

Osmunda claytoniana L.

Interrupted Fern

Osmundaceae (Royal Fern Family)

Synonym(s):

USDA Symbol: OSCL2

USDA Native Status: L48 (N), CAN (N), SPM (N)

The fronds of interrupted fern occur in groups. Once-pinnate fertile fronds, which are slightly longer, have 2-5 pair of pinnae in the center of the frond which are twice-pinnate and utilized solely for spore bearing. Sterile fronds bend outward forming a vase-shaped circle enclosing the interrupted fronds. This fern can reach a height of 6 ft.

 

Plant Characteristics

Duration: Perennial
Habit: Herb , Fern
Leaf Retention: Evergreen
Leaf: Dark Green
Fruit:
Size Class: 3-6 ft.

Bloom Information

Bloom Color: Brown
Bloom Time: Jun
Bloom Notes: This is a non-flowering plant that reproduces by spores which are brown.

Distribution

USA: AL , AR , CT , DC , DE , GA , IA , IL , IN , KY , MA , MD , ME , MI , MN , MO , MS , NC , NH , NJ , NY , OH , PA , RI , SC , TN , VA , VT , WI , WV
Canada: NB , NL , NS , ON , PE
Native Distribution: Nf. to Man., s. to GA & LA
Native Habitat: Rich, wooded slopes; moist ledges

Growing Conditions

Water Use: High
Light Requirement: Shade
Soil Moisture: Moist
Soil pH: Acidic (pH<6.8)
CaCO3 Tolerance: Low
Soil Description: Moist to dry, acid to neutral soils.
Conditions Comments: Interrupted fern is easy to cultivate.

Propagation

Description: Propagate by spores or rhizome division.
Seed Collection: Not Available
Seed Treatment: Not Available
Commercially Avail: yes

Mr. Smarty Plants says

Possible ground covers under pine trees in Illinois
April 18, 2006
Have pine trees in front of house. No luck with the lawn around them....was told it's because of ground acidity. Any tips on how to get a lawn to grow there? If not, can you suggest some ground cover...
view the full question and answer

National Wetland Indicator Status

Region:AGCPAKAWCBEMPGPHIMWNCNEWMVE
Status: FAC FAC FAC FAC FAC
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

From the National Suppliers Directory

According to the inventory provided by Associate Suppliers, this plant is available at the following locations:

Amandas Garden - Springwater, NY
American Native Nursery - Quakertown, PA
Prairie Nursery - Westfield, WI

From the National Organizations Directory

According to the species list provided by Affiliate Organizations, this plant is on display at the following locations:

Mt. Cuba Center - Hockessin, DE

Additional resources

USDA: Find Osmunda claytoniana in USDA Plants
FNA: Find Osmunda claytoniana in the Flora of North America (if available)
Google: Search Google for Osmunda claytoniana

Metadata

Record Modified: 2014-10-22
Research By: TWC Staff

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