Common Name: Interrupted
This annual fern is named for its brown fertile leaflets which interrupt
the larger green sterile leaflets on larger fronds.
Leaves: There are a combination of two leaflets on each frond. There are small brown fertile leaflets and larger green sterile leaflets. The larger green leaflets have distinctive rounded edges.
Seeds: They are spores located on brown fertile leaflets
Stem: The petioles are covered in wooly hairs which decrease with age.
Branching Pattern: symmetric clump
Height: Fronds can be 2-4 feet long
Conditions/Habitat/Kind of Forest: It can grown in semi shade to no shade, but it must have moist soil. It is found in woods, roadsides, swamps and low prairies.
Known Wildlife Interactions: Pollinated by insects
Range: North America, Newfoundland south to Florida. Naturalized in Ireland. Also found in east Asia
Conservation Status-US/ World Wide: Not threatened in U.S. or globally.
Uses (Human): No known usage.
Connecticut Wildflowers. January 20, 2006. Connecticut Botanical Society. Accessed: January 20, 2006. <http://www.ct-botanical-society.org/galleries/polygonumsagi.html>
Plants for a Future. June 2004. Accessed: January 20, 2006. <http://www.pfaf.org/database/plants.php?Polygonum+sagittatum>
The Pennsylvania Flora Project. Botany Department, Morris Arboretum of the University of Pennsylvania. Accessed: January 20, 2006. <http://www.paflora.org>
Chadde, Steve W. A Great Lakes Wetland Flora. Pocketflora Press. 2002. pg.67
IUCN Red List of Threatened Species <http://www.iucnredlist.org>
This page was created by: A Coiro,
Photos by: L. Rosenberg, edited by N. Smith
Last updated 04/25/06