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Contact information
For information on Wisconsin's rare plants, contact:
Kevin Doyle
608-267-9788

Oregon Woodsia (Woodsia oregana ssp. cathcartiana)

Life history

Species overview

Oregon Woodsia (Woodsia oregana ssp. cathcartiana), a Wisconsin Special Concern plant, is found on moist, shaded (occasionally exposed) basaltic or, less commonly, dolomite cliffs. The optimal identification period for this species is late May through late September.

Synonyms: Woodsia cathcartiana, Woodsia oregana f. cathcartiana, Woodsia oregana f. glandulosa, Woodsia oregana var. cathcartiana, Woodsia pusilla var. cathcartiana

Identification

  • Distinguishing characteristics: Stipes dark brown or dark reddish-brown at and above the base.
  • Flower characteristics:
  • Fruit characteristics: Sori borne on the veins, rotund but with an elongated receptacle.
  • Leaf characteristics: Leaf blade lanceolate, 1 to 5 cm wide, acuminate, slightly narrowed below; leaflets (subbipinnate or subtripinnate) smooth or glandular, but without long hairs, 7 to 17 pairs; petiole dark brown toward the scaly base.

Phenology

  • Blooming phenology:
  • Fruiting phenology: mid summer
  • Optimum time to identify: late May through late September

Other

  • Growth form: Fern
  • Vegetative reproduction: Rhizomatous
  • Life cycle: Perennial
  • Comments: Associated Species: Pinus strobus, Tsuga canadensis, Polypodium vulgare, Dryopteris fragrans.

State status

Status and Natural Heritage Inventory documented occurrences in Wisconsin

The table below provides information about the protected status - state and federal - and the rank (S and G Ranks) for Oregon Woodsia (Woodsia oregana ssp. cathcartiana). See the Working List Key for more information about abbreviations. Counties shaded blue have documented occurrences for this species in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where this species has been found to date and is not meant as a range map.

Documented locations of Woodsia oregana ssp. cathcartiana in the Natural Heritage Inventory Database as of July 2015.


Summary Information
State StatusSC
Federal Status in Wisconsinnone
State RankS1
Global RankG5T5
Tracked by NHIY

Habitats and landscapes

The Natural Heritage Inventory has developed scores indicating the degree to which each of Wisconsin's rare plant species is associated with a particular natural community or ecological landscape. This information is similar to that found in the Wildlife Action Plan for animals. As this is a work in progress, we welcome your suggestions and feedback.

General habitat information

  • Habitat description: Found on moist, shaded (occasionally exposed) basaltic or, less commonly, dolomite cliffs.
  • Soils: Rocky soils.

Natural communities

This table lists the natural communities that are associated with Oregon Woodsia. Scores for natural community associations are: "significant" association (score=3), "moderate association" (score=2) or the species can be present but is only weakly associated with the community (score=1).

Natural communities score
Moist Cliff 3

Ecological landscapes

This table lists the ecological landscape association scores for Oregon Woodsia. The scores (3=High, 2=Moderate, 1=Low, 0=None) also correspond to the map.

Map of the Ecological Landscapes of Wisconsin.

Species guidance

The Endangered Resources Program has developed avoidance measures and management guidelines for plants on the Natural Heritage Working List. These are a work in progress, and we welcome your suggestions and feedback. Sources used in developing this information can be found here.

Avoidance measures

These are specific actions designed to avoid "take" (mortality) of this species.

  • Avoid known individual plant locations and conduct operations elsewhere when they are least likely to cause damage. Ideally, this would involve frozen, snow-covered ground. However, in areas of the state where frozen conditions are unreliable, very dry soils late in the growing season might be the best available alternative. Consult with a biologist, if needed.
  • Avoid broadcast spraying of herbicides; use care with spot spraying.
  • Avoid direct disturbance to sensitive microsites such as seeps, cliffs, and moss-covered boulders.

Management guidance

Management guidelines are additional considerations that may help maintain or enhance habitat for this species

  • Buffer management around unique microhabitats such as ephemeral ponds, seeps, etc.
  • Follow BMPs, especially around streams and use care near ravines, steep slopes, cliffs, rock outcrops, etc.

Photos


Oregon Woodsia  Photo.

Specimen scanned by the Wisconsin Herbarium, Madison, WI.

Scanned specimen courtesy of Wisconsin Herbarium

Oregon Woodsia  Photo.

Specimen scanned by the Wisconsin Herbarium, Madison, WI.

Scanned specimen courtesy of Wisconsin Herbarium

Oregon Woodsia  Photo.

Specimen scanned by the Wisconsin Herbarium, Madison, WI.

Scanned specimen courtesy of Wisconsin Herbarium

Oregon Woodsia  Photo.

Scanned specimen courtesy of Wisconsin Herbarium

Oregon Woodsia  Photo.

Scanned specimen courtesy of Wisconsin Herbarium


Support for Wisconsin's rare plant information has been provided by the Division of Forestry, the Endangered Resources Fund and the Wisconsin Rare Plant Preservation Fund. To donate, visit the Natural Resources Foundation of Wisconsin [exit DNR].

Last revised: Tuesday, November 28, 2017
Southwest Savanna Southern Lake Michigan Coastal Western Coulees and Ridges Southeast Glacial Plains Central Sand Hills Central Lake Michigan Coastal Central Sand Plains Northern Lake Michigan Coastal Northern Lake Michigan Coastal Northeast Sands Western Prairie North Central Forest Northern Highlands Northwest Lowlands Northwest Sands Northwest Lowlands Superior Coastal Plains Forest Transition