Scientific Name: Enemion biternatum
Other/Previous Names: Isopyrum biternatum
Taxonomy Group: Vascular Plants
COSEWIC Range: Ontario
COSEWIC Assessment Date and Status Change: May 2005
COSEWIC Status: Threatened
COSEWIC Status Criteria: Met criteria for Endangered, B1ab(iii)+2ab(iii), but designated Threatened because the populations appear stable and not at imminent risk of extirpation. Criteria met for Threatened: B1ab(iii)+2ab(iii); D2.
COSEWIC Reason for Designation: A delicate, spring-flowering, perennial herb restricted to a few fragmented riverside forest sites in southwestern Ontario where its populations are at risk from habitat loss and decline in quality due to a variety of activities including recreational trail use, and expansion of exotic invasive plants.
COSEWIC History of Status Designation: Designated Special Concern in April 1990. Status re-examined and designated Threatened in May 2005.
SARA Status: Schedule 1, Threatened
Date of Listing (yyyy-mm-dd): 2006-08-15
Please note that this information is provided for general information purposes only. For the most up to date and accurate list of species listed under the Species at Risk Act, please see the Justice Laws Website.
Image of False Rue-anemone
False rue-anemone is a spring-flowering herbaceous perennial. The flowers are small and delicate, with 5 white petal-like sepals, surrounding a cluster of stamens with yellow anthers. The species grows to about 40 cm tall. Although its roots are shallow and slender, they are tough and hardy - sometimes to the extent of maintaining green leaves all winter. The thin leaves are mostly divided into three segments, each of which may be divided into three leaflets that are usually olive green in colour. The white flowers of false rue-anemone are among the earliest to open in spring, starting in April and extending through to early June. (Updated 2017/05/24)
Distribution and Population
False rue-anemone occurs in Canada and the United States. This species is generally common throughout its main range but is quite rare at the northern and western edges of its range. In Canada, it occurs as scattered populations in southwestern Ontario. In the ten years since the last status report, one historical population of false rue-anemone has been relocated. No new populations have been discovered. Six populations are currently extant with about one million flowering shoots.(Updated 2017/05/24)
This species inhabits open wooded slopes, river floodplains, rich woods and thickets. (Updated 2017/05/24)
In Canada, false rue-anemone flowers from April to early June, and bears fruit from May to June. Insects are the main pollinators. The seeds germinate in the autumn. (Updated 2017/05/24)
In Canada, several populations of false rue-anemone are threatened by all terrain vehicle use, soil compaction, and trampling, due to their proximity to public areas and trails. Loss of habitat due to invasion of exotic grasses and other invasive plants, wood-cutting operations, soil erosion, and agricultural activities also pose a threat to Canadian populations of false rue-anemone. Spraying of herbicides and pesticides is also occurring to the detriment of these plants. Road salting may be a limiting factor for at least one Canadian population of false rue-anemone. (Updated 2017/05/24)
The False Rue-anemone is protected under the federal Species at Risk Act (SARA). More information about SARA, including how it protects individual species, is available in the Species at Risk Act: A Guide.
Provincial and Territorial Protection
Status of Recovery Planning
Recovery Strategies :
Name Recovery Strategy for the False Rue-anemone (Enemion biternatum) in Canada
Status Final posting on SAR registry
Carolinian Woodland Plants Recovery Team
Jarmo Jalava - Chair/Contact - Other
Phone: 705-760-2823 Send Email
PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.
8 record(s) found.
- COSEWIC Status Reports (1 record(s) found.)
- Response Statements (1 record(s) found.)
- Recovery Strategies (1 record(s) found.)
- Orders (2 record(s) found.)
- COSEWIC Annual Reports (1 record(s) found.)
- Consultation Documents (1 record(s) found.)
- Recovery Document Posting Plans (1 record(s) found.)
COSEWIC Status Reports
Response Statements - False Rue-anemone (2005-11-15)A delicate, spring-flowering, perennial herb restricted to a few fragmented riverside forest sites in southwestern Ontario where its populations are at risk from habitat loss and decline in quality due to a variety of activities including recreational trail use, and expansion of exotic invasive plants.
COSEWIC Annual Reports
COSEWIC Annual Report - 2005 (2005-08-12)2005 Annual Report to the Canadian Endangered Species Conservation Council (CESCC) from the Committee on the Status of Endangered Wildlife in Canada.