Identity
Unique IDELEMENT_GLOBAL.2.961988
Element CodePDBRA0K1N0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCapparales
FamilyBrassicaceae
GenusCardamine
Concept ReferenceFlora of North America Editorial Committee (FNA). 2010. Flora of North America north of Mexico. Vol. 7. Magnoliophyta: Salicaceae to Brassicaceae. Oxford University Press, New York. xxii + 797 pp.
Taxonomic CommentsCardamine holmgrenii was described in 2007 from an herbarium specimen misidentified as Cardamine bellidifolia, an unrelated circumpolar species (Al-Shehbaz 2007). The two species have substantial morphological differences. The Flora of the Pacific Northwest (2018) treats C. holmgrenii as a "depauperate, weakly rhizomatous" form of C. pennsylvanica.
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2020-12-03
Change Date2016-04-11
Edition Date2020-12-03
Edition AuthorsA. Tomaino (2016), rev. A. Frances and A. Papke (2020)
Threat ImpactHigh - low
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences1 - 5
Rank ReasonsCardamine holmgrenii is a perennial herb known from two occurrences in the Blue Mountains of Oregon in the United States. It occurs in high alpine, boggy prairies. Cardamine holmgrenii was described as a new species in 2007 from a specimen collected in 1946. In 2017, three populations were relocated near Anthony Lake, presumably close to where the type specimen was collected, in the Wallowa-Whitman National Forest. In 2017, a second occurrence was discovered in Kelly Prairie, in the Umatilla National Forest about 85 kilometers from Anthony Lake. No specific information on threats has been recorded; however, Cardamine holmgrenii occurs in areas that are not designated as wilderness. The location in the Wallowa-Whitman National Forest appears to have been previously logged.
Range Extent CommentsCardamine holmgrenii occurs in the Blue Mountains of Oregon in the United States. It is known from Baker County, near Anthony Lake in the Wallowa-Whitman National Forest and from another location in Morrow County in the Umatilla National Forest about 85 km away (Duncan Thomas, pers. comm., December 2020).
Occurrences CommentsThis species is known from two occurrences.
Threat Impact CommentsCardamine holmgrenii occurs in Wallowa-Whitman National Forest, about 5 km north of Anthony Lake Campground. No specific information on threats has been recorded; however, it occurs in a part of the Forest that is not protected as wilderness and appears to have been previously logged. Cardamine holmgrenii also occurs in Umatilla National Forest in Kelly Prairie. Threats from this location have not been documented.