(Greene) N. H. Holmgren
Identity
Unique IDELEMENT_GLOBAL.2.155760
Element CodePDBRA060D0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single nation
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCapparales
FamilyBrassicaceae
GenusBoechera
SynonymsArabis davidsoniiGreene
Concept ReferenceKartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Taxonomic CommentsMulligan (1995, Arabis synopsis, Rhodora 97: 109-163) included Arabis davidsonii ( = Boechera davidsonii) in Arabis lyallii. However, Boechera davidsonii is easily distinguished from B.lyallii by the thick covering of persistent leaf bases on caudex branches, ascending fruits, and uniseriate seeds (Flora of North America Editorial Committee 2010). "Boechera davidsonii is nearly unique among western North American species of the genus in showing no evidence of hybridization with other species." (Flora of North America Editorial Committee 2010).
Conservation Status
Rank Method Rank calculation - Biotics v2
Review Date2024-07-31
Change Date2024-07-31
Edition Date2024-07-31
Edition AuthorsN. Ventrella (2024)
Threat ImpactUnknown
Range Extent20,000-200,000 square km (about 8000-80,000 square miles)
Number of Occurrences21 - 300
Rank ReasonsBoechera davidsonii is a perennial herb occurring in ledges and on rock outcrops in lodgepole pine forests, and subalpine and alpine forests of western North America from Oregon and California east to Nevada in the United States. There are 21-300 estimated occurrences of this species, which are potentially threatened by invasive species, drought, wildfire, and other threats in some places. However, Boechera davidsonii is likely buffered somewhat from direct anthropogenic threats due to its remote and largely inaccessible habitat.
Range Extent CommentsBoechera davidsonii occurs in western North America from Oregon and California east to Nevada in the United States (FNA 2010). Range extent was estimated to be over 160,000 square kilometers using herbarium specimens, NatureServe Network occurrence data, and photo-based observations documented between 1983 and 2024 (GBIF 2024, iNaturalist 2024, NatureServe 2024, SEINet 2024).
Occurrences CommentsBy applying a 1 km separation distance to herbarium records and photo-based observations documented between 1983 and 2024, there are estimated to be between 21 and 300 occurrences rangewide (GBIF 2024, iNaturalist 2024, SEINet 2024). This species is likely underrepresented in herbaria collections due to its remote and inaccessible habitat on rock ledges and cliffs.
Threat Impact CommentsAlthough threats are not widely documented, Boechera davidsonii is potentially threatened by invasive species, drought, wildfire, and other threats in some places. However, their overall impact is likely low, given the species' remote and largely inaccessible habitat of ledges and rock outcrops in lodgepole pine forests, and subalpine and alpine forests.