Identity
Unique IDELEMENT_GLOBAL.2.154394
Element CodePDSCR1K0J0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderScrophulariales
FamilyOrobanchaceae
GenusPedicularis
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.
Conservation Status
Review Date2005-05-18
Change Date1999-09-14
Edition Date1999-08-18
Edition AuthorsVrilakas, Sue, rev. R. Bittman 5/2005
Threat ImpactLow
Range Extent250-5000 square km (about 100-2000 square miles)
Number of Occurrences81 to >300
Rank ReasonsAlthough this species is limited to two counties in Oregon and California, it has relatively large population sizes as well as total numbers, grows on various habitats, and appears to have a net favorable response to disturbance. Many of the known populations are protected in 2 different Special Interest Areas, a Research Natural Area, and 3 different Wilderness Areas.
Range Extent CommentsThe range of Howell's lousewort is limited to the Siskiyou Mts. of Siskiyou County, California and Josephine County, Oregon. Oregon populations are in the southern portion of the state with the majority within 2 miles of the CA/OR border.
Occurrences CommentsThere are a total of 98 reported occurrences but probably at least 100. Approximately 21 in Oregon, the rest in California. There could be more occurrences in CA as of May 2005; the file is 2" thick and is all location data.
Threat Impact CommentsWildlife (deer, squirrels, etc.) appear to eat the plants. Timber harvest activities may detrimentally affect plants but may also be advantageous to growth and dispersal. Most or all populations are grazed which may have detrimental effects on the plants' reporductive success.