Polygonum bidwelliae

S. Wats.

Bidwell Knotweed

G4Apparently Secure Found in 2 roadless areas NatureServe Explorer →
G4Apparently SecureGlobal Rank
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.134610
Element CodePDPGN0L0C0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderPolygonales
FamilyPolygonaceae
GenusPolygonum
Concept Reference
Kartesz, 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
Rank MethodLegacy Rank calculation - Excel v3.1x
Review Date2014-12-01
Change Date2016-05-20
Edition Date2014-12-01
Edition AuthorsBittman, R.
Threat ImpactMedium
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences81 - 300
Ecology & Habitat
Other Nations (1)
United StatesN4
ProvinceRankNative
CaliforniaS4Yes
Plant Characteristics
Economic Value (Genus)No
Roadless Areas (2)
California (2)
AreaForestAcres
IshiLassen National Forest21,805
Polk SpringsLassen National Forest9,466
References (3)
  1. Flora of North America Editorial Committee (FNA). 2005. Flora of North America north of Mexico. Vol. 5. Magnoliophyta: Caryophyllidae: Caryophyllales, Polygonales, and Plumbaginales. Oxford Univ. Press, New York. vii + 656 pp.
  2. Kartesz, 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.
  3. Munz, P.A., with D.D. Keck. 1959. A California flora. Univ. California Press, Berkeley. 1681 pp.