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Limnanthes floccosa ssp. californica

Arroyo

Shippee Meadowfoam

T1T1 (G4T1) Found in 1 roadless area NatureServe Explorer →
T1T1Global Rank
Very highThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.130789
Element CodePDLIM02042
Record TypeSPECIES
ClassificationSubspecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderGeraniales
FamilyLimnanthaceae
GenusLimnanthes
Other Common Names
Butte County Meadowfoam (EN) California Meadowfoam (EN) California meadowfoam (EN)
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 Method Rank calculation - Biotics v2
Review Date2022-03-17
Change Date1988-07-12
Edition Date2022-03-17
Edition AuthorsGRIES, D. (1998), rev. Treher (2022)
Threat ImpactVery high
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences21 - 80
Rank Reasons
Endemic to California, Limnanthes floccosa ssp. californica is an annual herb known from 21 occurrences in Butte County. Many of the occurrences are on private land and are threatened by urbanization, but other threats include agricultural land conversion, road construction, grazing, non-native plants, and vehicle activity.
Range Extent Comments
Limnanthes floccosa ssp. californica is endemic to California where it known only from Butte County, along the eastern side of the Sacramento Valley (CNDDB 2022, USFWS 2008, Skinner 1997).
Occurrences Comments
This taxon is known from 21 occurrences (CNDDB 2022, USFWS 2008).
Threat Impact Comments
This taxon is threatened by past and continued fragmentation of it's habitat. It is threatened by urbanization, road construction, grazing, non-native plants, vehicles, and agriculture (Skinner 1997). Almost 90% of the remaining populations of L. floccosa ssp. californica occur entirely or largely on private land and are subject to urban development, ag-land conversion, and highway widening or realignment (USFWS 1992).
Ecology & Habitat

Habitat

This species occurs in valley and foothill grasslands on mesic soils at elevations of 35 to 1,167 m (CNDDB 2021, USFWS 2008, Skinner 1997). It is associates with Limnanthes alba ssp. alba, L. douglasii var. rosea, and L. floccosa ssp. floccosa. It grows in three types of seasonal wetlands: ephemeral drainages, vernal pool depressions in ephemeral drainages, and occasionally around the edges of isolated vernal pools (USFWS 1992, 2008).
Terrestrial Habitats
Grassland/herbaceous
Palustrine Habitats
TEMPORARY POOL
Other Nations (1)
United StatesN1
ProvinceRankNative
CaliforniaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial developmentLarge (31-70%)Extreme - seriousHigh (continuing)
2 - Agriculture & aquacultureLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)
2.1 - Annual & perennial non-timber cropsUnknownUnknownUnknown
2.3 - Livestock farming & ranchingLarge (31-70%)UnknownHigh (continuing)
2.3.4 - Scale unknown/unrecordedLarge (31-70%)UnknownHigh (continuing)
4 - Transportation & service corridorsLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)
4.1 - Roads & railroadsLarge (31-70%)Moderate or 11-30% pop. declineHigh (continuing)
6 - Human intrusions & disturbanceUnknownUnknownHigh (continuing)
6.1 - Recreational activitiesUnknownUnknownHigh (continuing)
8 - Invasive & other problematic species, genes & diseasesLarge - restrictedModerate or 11-30% pop. declineHigh (continuing)
8.1 - Invasive non-native/alien species/diseasesLarge - restrictedModerate or 11-30% pop. declineHigh (continuing)

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Plant Characteristics
DurationANNUAL
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
IshiLassen National Forest21,805
References (6)
  1. California Natural Diversity Database (CNDDB). 2022. RareFind Version 5.2.14. California Department of Fish and Game, Sacramento.
  2. Flora 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.
  3. 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.
  4. Skinner, M.W., and B.M. Pavlik, eds. 1997 (1994). Inventory of rare and endangered vascular plants of California. 1997 Electronic Inventory Update of 1994 5th edition, California Native Plant Society, Special Publication No. 1, Sacramento.
  5. U.S. Fish and Wildlife Service (USFWS). 1992. Determination of endangered status for the plant <i>Limnanthes floccosa</i> ssp. <i>californica </i>(Butte County meadowfoam). Federal Register
  6. U.S. Fish and Wildlife Service (USFWS). 2008. <i>Limnanthes floccosa</i> ssp. <i>californica</i> (Butte County Meadowfoam) 5-Year Review: Summary and Evaluation. U.S. Fish and Wildlife Service, Sacramento Fish and Wildlife Office Sacramento, California.