Home/Species/ Mosquin's Clarkia

Clarkia mosquinii

E. Small

Mosquin's Clarkia

G2Imperiled Found in 1 roadless area NatureServe Explorer →

G2ImperiledGlobal Rank

Very high - mediumThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.158713

Element CodePDONA050S0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderMyrtales

FamilyOnagraceae

GenusClarkia

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.

Taxonomic Comments

Although not maintained by Kartesz (1999), Clarkia mosquinii has often been treated (e.g., Kartesz, 1994) to include two subspecies: Clarkia mosquinii ssp. mosquinii and Clarkia mosquinii ssp. xerophylla. Chromosome count (n=6) for both. Test cross necessary for positive identification.

Conservation Status

Rank MethodLegacy Rank calculation - Excel v3.1x

Review Date2016-05-17

Change Date2009-05-07

Edition Date2016-05-17

Edition AuthorsGardner, P.A. (1989), rev. L. Morse (1995, 1999), rev. (L. Oliver 2003), rev. K. Gravuer (2009), rev. Bittman and Treher (2016)

Threat ImpactVery high - medium

Range Extent250-1000 square km (about 100-400 square miles)

Number of Occurrences21 - 80

Rank Reasons

Feared potentially extinct in the 1980s and known from only a few occurrences in the early 1990s, this species now has 67 presumed extant occurrences documented. Almost all known occurrences are in Butte County, California, with about 3 in adjacent Plumas County. Threatened by road maintenance, logging and off-road vehicle use.

Range Extent Comments

A California endemic predominantly in Butte County, with a few occurrences in Plumas County.

Occurrences Comments

Rediscovered in 1991 (ssp. mosquinii) and 1984 (ssp. xerophila). Now known from approximately 67 presumed extant occurrences in two counties of California.

Threat Impact Comments

Threatened by road widening; one historical site destroyed by flooding of Oroville Reservoir. Road work is still a threat, as well as logging activities, and off-road vehicle use for nearly all of the occurrences (CNDDB 2003). Additional threats are grazing and trampling by cattle, erosion caused by ORVs and changing water levels, and many sites are being shaded out by other species. The species requires some disturbance which help keep a reduced canopy.

Ecology & Habitat

Habitat

Cismontane woodland.

Terrestrial Habitats

Forest/WoodlandWoodland - Mixed

Other Nations (1)

United StatesN2

Province	Rank	Native
California	S2	Yes

Threat Assessments

Threat	Scope	Severity	Timing
2 - Agriculture & aquaculture	Small (1-10%)	Unknown	High (continuing)
4 - Transportation & service corridors	Large (31-70%)	Unknown	High (continuing)
5 - Biological resource use	Pervasive (71-100%)	Unknown	High (continuing)
5.3 - Logging & wood harvesting	Large (31-70%)	Unknown	High (continuing)
6 - Human intrusions & disturbance	Large (31-70%)	Unknown	High (continuing)
7 - Natural system modifications	Small (1-10%)	Unknown	High (continuing)
7.2 - Dams & water management/use	Small (1-10%)	Unknown	High (continuing)
8 - Invasive & other problematic species, genes & diseases	Large (31-70%)	Moderate - slight	High (continuing)

Plant Characteristics

DurationANNUAL

Economic Value (Genus)No

Roadless Areas (1)

California (1)

Area	Forest	Acres
Middle Fork	Plumas National Forest	29,278

References (4)

California Department of Fish and Game. 2000. Natural Diversity Database (RareFind 2), Version 2.1.2, January 25, 2000. Downloaded in 2003.
California Native Plant Society (CNPS). 2001. Inventory of Rare and Endangered Plants of California (sixth edition). Rare Plant Scientific Advisory Committee, David P. Tibor, Convening Editor. California Native Plant Society. Sacramento, CA. x + 388pp.
Flora of North America Editorial Committee (FNA). 2021. Flora of North America north of Mexico. Vol. 10. Magnoliophyta: Proteaceae to Elaeagnaceae. Oxford Univ. Press, New York. xxiv + 456 pp.
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.

Clarkia mosquinii

Habitat

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