Home/Species/ Burke's Goldfields

Lasthenia burkei

(Greene) Greene

Burke's Goldfields

G1Critically Imperiled Found in 7 roadless areas NatureServe Explorer →

G1Critically ImperiledGlobal Rank

Very high - highThreat Impact

Identity

Unique IDELEMENT_GLOBAL.2.141666

Element CodePDAST5L010

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicendemic to a single state or province

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderAsterales

FamilyAsteraceae

GenusLasthenia

Other Common Names

Burke's baeria (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.

Taxonomic Comments

A study is ongoing at OSU (Columbus) to determine Lasthenia burkei's origin; it may be a stabilized hybrid between L. fremontii and L. conjugens (Bittman 1998).

Conservation Status

Review Date2015-08-10

Change Date1989-04-28

Edition Date2005-11-15

Edition AuthorsD. Gries, rev. R. Bittman (7/98), rev. R. Bittman 2005

Threat ImpactVery high - high

Range Extent<100-250 square km (less than about 40-100 square miles)

Number of Occurrences6 - 80

Rank Reasons

Endemic to California, Lasthenia burkei is likely known from fewer than ten viable occurrences in Lake, Mendocino, and Sonoma Counties. Its status is declining rapidly (it could easily be extinct by 2025) due to runaway urban development in its wetland habitat. Other threats are agriculture and grazing. All remaining populations of any size and quality should be protected.

Range Extent Comments

California endemic, known from the Cotati Valley of Sonoma County, and from Lake and Mendocino Counties. Range extent is estimated at about 1900 sq mi, though there are large gaps in the distribution.

Occurrences Comments

Known from twenty-eight occurrences. A maximum of twenty occurrences may be extant, but we believe the number to be far lower (fewer than ten viable occurrences) (California Natural Diversity Database, May/1998 report).

Threat Impact Comments

Development, agriculture (especially vineyards), weeds, altered hydrology, ORVs and grazing. This plant could easily be extinct by 2025 (Bittman 1998).

Ecology & Habitat

Habitat

Meadows (mesic), vernal pools (Skinner, 1997).

Terrestrial Habitats

Grassland/herbaceous

Palustrine Habitats

TEMPORARY POOL

Other Nations (1)

United StatesN1

Province	Rank	Native
California	S1	Yes

Threat Assessments

Threat	Scope	Severity	Timing
1 - Residential & commercial development	Pervasive - large	Extreme - serious	High - moderate
1.1 - Housing & urban areas	Pervasive - restricted	Extreme - serious	High - moderate
2 - Agriculture & aquaculture	Pervasive - large	Extreme - serious	High - moderate
2.1 - Annual & perennial non-timber crops	Pervasive - large	Extreme - serious	High - moderate
2.3 - Livestock farming & ranching	Pervasive - large	Extreme - serious	High - moderate
6 - Human intrusions & disturbance	Pervasive - large	Extreme - serious	High (continuing)
6.1 - Recreational activities	Pervasive - large	Extreme - serious	High (continuing)
7 - Natural system modifications	Pervasive - large	Extreme - serious	High - moderate
7.2 - Dams & water management/use	Pervasive - large	Extreme - serious	High - moderate
8 - Invasive & other problematic species, genes & diseases	Pervasive - large	Extreme - serious	High (continuing)
8.1 - Invasive non-native/alien species/diseases	Pervasive - large	Extreme - serious	High (continuing)

Plant Characteristics

Economic Value (Genus)No

Roadless Areas (7)

California (7)

Area	Forest	Acres
Big Butte Shinbone	Mendocino National Forest	4,265
Black Butte	Mendocino National Forest	15,461
Elk Creek	Mendocino National Forest	23,182
Reister Canyon	Mendocino National Forest	5,897
Snow Mountain	Mendocino National Forest	14,457
Thatcher	Mendocino National Forest	16,652
Wilderness Contiguous	Mendocino National Forest	3,606

References (4)

Bittman, R. 1998. Lead Botanist, California Natural Diversity Database. Unpublished notes on fifty rare plants of California for purposes of updating Element Global Ranking (EGR) forms. California Natural Heritage Division, Dep. of Fish & Game, Sacramento, California, U.S.A.
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.
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.
U.S. Fish and Wildlife Service (USFWS). 1991. Determination of Endangered Status for Three Plants, Blennosperma bakeri (Sonoma Sunshine or Baker's Stickyseed), Lasthenia burkei (Burke's Goldfields), and Limnanthes vinculans (Sebastopol Meadowfoam). Federal Register 56 (231), 61173-82.

Lasthenia burkei

Habitat

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