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Home/Species/ Cooke's Phacelia

Phacelia cookei

Constance & Heckard

Cooke's Phacelia

G1Critically Imperiled Found in 1 roadless area NatureServe Explorer →
G1Critically ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.146189
Element CodePDHYD0C0Y0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderSolanales
FamilyHydrophyllaceae
GenusPhacelia
Other Common Names
Cooke's phacelia (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 MethodLegacy Rank calculation - Excel v3.1x
Review Date2016-05-12
Change Date1989-04-28
Edition Date2016-05-12
Edition AuthorsD. Gries, rev. R. Bittman (2005), rev. A. Treher and Bittman (2016)
Threat ImpactHigh
Range Extent<100 square km (less than about 40 square miles)
Number of Occurrences1 - 20
Rank Reasons
Endemic to California, Phacelia cookei is known from perhaps 4 (maybe 6) extant occurrences in Siskiyou County. Most or all are located just north of Mt. Shasta on sandy volcanics. Most occur on USFS lands. Threats include non-native plants, road maintenance and possibly fire suppression.
Range Extent Comments
Phacelia occurs in an extremely limited area in Siskiyou County, California just north of Mt. Shasta.
Occurrences Comments
In California, there are 6 occurrences known but two are historic.
Threat Impact Comments
Threats include road maintenance or widening, non-native and shrubby native plant competitors and herbicide use.
Ecology & Habitat

Habitat

Open areas, including disturbed roadsides, seedling conifer plantations, and recently burned sites, on loose volcanic sand. Found within Great Basin (Sagebrush) Scrub and Yellow Pine Forest communities, often with a scattered ponderosa pine-juniper overstory. Associated species include Artemisia tridentata, Purshia tridentata, and Chrysothamnus sp. at lower elevations and Ceanothus velutinus and Arctostaphylos sp. at higher elevations. 1095 - 1700 m.
Terrestrial Habitats
Forest/WoodlandForest - ConiferForest EdgeWoodland - ConiferShrubland/chaparral
Other Nations (1)
United StatesN1
ProvinceRankNative
CaliforniaS1Yes
Threat Assessments
ThreatScopeSeverityTiming
4 - Transportation & service corridors———
4.1 - Roads & railroads———
8 - Invasive & other problematic species, genes & diseases———
8.1 - Invasive non-native/alien species/diseases———
8.2 - Problematic native species/diseases———
9 - Pollution———
9.5 - Air-borne pollutants———

—

Plant Characteristics
DurationANNUAL
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
Mt. Shasta BShasta-Trinity National Forest2,809
References (6)
  1. CalFlora. 2005. Information on California plants for education, research and conservation. Berkeley, California: The CalFlora Database [web application]. Available: http://www.calflora.org/. (Accessed 2005)
  2. 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.
  3. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  4. 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.
  5. Nakamura, G., and J. K. Nelson, eds. 2001. Illustrated field guide to selected rare plants of northern California. University of California Agriculture and Natural Resources publication 3395, Oakland, CA. 370 pp.
  6. 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.