Roadless Areas
Home/Species/ Scott Valley Phacelia

Phacelia greenei

J.T. Howell

Scott Valley Phacelia

G2Imperiled Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.145695
Element CodePDHYD0C1V0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderSolanales
FamilyHydrophyllaceae
GenusPhacelia
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 Date2013-04-02
Change Date1987-08-06
Edition Date2013-02-15
Edition AuthorsD. Gries, rev. A. Treher & A. Kim (2013)
Threat ImpactHigh
Range Extent250-1000 square km (about 100-400 square miles)
Number of Occurrences21 - 80
Rank Reasons
Endemic to California, Phacelia greenei is known from Siskiyou and Trinity Counties. Threats include mining, grazing, and road maintanence.
Range Extent Comments
California endemic that occurs in the vicinity of Scott's Valley in Siskiyou and Trinity counties (CNPS 2013). Area of the minimum convex polygon, range extent, is 989 sq km.
Occurrences Comments
28 EOs (17 last surveyed before 1993 and 11 surveyed after 1993) (CNDDB 2013).
Threat Impact Comments
Threats include mining, grazing by cattle and horses, trampling by cattle, road maintenance and traffic, and potentially logging activities in the future. It was noted that in 1996 that land where 2 EOs occur were proposed for sale to a private owner by the BLM. Past threats include mining, water line projects, and logging.
Ecology & Habitat

Habitat

Gravelly serpentine ridges and slopes within coniferous forest communities (Subalpine Forest, Montane Coniferous Forest, Yellow Pine Forest, Closed-cone Coniferous Forest). 760 - 2440 m.
Terrestrial Habitats
Forest/WoodlandForest - ConiferBarrens
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
2 - Agriculture & aquacultureRestricted (11-30%)Moderate - slightHigh (continuing)
2.3 - Livestock farming & ranchingRestricted (11-30%)Moderate - slightHigh (continuing)
3 - Energy production & miningSmall (1-10%)Serious - slightHigh - low
3.2 - Mining & quarryingSmall (1-10%)Serious - slightHigh - low
4 - Transportation & service corridorsRestricted (11-30%)UnknownHigh - low
4.1 - Roads & railroadsRestricted (11-30%)UnknownHigh - low
4.2 - Utility & service linesNegligible (<1%)UnknownInsignificant/negligible or past
5 - Biological resource useRestricted (11-30%)UnknownHigh - low
5.3 - Logging & wood harvestingRestricted (11-30%)UnknownHigh - low
6 - Human intrusions & disturbanceNegligible (<1%)UnknownUnknown
6.1 - Recreational activitiesNegligible (<1%)UnknownUnknown

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Plant Characteristics
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
Bonanza KingShasta-Trinity National Forest16,402
References (9)
  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. California Native Plant Society (CNPS). 2013. Inventory of Rare and Endangered Plants (online edition, v8-01a). California Native Plant Society. Sacramento, CA. Online. Available: www.rareplants.cnps.org (Accessed 2013).
  4. California Natural Diversity Database (CNDDB). 2013. RareFind Version 4. California Department of Fish and Game, Sacramento.
  5. Hickman, J. C., ed. 1993. The Jepson manual: Higher plants of California. University of California Press, Berkeley, CA. 1400 pp.
  6. 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.
  7. Munz, P.A., with D.D. Keck. 1959. A California flora. Univ. California Press, Berkeley. 1681 pp.
  8. 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.
  9. 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.