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Hesperolinon tehamense

H.K. Sharsmith

Paskenta Grade Dwarf-flax

G2Imperiled Found in 2 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
MediumThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.152413
Element CodePDLIN010C0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderLinales
FamilyLinaceae
GenusHesperolinon
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 Date2015-08-04
Change Date2015-08-04
Edition Date2015-08-04
Edition AuthorsDavis, G., rev. R. Bittman (2015)
Threat ImpactMedium
Range Extent100-250 square km (about 40-100 square miles)
Number of Occurrences6 - 20
Rank Reasons
Endemic to a small area in northern California. Hesperolinon tehamense is known from 16 occurrences of which 5 are historical and need rechecking. Most documented occurrences are along roads and therefore are at risk of road maintenace activity, vehicle traffic, and invasive species.
Range Extent Comments
California endemic. Most occurrences are in a small area of southwestern Tehama County; there are also a couple in Glenn County (CNDDB 2015).
Occurrences Comments
There are 16 mapped occurrences; 5 are historical and need rechecking (CNDDB 2015).
Threat Impact Comments
Threats include ORVs, roads, invasive species (star thistle) (CNDDB 2015).
Ecology & Habitat

Habitat

Chaparral, cismontane woodland, serpentinite.
Terrestrial Habitats
Forest/WoodlandShrubland/chaparralBarrens
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
4 - Transportation & service corridors———
4.1 - Roads & railroads———
6 - Human intrusions & disturbance———
6.1 - Recreational activities———
8 - Invasive & other problematic species, genes & diseases———
8.1 - Invasive non-native/alien species/diseases———

—

Plant Characteristics
DurationANNUAL
Economic Value (Genus)No
Roadless Areas (2)
California (2)
AreaForestAcres
GrindstoneMendocino National Forest26,031
Thomes CreekMendocino National Forest16,616
References (8)
  1. California Native Plant Society (CNPS). 2010. Inventory of Rare and Endangered Plants. California Native Plant Society. Sacramento, CA. Online. Available: http://www.cnps.org/inventory (accessed 2010).
  2. California Natural Diversity Database (CNDDB). 2008. Data on area of occupancy and range. October 2008. California Department of Fish and Game, Sacramento.
  3. California Natural Diversity Database (CNDDB). 2010. RareFind Version 3.1.0 with dataset 1/4/2010 downloaded from http://www.dfg.ca.gov/biogeodata/cnddb/rf_ftpinfo.asp. California Department of Fish and Game, Sacramento.
  4. California Natural Diversity Database (CNDDB). 2015. RareFind Version 5.1.1. California Department of Fish and Game, Sacramento, CA.
  5. Consortium of California Herbaria. 2010. Online database of vascular plant specimens in California herbaria. Online. Available: http://ucjeps.berkeley.edu/consortium/ (accessed 2010).
  6. Flora of North America Editorial Committee (FNA). 2016. Flora of North America north of Mexico. Vol. 12. Magnoliophyta: Vitaceae to Garryaceae. Oxford Univ. Press, New York. xxiv + 603 pp.
  7. 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.
  8. 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.