Roadless Areas
Home/Species/ Yosemite Lewisia

Lewisia disepala

Rydb.

Yosemite Lewisia

G2Imperiled Found in 1 roadless area NatureServe Explorer →
G2ImperiledGlobal Rank
HighThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.158074
Element CodePDPOR04060
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderCaryophyllales
FamilyMontiaceae
GenusLewisia
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 Date2016-06-09
Change Date1997-03-14
Edition Date2016-06-09
Edition AuthorsGries, D., and M. Martinez, rev. A. Treher (2016)
Threat ImpactHigh
Number of Occurrences6 - 80
Rank Reasons
California endemic of the Sierra Nevada Mountains. It is known from 11 recent and 11 historic occurrences. In 1997, it was estimated that there are less than 10,000 plants overall. Threats include ORVs, recreation, logging, and roads. All occurrences are on federal lands (NF, NPS, and BLM).
Range Extent Comments
California endemic, Kern, Madera, Mariposa, and Tulare Counties (Skinner, 1997).
Occurrences Comments
Known from 22 presumed extant occurrences: 11 recent and 11 historic.
Threat Impact Comments
Threats include ORVs, recreation (camping), logging, and roads. Off-highway vehicles using road cuts (e.g. roads that used to be the access to an old quarry) threaten some populations. Also, timber harvest and its associated vehicular activity have damaged one of the populations.
Ecology & Habitat

Habitat

Lower montane coniferous forest, pinyon and juniper woodland, upper montane coniferous forest; granitic, sandy soils (Skinner, 1997).
Terrestrial Habitats
Forest/WoodlandForest - ConiferWoodland - Conifer
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
4 - Transportation & service corridorsSmall (1-10%)UnknownHigh (continuing)
4.1 - Roads & railroadsSmall (1-10%)UnknownHigh (continuing)
5 - Biological resource useSmall (1-10%)UnknownHigh (continuing)
5.3 - Logging & wood harvestingSmall (1-10%)UnknownHigh (continuing)
6 - Human intrusions & disturbanceLarge (31-70%)UnknownHigh (continuing)
6.1 - Recreational activitiesLarge (31-70%)UnknownHigh (continuing)

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Plant Characteristics
DurationPERENNIAL, EVERGREEN
Economic Value (Genus)No
Roadless Areas (1)
California (1)
AreaForestAcres
Devil GulchSierra National Forest30,490
References (3)
  1. California Department of Fish and Game. 1997. RareFind 2 personal computer program. Information dated March 1999. Sacramento, California.
  2. 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.
  3. 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.