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Layia munzii

Keck

Munz's Tidy-tips

G2Imperiled Found in 2 roadless areas NatureServe Explorer →
G2ImperiledGlobal Rank
Very highThreat Impact
Identity
Unique IDELEMENT_GLOBAL.2.146059
Element CodePDAST5N0B0
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryVascular Plant
Endemicendemic to a single state or province
KingdomPlantae
PhylumAnthophyta
ClassDicotyledoneae
OrderAsterales
FamilyAsteraceae
GenusLayia
Other Common Names
Munz's tidytips (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 Date2017-07-15
Change Date2017-07-15
Edition Date2017-07-15
Edition AuthorsR. Bittman (2005, 2017), rev. Treher (2018)
Threat ImpactVery high
Range Extent5000-20,000 square km (about 2000-8000 square miles)
Number of Occurrences1 - 5
Rank Reasons
Layia munzii is a California endemic known only from Fresno, Kern, San Benito, and San Luis Obispo counties. There are 57 occurrences but 25 are historical and need to be surveyed for up to date survey information. Known threats include grazing and land disturbance such as cable removal.
Range Extent Comments
Layia munzii is endemic to central California in four counties: Fresno, Kern, San Benito, and San Luis Obispo.
Occurrences Comments
There are 57 extant occurrences but are 25 historic (last surveyed 20 or more years ago). An additional two occurrences are confirmed to be extirpated.
Threat Impact Comments
It is not well understood how some occurrences were extirpated. It may have been a combination of overgrazing followed by development. The extant occurrences are threatened by agriculture and grazing and by disturbance such as cable installation/removal, weeds, trampling, ORVs, and roads.
Ecology & Habitat

Habitat

This species occurs on alkaline flats with heavy clay soil, sometimes in swales. It occurs in the Alkali Sink/Saline Plains plant community, within Valley Grassland or Shadscale/Chenopod Scrub. Co-occurring species of Layia munzii include Distichlis spicata, Atriplex spinifera, A. coronata, Allenrolfea occidentalis (in strongly alkaline spots), Frankenia campestris, Cressa truxillensis, Isocoma acradenia, and Lasthenia ferrisiae. It occurs at elevations of 150 to 700 m.
Terrestrial Habitats
Shrubland/chaparralGrassland/herbaceousDesertPlaya/salt flat
Palustrine Habitats
TEMPORARY POOL
Other Nations (1)
United StatesN2
ProvinceRankNative
CaliforniaS2Yes
Threat Assessments
ThreatScopeSeverityTiming
1 - Residential & commercial development———
2 - Agriculture & aquaculture———
2.3 - Livestock farming & ranching———
4 - Transportation & service corridors———
4.2 - Utility & service lines———

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Plant Characteristics
DurationANNUAL
Economic Value (Genus)No
Roadless Areas (2)
California (2)
AreaForestAcres
Fox MountainLos Padres National Forest52,072
Lpoor CanyonLos Padres National Forest13,762
References (8)
  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. Hoover, R.F. 1970. The vascular plants of San Luis Obispo County, California. Univ. California Press, Berkeley. 350 pp.
  5. 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.
  6. Munz, P.A., with D.D. Keck. 1959. A California flora. Univ. California Press, Berkeley. 1681 pp.
  7. Smith, C.F. 1998. A flora of the Santa Barbara region, California. 2nd edition. Santa Barbara Botanic Garden and Capra Press, Santa Barbara. 391 pp.
  8. Twisselmann, E.C. 1967. A flora of Kern County, California. California Native Plant Society, Sacramento. 395 pp.