Species Details

Pentachaeta lyonii

Lyon's pentachaeta

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Scientific Name:
Pentachaeta lyonii Gray
Common Name:
Lyon's pentachaeta
Family: Asteraceae
Element Code: PDAST6X060
USDA Plants Symbol: PELY4
Synonyms/Other Names:
Fed List: FE (1997-01-29)
State List: CE (1990-01-01)
Global Rank: G1
State Rank:
S1
CA Rare Plant Rank: 1B.1
Other Status: SB_CalBG/RSABG
CRPR Changes:
Add Date: 1974-01-01
Date Edited: 2021-05-26
Lifeform: annual herb
Blooming Period: (Feb)Mar-Aug
Elevation:
30 - 690 meters
100 - 2265 feet
General Habitat:
  • Chaparral (openings)
  • Coastal scrub
  • Valley and foothill grassland
General Micro Habitat: rocky, clay
Micro Habitat:
Notes:
Threatened by development, alteration of fire regimes, trampling, vehicles, and recreational activities. Seriously threatened by non-native plants; annual non-native grasses are an indirect factor contributing to extirpation. No successful translocation attempts as of 1994. See Synoptical Flora of North America 1(2):446 (1884) for original description, University of California Publications in Botany 65:1-41 (1973) for taxonomic treatment, and MadroƱo 58(2):69-77 (2011) for information on the impacts of non-native plants and management implications.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 45
Element Occurrence Ranks:
A B C D X U
3 19 10 3 6 4
Occurrence Status:
Historical >20 Years 24
Recent <=20 Years 21
Presence:
Presumed Extant 39
Possibly Extirpated 5
Presumed Extirpated 1
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Los Angeles (LAX), Ventura (VEN)
Quads: Name (Quad Code)
Long Beach (3311872)*, Malibu Beach (3411816), Newbury Park (3411828), Point Dume (3411817), San Pedro (3311863)*, Santa Catalina North (3311844)?*, Simi (3411837), Thousand Oaks (3411827), Torrance (3311873)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads