Species Details
Pentachaeta lyonii
Lyon's pentachaeta
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Scientific Name: Pentachaeta lyonii Gray |
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Common Name: Lyon's pentachaeta |
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| Family: | Asteraceae | |
| Element Code: | PDAST6X060 | |
| USDA Plants Symbol: | PELY4 | |
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Synonyms/Other Names: |
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| CA Rare Plant Rank: | 1B.1 |
| Fed List: | FE (1997-01-29) |
| State List: | CE (1990-01-01) |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2022-06-08 |
| Lifeform: annual herb | ||||||||||||||
Blooming Period: (Feb)Mar-Aug
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Elevation:
30 - 690 meters 100 - 2265 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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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 Madroño 58(2):69-77 (2011) for information on the impacts of non-native plants and management implications. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 14 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 38 | 84 % |
| THREAT LIST: | ||
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| Development | 25 | 55% |
| Non-native plant impacts | 22 | 48% |
| Recreational use (non-ORV) | 14 | 31% |
| Foot traffic/trampling | 13 | 28% |
| Road/trail construction/maint. | 10 | 22% |
| Other | 10 | 22% |
| ORV activity | 8 | 17% |
| Grazing | 5 | 11% |
| Vandalism/dumping/litter | 5 | 11% |
| Wood cutting or brush clearing | 5 | 11% |
| Disking | 4 | 8% |
| Non-native animal impacts | 4 | 8% |
| Agriculture | 1 | 2% |
| Improper burning regime | 1 | 2% |
| Total Occurrences: | 45 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 3 | 19 | 10 | 3 | 6 | 4 |
| Occurrence Status: | |||||
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| Historical >20 Years | 26 | ||||
| Recent <=20 Years | 19 | ||||
| Presence: | |||||
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| Presumed Extant | 39 | ||||
| Possibly Extirpated | 5 | ||||
| Presumed Extirpated | 1 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Los Angeles (LAX), Ventura (VEN) |
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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) |
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Notes:
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Presumed Extant
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