Taxon Report
Pentachaeta lyonii GrayLyon's pentachaeta |
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Classification
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Scientific Name: |
Pentachaeta lyonii Gray |
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Common Name: |
Lyon's pentachaeta |
| Family: | Asteraceae |
| Element Code: | PDAST6X060 |
| USDA Plants Symbol: | PELY4 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: (Feb)Mar-Aug | (Feb)Mar-Aug |
| Elevation: | 30-690 (100-2265) |
| General Habitats: | Chaparral, Coastal scrub, Valley and foothill grassland |
| Microhabitat: | Clay, Rocky |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FE |
| Other Status: | SB_CalBG/RSABG |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 45 |
| Element Occurrence Ranks: | |
| Excellent (A) | 3 |
| Good (B) | 19 |
| Fair (C) | 10 |
| Poor (D) | 3 |
| None (X) | 6 |
| Unknown (U) | 4 |
| California Endemic: True | |
| 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) | |
Threat List Data from the CNDDB
| Threat List Total: | 14 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 38 | 84 % | |
| 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% |
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: |
Citation
California Native Plant Society, Rare Plant Program. 2024. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 29 December 2024].