Species Details
Packera layneae
Layne's ragwort
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Species Description:
Packera layneae, commonly known as Layne's ragwort, is a perennial herb in the Asteraceae that is found only in California. It occurs within Chaparral, and Cismontane woodland, growing at elevations from 200 to 1085 meters. Packera layneae is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Packera layneae (Greene) W.A. Weber & A. Love |
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Common Name: Layne's ragwort |
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| Family: | Asteraceae | |
| Element Code: | PDAST8H1V0 | |
| USDA Plants Symbol: | PALA41 | |
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Synonyms/Other Names: |
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| Name Status: |
JEP, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | FT (1996-10-18) |
| State List: | CR (1979-11-01) |
| Global Rank: | G2 |
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State Rank: |
S2 |
| Other Status: | SB_CalBG/RSABG; SB_UCBG; SB_UCSC |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2022-06-08 |
| Lifeform: perennial herb | ||||||||||||||
Blooming Period: Apr-Aug
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Elevation:
200 - 1085 meters 655 - 3560 feet |
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General Habitats:
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| Microhabitat Details: | ||||||||||||||
Microhabitat:
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Notes: Threatened by urbanization, development, clearing, grazing, road construction, vehicles, non-native plants, and fire suppression. See Senecio layneae in TJM (1993). See Bulletin of the Torrey Botanical Club 10:87 (1883) for original description. See Phytologia 49(1): 44-50 (1981) for revised nomenclature. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 18 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 32 | 67 % |
| THREAT LIST: | ||
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| Development | 16 | 33% |
| Road/trail construction/maint. | 14 | 29% |
| ORV activity | 6 | 12% |
| Other | 6 | 12% |
| Mining | 4 | 8% |
| Recreational use (non-ORV) | 4 | 8% |
| Erosion/runoff | 4 | 8% |
| Grazing | 3 | 6% |
| Vandalism/dumping/litter | 3 | 6% |
| Non-native plant impacts | 3 | 6% |
| Logging | 2 | 4% |
| Biocides | 2 | 4% |
| Dam/Inundation | 1 | 2% |
| Disking | 1 | 2% |
| Agriculture | 1 | 2% |
| Landfill | 1 | 2% |
| Pollution | 1 | 2% |
| Wood cutting or brush clearing | 1 | 2% |
| Total Occurrences: | 48 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 2 | 19 | 6 | 4 | 2 | 15 |
| Occurrence Status: | |||||
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| Historical >20 Years | 25 | ||||
| Recent <=20 Years | 23 | ||||
| Presence: | |||||
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| Presumed Extant | 46 | ||||
| Possibly Extirpated | 2 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) El Dorado (ELD), Placer (PLA), Tuolumne (TUO), Yuba (YUB) |
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Quads: Name (Quad Code) Chinese Camp (3712074), Clarksville (3812161), Coloma (3812078), Dutch Flat (3912027), Foresthill (3912017), Garden Valley (3812077), Georgetown (3812087), Moccasin (3712073), Pilot Hill (3812171), Placerville (3812067), Rackerby (3912143), Shingle Springs (3812068) |
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Notes:
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Presumed Extant
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