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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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| 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: | ||
|---|---|---|
| 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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