Taxon Details
Symphyotrichum defoliatum
San Bernardino aster
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Taxon Summary:
Symphyotrichum defoliatum, commonly known as San Bernardino aster, is a perennial rhizomatous herb in the Asteraceae that is found only in California. It occurs within Cismontane woodland, Coastal scrub, Lower montane coniferous forest, Marshes and swamps, Meadows and seeps, and Valley and foothill grassland (vernally mesic), growing at elevations from 2 to 2040 meters. Symphyotrichum defoliatum is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.|
Scientific Name: Symphyotrichum defoliatum (Parish) Nesom |
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Common Name: San Bernardino aster |
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| Family: | Asteraceae | |
| Element Code: | PDASTE80C0 | |
| USDA Plants Symbol: | SYDE | |
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Synonyms/Other Names: |
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| Name Status: |
JEF, FNA, POWO, IPNI, Tropicos |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G2 |
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State Rank: |
S2 |
| Other Status: | BLM_S; SB_CalBG/RSABG; SB_CRES; USFS_S |
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CRPR Changes: added to 1B on 2004-08-20 |
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| Add Date: | 2004-01-01 |
| Date Edited: | 2024-11-05 |
| Lifeform: perennial rhizomatous herb | ||||||||||||||
Blooming Period: Jul-Nov
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Elevation:
2 - 2040 meters 5 - 6695 feet |
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General Habitats:
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| Microhabitat Details: near ditches, streams, springs | ||||||||||||||
Microhabitat:
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Notes: Possibly threatened by non-native plants. Possible hybrids have been collected in VEN, SBA and SLO cos. Identification of specimen from OBI Co. (221D) needs verification. A synonym of Aster bernardinus in TJM (1993). See Phytologia 77(3):279 (1994) for revised nomenclature. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 11 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 28 | 27 % |
| THREAT LIST: | ||
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| Development | 16 | 15% |
| Non-native plant impacts | 6 | 5% |
| Road/trail construction/maint. | 4 | 3% |
| Foot traffic/trampling | 3 | 2% |
| Grazing | 2 | 1% |
| Other | 2 | 1% |
| Agriculture | 1 | 0% |
| ORV activity | 1 | 0% |
| Mining | 1 | 0% |
| Erosion/runoff | 1 | 0% |
| Wood cutting or brush clearing | 1 | 0% |
| Total Occurrences: | 102 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 6 | 1 | 1 | 16 | 77 |
| Occurrence Status: | |||||
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| Historical >20 Years | 65 | ||||
| Recent <=20 Years | 37 | ||||
| Presence: | |||||
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| Presumed Extant | 86 | ||||
| Possibly Extirpated | 3 | ||||
| Presumed Extirpated | 13 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Imperial (IMP), Kern (KRN), Los Angeles (LAX), Orange (ORA), Riverside (RIV), San Bernardino (SBD), San Diego (SDG), San Luis Obispo (SLO)?, Santa Barbara (SBA) |
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Quads: Name (Quad Code) Alberhill (3311764), Anaheim (3311778), Baldwin Park (3411718), Beauty Mountain (3311646), Big Bear City (3411637), Big Bear Lake (3411628), Boucher Hill (3311638), Cabazon (3311687), Cajon (3411734), Crystal Lake (3411737), Cuddy Valley (3411971), Cuyamaca Peak (3211685), Descanso (3211675), El Casco (3311781), Fontana (3411714), Frazier Mtn. (3411878), Guasti (3411715), Harrison Mtn. (3411722), Hollywood (3411813), Idyllwild (3311666), In-ko-pah Gorge (3211661), Julian (3311615), La Habra (3311788), Lake Fulmor (3311677), Lake Mathews (3311774), Lebec (3411877), Live Oak Springs (3211663), Long Beach (3311872), Los Alamitos (3311871)*, Monument Peak (3211684), Morena Reservoir (3211665), Mount Laguna (3211674), Mount San Antonio (3411736), Murrieta (3311752)*, Newport Beach (3311768)*, Oceano (3512015)?, Ontario (3411716)*, Orcutt (3412074), Palomar Observatory (3311637), Prado Dam (3311786)*, San Bernardino North (3411723), San Bernardino South (3411713), San Dimas (3411717), San Jacinto Peak (3311676), Santa Ysabel (3311616), Seal Beach (3311861)*, Sunnymead (3311782), Telegraph Peak (3411735), Torrance (3311873), Tustin (3311767)*, Victorville (3411753), Warner Springs (3311636), Warners Ranch (3311626), Whittier (3311881), Wildomar (3311753) |
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Notes:
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Presumed Extant
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