Taxon Report
Deinandra conjugens (Keck) B.G. BaldwinOtay tarplant |
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Classification
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Scientific Name: |
Deinandra conjugens (Keck) B.G. Baldwin |
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Common Name: |
Otay tarplant |
| Family: | Asteraceae |
| Element Code: | PDAST4R070 |
| USDA Plants Symbol: | DECO13 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: (Apr)May-Jun | (Apr)May-Jun |
| Elevation: | 25-300 (80-985) |
| General Habitats: | Coastal scrub, Valley and foothill grassland |
| Microhabitat: | Clay |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1G2 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | FT |
| Other Status: | SB_CalBG/RSABG; SB_CRES |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 42 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 11 |
| Fair (C) | 7 |
| Poor (D) | 5 |
| None (X) | 0 |
| Unknown (U) | 19 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Dulzura (3211667), Imperial Beach (3211751), Jamul Mountains (3211668), National City (3211761), Otay Mesa (3211658) | |
Threat List Data from the CNDDB
| Threat List Total: | 14 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 34 | 81 % | |
| Non-native plant impacts | 25 | 59% |
| Development | 21 | 50% |
| Foot traffic/trampling | 15 | 35% |
| Road/trail construction/maint. | 15 | 35% |
| Vandalism/dumping/litter | 13 | 30% |
| ORV activity | 12 | 28% |
| Erosion/runoff | 10 | 23% |
| Wood cutting or brush clearing | 7 | 16% |
| Other | 5 | 11% |
| Improper burning regime | 3 | 7% |
| Altered flood/tidal/hydrologic regime | 2 | 4% |
| Recreational use (non-ORV) | 2 | 4% |
| Grazing | 2 | 4% |
| Non-native animal impacts | 1 | 2% |
Notes
| Threatened by development, agriculture, vehicles, illegal dumping, foot traffic, non-native plants, habitat disturbance, and Border Patrol activities. Possibly threatened by landfill construction. Known in BA from only one occurrence. State and federally listed as Hemizonia conjugens; see this name in The Jepson Manual. See Aliso 4(1):109 (1958) for original description, Madroño 25(3):159 (1978) for information on distribution and taxonomy, and Novon 9:462-471 (1999) for revised nomenclature. |
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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 28 December 2024].