Taxon Report
Cuscuta jepsonii Yunck.Jepson's dodder |
 ©2019 Dean Wm. Taylor |
Taxon Summary
Cuscuta jepsonii, commonly known as Jepson's dodder, is a annual vine (parasitic) in the Convolvulaceae that is found only in California. It occurs within Lower montane coniferous forest, and North Coast coniferous forest, growing at elevations from 1200 to 2300 meters. Cuscuta jepsonii is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Cuscuta jepsonii Yunck. |
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Common Name: |
Jepson's dodder |
| Family: | Convolvulaceae |
| Element Code: | PDCUS011T0 |
| USDA Plants Symbol: | |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | annual vine (parasitic) |
| Blooming Period: Jul-Sep | Jul-Sep |
| Elevation: | 1200-2300 (3935-7545) |
| General Habitats: | Lower montane coniferous forest, North Coast coniferous forest |
| Microhabitat: | |
| Microhabitat Details: | Occurs on Ceanothus diversifolius and C. prostratus. |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G3 |
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State Rank: |
S3 |
| State List: | None |
| Fed List: | None |
| Other Status: | |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 28 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 5 |
| Fair (C) | 1 |
| Poor (D) | 0 |
| None (X) | 0 |
| Unknown (U) | 22 |
| California Endemic: True | |
| California Counties and Islands: Name (Code) | |
| Amador (AMA), Calaveras (CAL), Lake (LAK), Madera (MAD), Mariposa (MPA), Mendocino (MEN), Shasta (SHA), Siskiyou (SIS), Trinity (TRI), Tulare (TUL) | |
| Quads: Name (Quad Code) | |
| Bass Lake (3711935), Black Rock Mtn. (4012321), Burney Mtn. West (4012176), Case Mountain (3611847), Damnation Peak (4012285), Devils Nose (3812044), Dubakella Mtn. (4012342), Eaton Peak (4112238), Elk Mountain (3912238), Fish Camp (3711946), Forest Glen (4012333), Garnet Hill (3812043), McCloud (4112232), Moses Mtn. (3611836), North Yolla Bolly (4012228), Pondosa (4112126), Pony Buck Peak (4012331), Silver City (3611846), Trinity Center (4012286), Van Arsdale Reservoir (3912341), Wawona (3711956), White Chief Mtn. (3711945) | |
Threat List Data from the CNDDB
| Threat List Total: | 5 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 12 | 43 % | |
| Logging | 8 | 28% |
| Wood cutting or brush clearing | 3 | 10% |
| Road/trail construction/maint. | 1 | 3% |
| Biocides | 1 | 3% |
| Foot traffic/trampling | 1 | 3% |
Notes
| Previously on CRPR 3. Last collected on Mt. Shasta in 1954; where recent surveys were unsuccessful. Identification of specimen from MPA Co. (437C) needs verification. See Illinois Biological Monograph 6:149 (1921) for original description, and SIDA 22(1):222-223 (2006) and American Journal of Botany 96(9):1744-1750 (2009) for taxonomic treatment. |
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Threats: |
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Taxonomy: |
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A synonym of C. indecora var. indecora in TJM (1993). |
Selected References
| CRPR List Addition on 2007-02-16 |
| CRPR List Change on 2011-08-24 |
| USFS Potential Species of Conservation Concern Profile |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 27 January 2025].