Taxon Report
Rorippa subumbellata Roll.Tahoe yellow cress |
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Classification
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Scientific Name: |
Rorippa subumbellata Roll. |
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Common Name: |
Tahoe yellow cress |
| Family: | Brassicaceae |
| Element Code: | PDBRA270M0 |
| USDA Plants Symbol: | ROSU2 |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial rhizomatous herb |
| Blooming Period: May-Sep | May-Sep |
| Elevation: | 1890-1905 (6200-6250) |
| General Habitats: | Lower montane coniferous forest, Meadows and seeps |
| Microhabitat: | Decomposed granitic |
| Microhabitat Details: | decomposed granitic beaches |
Conservation Status
| CA Rare Plant Rank: | 1B.1 |
| Global Rank: | G1 |
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State Rank: |
S1 |
| State List: | CE |
| Fed List: | None |
| Other Status: | SB_BerrySB; SB_CalBG/RSABG; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 33 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 7 |
| Fair (C) | 5 |
| Poor (D) | 0 |
| None (X) | 3 |
| Unknown (U) | 18 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| El Dorado (ELD), Nevada (NEV)*, Placer (PLA) | |
| Quads: Name (Quad Code) | |
| Emerald Bay (3812081), Homewood (3912012), Kings Beach (3912021)*, Meeks Bay (3912011), South Lake Tahoe (3811988), Tahoe City (3912022), Truckee (3912032)* | |
Threat List Data from the CNDDB
| Threat List Total: | 11 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 20 | 61 % | |
| Recreational use (non-ORV) | 17 | 51% |
| Foot traffic/trampling | 12 | 36% |
| Altered flood/tidal/hydrologic regime | 8 | 24% |
| Development | 6 | 18% |
| Erosion/runoff | 4 | 12% |
| Other | 3 | 9% |
| Vandalism/dumping/litter | 2 | 6% |
| Grazing | 2 | 6% |
| Non-native plant impacts | 2 | 6% |
| ORV activity | 1 | 3% |
| Waterway bank protection/maintenance | 1 | 3% |
Notes
| Known in CA only from Lake Tahoe; many historical occurrences extirpated. Seriously threatened by development, recreation, foot traffic, and inundation; recovery work underway. State-listed as Critically Endangered in NV. Previously a candidate for federal listing. See Contributions from the Dudley Herbarium 3:177 (1941) for original description. |
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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].