Taxon Report
Rorippa subumbellata Roll.Tahoe yellow cress |
|
Taxon Summary
Rorippa subumbellata, commonly known as Tahoe yellow cress, is a perennial rhizomatous herb in the Brassicaceae that is found in California and elsewhere. It occurs within Lower montane coniferous forest, and Meadows and seeps, growing at elevations from 1890 to 1905 meters. Rorippa subumbellata is ranked 1B.1, Plants Rare, Threatened or Endangered in California and Elsewhere; Seriously threatened in California.Classification
|
Scientific Name: |
Rorippa subumbellata Roll. |
|
Common Name: |
Tahoe yellow cress |
| Family: | Brassicaceae |
| Element Code: | PDBRA270M0 |
| USDA Plants Symbol: | ROSU2 |
|
Synonyms/Other Names: |
|
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 |
|
State Rank: |
S1 |
| State List: | CE |
| Fed List: | None |
| Other Status: | SB_BerrySB; SB_CalBG/RSABG; USFS_S |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 31 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 7 |
| Fair (C) | 4 |
| Poor (D) | 0 |
| None (X) | 3 |
| Unknown (U) | 17 |
| 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 |
| 18 | 58 % | |
| Recreational use (non-ORV) | 15 | 48% |
| Foot traffic/trampling | 11 | 35% |
| Altered flood/tidal/hydrologic regime | 8 | 25% |
| Development | 5 | 16% |
| Erosion/runoff | 3 | 9% |
| Vandalism/dumping/litter | 2 | 6% |
| Grazing | 2 | 6% |
| Non-native plant impacts | 2 | 6% |
| Other | 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. |
|
Threats: |
|
Taxonomy: |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 16 November 2025].