Taxon Report
Thysanocarpus rigidus (Munz) P.J. Alexander & Windhamrigid fringepod |
|
Taxon Summary
Thysanocarpus rigidus, commonly known as rigid fringepod, is a annual herb in the Brassicaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland, growing at elevations from 600 to 2200 meters. Thysanocarpus rigidus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
|
Scientific Name: |
Thysanocarpus rigidus (Munz) P.J. Alexander & Windham |
|
Common Name: |
rigid fringepod |
| Family: | Brassicaceae |
| Element Code: | PDBRA2Q070 |
| USDA Plants Symbol: | |
|
Synonyms/Other Names: |
|
Ecology and Life History
| Lifeform: | annual herb |
| Blooming Period: Feb-May | Feb-May |
| Elevation: | 600-2200 (1970-7220) |
| General Habitats: | Pinyon and juniper woodland |
| Microhabitat: | Dry, Rocky, Slopes |
| Microhabitat Details: |
Conservation Status
| CA Rare Plant Rank: | 1B.2 |
| Global Rank: | G2 |
|
State Rank: |
S2 |
| State List: | None |
| Fed List: | None |
| Other Status: | BLM_S; SB_CalBG/RSABG; USFS_S |
|
CRPR Changes: |
|
Occurrence Data from the CNDDB
| Total Occurrences: | 15 |
| Element Occurrence Ranks: | |
| Excellent (A) | 0 |
| Good (B) | 0 |
| Fair (C) | 0 |
| Poor (D) | 0 |
| None (X) | 1 |
| Unknown (U) | 14 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Los Angeles (LAX), Riverside (RIV), San Bernardino (SBD), San Diego (SDG) | |
| Quads: Name (Quad Code) | |
| Butterfly Peak (3311655), Idyllwild (3311666), Ivanpah (3511533), Monument Peak (3211684), Mount Laguna (3211674), Mt. Baldy (3411726), Ontario (3411716), Pacifico Mountain (3411841), Palm View Peak (3311665), Toro Peak (3311654) | |
Threat List Data from the CNDDB
| Threat List Total: | 3 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 2 | 13 % | |
| Development | 1 | 6% |
| Recreational use (non-ORV) | 1 | 6% |
| Vandalism/dumping/litter | 1 | 6% |
Notes
| Known from fewer than 10 occurrences in CA and from one occurrence in BA. Possibly threated by development and non-native plants. See T. laciniatus var. rigidus in TJM 2. See Bulletin of the Southern California Academy of Sciences 31: 62 (1932) for original description and Systematic Botany 35(3): 559-577 (2010) for taxonomic treatment. |
|
Threats: |
|
Taxonomy: |
Selected References
| CRPR List Addition on 2011-03-17 |
Citation
California Native Plant Society, Rare Plant Program. 2025. Rare Plant Inventory (online edition, v9.5.1). Website https://www.rareplants.cnps.org [accessed 21 November 2025].