Taxon Report
Streptanthus oliganthus Roll.Masonic Mountain jewelflower |
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Taxon Summary
Streptanthus oliganthus, commonly known as Masonic Mountain jewelflower, is a perennial herb in the Brassicaceae that is found in California and elsewhere. It occurs within Pinyon and juniper woodland (granitic, rocky, and volcanic), growing at elevations from 1980 to 3050 meters. Streptanthus oliganthus is ranked 1B.2, Plants Rare, Threatened or Endangered in California and Elsewhere; Moderately threatened in California.Classification
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Scientific Name: |
Streptanthus oliganthus Roll. |
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Common Name: |
Masonic Mountain jewelflower |
| Family: | Brassicaceae |
| Element Code: | PDBRA2G0V0 |
| USDA Plants Symbol: | STOL |
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Synonyms/Other Names: |
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Ecology and Life History
| Lifeform: | perennial herb |
| Blooming Period: Jun-Jul | Jun-Jul |
| Elevation: | 1980-3050 (6495-10005) |
| General Habitats: | Pinyon and juniper woodland |
| Microhabitat: | |
| Microhabitat Details: |
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: | BLM_S; USFS_S |
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CRPR Changes: |
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Occurrence Data from the CNDDB
| Total Occurrences: | 21 |
| Element Occurrence Ranks: | |
| Excellent (A) | 1 |
| Good (B) | 3 |
| Fair (C) | 1 |
| Poor (D) | 1 |
| None (X) | 0 |
| Unknown (U) | 15 |
| California Endemic: False | |
| California Counties and Islands: Name (Code) | |
| Alpine (ALP), Mono (MNO), Tuolumne (TUO) | |
| Quads: Name (Quad Code) | |
| Bridgeport (3811932), Chris Flat (3811944), Conway Stage Station (3811941), Dome Hill (3811931), Kirkwood Spring (3811828), Lundy (3811912), Mt. Patterson (3811943), Pickel Meadow (3811935), Sonora Pass (3811936), Sweetwater Creek (3811942) | |
Threat List Data from the CNDDB
| Threat List Total: | 5 | |
| EOs with Threat Listed: | Total EOs | % of EOs |
| 5 | 24 % | |
| Erosion/runoff | 1 | 4% |
| Improper burning regime | 1 | 4% |
| Military operations | 1 | 4% |
| Mining | 1 | 4% |
| Road/trail construction/maint. | 1 | 4% |
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 November 2025].