Species Details
Boechera johnstonii
Johnston's rockcress
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Scientific Name: Boechera johnstonii (Munz) Al-Shehbaz |
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Common Name: Johnston's rockcress |
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| Family: | Brassicaceae | |
| Element Code: | PDBRA060Y0 | |
| USDA Plants Symbol: | ||
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Synonyms/Other Names: |
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| CA Rare Plant Rank: | 1B.2 |
| Fed List: | None |
| State List: | None |
| Global Rank: | G1 |
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State Rank: |
S1 |
| Other Status: | SB_CalBG/RSABG; USFS_S |
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CRPR Changes: |
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| Add Date: | 1974-01-01 |
| Date Edited: | 2022-06-08 |
| Lifeform: perennial herb | ||||||||||||||
Blooming Period: Feb-Jun
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Elevation:
1350 - 2150 meters 4430 - 7055 feet |
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General Habitats:
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| Microhabitat Details: often on eroded clay | ||||||||||||||
Microhabitat:
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Notes: Known only from the southern San Jacinto Mtns. Threatened by recreational and residential development in Garner Valley. Also threatened by grazing and trampling, and possibly threatened by vegetation/fuels management projects. Boechera hirshbergiae is treated as a synonym of this plant in TJM 2; see Harvard Papers in Botany 11(1):61-88 (2006) for relative taxonomic treatment. See Bulletin of the Southern California Academy of Sciences 31:62-63 (1932) for original description, Rhodora 43(511):467-468 (1941) for taxonomic treatment, and Novon 13(4):381-391 (2003) for revised nomenclature. |
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Threats: |
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Taxonomy: |
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| Threat List Total: | 7 | |
| Total EOs | % of EOs | |
| EOs with Threat Listed: | 7 | 70 % |
| THREAT LIST: | ||
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| Grazing | 7 | 70% |
| Foot traffic/trampling | 6 | 60% |
| Development | 5 | 50% |
| Non-native plant impacts | 5 | 50% |
| Wood cutting or brush clearing | 3 | 30% |
| Recreational use (non-ORV) | 2 | 20% |
| Road/trail construction/maint. | 2 | 20% |
| Total Occurrences: | 10 | ||||
| Element Occurrence Ranks: | |||||
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| A | B | C | D | X | U |
| 1 | 0 | 0 | 0 | 0 | 9 |
| Occurrence Status: | |||||
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| Historical >20 Years | 8 | ||||
| Recent <=20 Years | 2 | ||||
| Presence: | |||||
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| Presumed Extant | 10 | ||||
| Possibly Extirpated | 0 | ||||
| Presumed Extirpated | 0 | ||||
| California Endemic: | |||||||||||||
| California Island: | |||||||||||||
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States: Name (Code) California (CA) |
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California Counties and Islands: Name (Code) Riverside (RIV) |
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Quads: Name (Quad Code) Anza (3311656), Butterfly Peak (3311655), Idyllwild (3311666), Palm View Peak (3311665), San Jacinto Peak (3311676) |
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Notes:
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Presumed Extant
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