Species Details

Boechera johnstonii

Johnston's rockcress

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Scientific Name:
Boechera johnstonii (Munz) Al-Shehbaz
Common Name:
Johnston's rockcress
Family: Brassicaceae
Element Code: PDBRA060Y0
USDA Plants Symbol:
Synonyms/Other Names:
Lifeform: perennial herb
Blooming Period: Feb-Jun
Elevation:
1350 - 2150 meters
4430 - 7055 feet
General Habitat:
  • Chaparral
  • Lower montane coniferous forest
General Micro Habitat: often on eroded clay
Micro Habitat:
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.
Threats:
Taxonomy:
Other:
References:
Total Occurrences: 10
Element Occurrence Ranks:
A B C D X U
1 0 0 0 0 9
Occurrence Status:
Historical >20 Years 8
Recent <=20 Years 2
Presence:
Presumed Extant 10
Possibly Extirpated 0
Presumed Extirpated 0
California Endemic:
California Island:
States: Name (Code)
California (CA)
California Counties and Islands: Name (Code)
Riverside (RIV)
Quads: Name (Quad Code)
Anza (3311656), Butterfly Peak (3311655), Idyllwild (3311666), Palm View Peak (3311665), San Jacinto Peak (3311676)
Notes:
Definitions of codes following a county and/or quad:
* Presumed extirpated
(?) Occurrence confirmed, but possibly extirpated
Quad and county data is imported from the CNDDB. Species may be present in other areas where conditions are favorable. These data should NOT be substituted for pre-project review or for on-site surveys.

Map

Presumed Extant
Counties   Quads