Laguna Mountains Jewel-flower [Streptanthus bernardinus (Greene) Parish]

Laguna Mountains Jewel-flower [Streptanthus bernardinus (Greene) Parish]

Listing CNPS List 1B R-E-D Code 2-1-2

State/Federal. Status -- /C3c BRASSICACEAE Jun.-Jul.

Global Rank G2G3 State Rank S2S3

Distribution: San Diego County, Riverside County, and San

Habitat: Lower Montane Coniferous Forest is the habitat of this inconspicuous annual. On Cuyamaca Peak it occurs in areas with partial shade or near seeps/springs on Boomer stony loams. All reports indicate populations occur in association with conifers. While typically in mesic situations, it can occupy drier embankments in granitic gravels and sand.

Known Sites: A few plants are scattered in springy locales on Cuyamaca Peak in the Cuyamaca Mountains, including alongside the road to the summit. Apparently this species has a very limited distribution. Old reports include North Peak, the north slope of Middle Peak, and an area near the Laguna Lakes. Data Base reports for Riverside County are from a north-facing slope in Hall Canyon on the UC Riverside James Reserve, in the San Jacinto Mountains near a small stream 0.25 mile south of Dark Canyon Campground along Road 4S02; in San Bernardino County from Deer Lick Station at Running Springs, along a streamside at Green Valley Road 0.25 mile from the junction with Highway 18, near Keller Peak Road in the San Bernardino Mountains, in the area of Green Valley Lake, as well as approximately 1.5 miles northeast of Running Springs and north of Green Valley Lake Road. It is reportedly locally common in this Green Valley area. CNPS reports of this species in Baja California cannot be verified.

Status: Laguna Mountains Jewel-flower is apparently stable within its limited montane range; however, it may occur in dangerously low numbers and represent a relictual species from an era of substantially greater rainfall and more mesic conditions. More collection data is needed for Riverside and San Bernardino counties. The vegetation around springs is often trampled in the vicinity of Cuyamaca Peak by hikers investigating the source of the waters, and such activities could adversely impact this fragile annual. Provisionally, all populations are recommended for protection.

Copyright May 1994 Craig H. Reiser.

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