San Diego County Viguiera [Viguiera laciniata Gray in Torr.]

San Diego County Viguiera [Viguiera laciniata Gray in Torr.]

Listing CNPS List 4 R-E-D Code 1-2-1

State/Federal. Status -- None ASTERACEAE Feb.-Jun.

Global Rank G4 State Rank S3.2

Distribution: San Diego County, Baja California, Mexico

Habitat: An arid Diegan Sage Scrub is typically the preferred habitat of this species, which is often a co-dominant element of the shrub community where it occurs, along with Artemisia californica. Generally the shrub cover is more open than at mesic, coastal locales where sage scrub is found. This species occurs on a variety of soil types. Olivenhain cobbly loam is mapped for the large populations of Viguiera at Lower Otay Lake and Sweetwater Lake; Las Posas fine sandy loam and Cieneba very rocky coarse sandy loam are utilized at some sites further inland such as near Sequan Indian Reservation.

Known Sites: This is a dominant shrub in southern San Diego County in Diegan Sage Scrub habitat away from the immediate coast. It is very common in areas of the Jamul Mountains, and found by the thousands east of Upper Otay Lake and along the north shore of Lower Otay Lake. It is also abundant near Jamul Butte, Dehesa, Donohoe Mountain, at the south end of Dillon Road on Otay Mesa, in the hills east of Isham Springs and Jamacha Road, as well as near the Sequan Indian Reservation and Sloane Canyon. San Diego Viguiera is occasional northeast of Magnolia Avenue in Santee, in Murphy Canyon north of Clairemont Mesa Boulevard, at Tim Street in Bonita, by Lynndale Lane east of Interstate 805 in Chula Vista, around Lake Murray such as near Navajo Road, at Hidden Mountain Drive near El Cajon, on the north-facing slopes overlooking the Otay River near Bayer Boulevard, at the terminus of Halifax Street in the Mission Gorge area, off Valley View Truck Trail in El Cajon, near Serena Road in the Eucalyptus Hills area, by Farrell Lane in Crest, by Fuerte Valley Road in the Calavo Gardens area, near Ivanho Street on Dictionary Hill, off Vista de Chaparros Drive in Jamul, near Chester Grade Road in La Mesa, between Imperial Avenue and 59th Street in Encanto, in Johnson Canyon on northeastern Otay Mesa, and in La Zanja Canyon near Rancho Santa Fe. It is rare north of Highway 78 and progressively more common as one travels south. It is found in open sage scrub in Military Sector Charlie on Camp Pendleton overlooking San Mateo Creek, its northernmost known locale. Old reports include east to Potrero, at Tecate, and near Barrett. Well inland it becomes uncommon north of Poway.

Forty-two collections are found at the San Diego Natural History Museum's herbarium from Baja California; south to 28 6' North; where collected by Moran (SD 65229) approximately 5.5 miles southwest of Rancho el Canon. It is common immediately south of San Diego County into Baja California. At many locales it is the dominant shrub, such as at Baja Del Mar.

Status: San Diego County Viguiera is declining but still found at many hundreds of locales where occasionally it is a dominant shrub. This species shows some ability to colonize areas of mild disturbance and is readily grown from seed. This species is recommended for de-listing by the CNPS; it is too common and wide-ranging in San Diego County to warrant such a listing.

Golden Violet [Viola aurea Kellogg

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

State/Federal. Status -- None VIOLACEAE Apr.-Jun.

Global Rank G3G4 State Rank S2S3

Distribution: San Diego County, San Bernardino County, Kern County, Mono County; Nevada

Habitat: This small, perennial herb is reported to grow in Great Basin Scrub and Pinyon/Juniper Woodland on sandy slopes.

Known Sites: In San Diego County a few plants keying roughly to this species based on leaf morphology were observed in arid, sandy openings at the edge of coniferous forest in Palomar State Park. These plants with deeply and regularly toothed leaves may represent forms of the wide-ranging and variable Viola purpurea. Reported by Twisselmann as rare on the eastern slope of the Tehachapi Mountains southwest to Mount Pinos; also an isolated population one mile north of the McKittrick Highway along the summit of the Temblor Range. Golden Violet is also reported from Cajon Pass in San Bernardino County.

Status: More information on this species is needed; present status is unknown for Southern California. Additional taxonomic work is recommended to more adequately differentiate this species from other related violets which may grow within its reputed range.


Copyright May 1994 Craig H. Reiser.

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