Orcutt's Linanthus [Linanthus orcuttii (Parry & Gray) Jeps.]

Orcutt's Linanthus [Linanthus orcuttii (Parry & Gray) Jeps.]

Listing CNPS List 1B R-E-D Code 3-1-2

State/Federal. Status -- /C2 POLEMONIACEAE May-Jun.

Global Rank G3 State Rank S2.2

Distribution: San Diego, Riverside, and Los Angeles counties; Baja California, Mexico

Habitat: Montane Chaparral and lower Montane Coniferous Forest are typically utilized by this small, showy annual. Crouch stony fine sandy loams are mapped for a Palomar State Park site, while Tujunga sand occurs in the Agua Caliente Creek site. At the former Orcutt's Linanthus was seen at several locales in limited, sunny openings beneath an otherwise coniferous canopy; at the latter site it grows on the moist embankments of the creek beneath cottonwoods and willows. Tollhouse series soils are reported for the Eagle Crag site.

Known Sites: This Linanthus is rare along the campground trail below Nate Harrison Grade in Palomar State Park; also nearby, below Boucher Hill in openings in recently burned coniferous forest. A small population occurs in a sandy drainage with chaparral north of Oakzanita near the State Park boundary. This species is apparently quite rare and localized. It is scattered along Agua Caliente Creek in wet sand at Warner Hot Springs. Old reports are from Hot Springs Mountain, Garnet Peak, Cutca Valley, and Monument Peak. Data Base reports are from the Palomar Mountains at the eastern foot of Morgan Hill, near Bailey's Camp, on the old road to Henshaw Dam, near Eagle Crag on the abandoned Palomar Divide Road, south of Wildhorse Peak, and in Upper Doane Valley; as well as along the truck trail from Los Coyotes Indian Reservation to the Lost Valley area, on Airplane Ridge in Cuyamaca Rancho State Park, at the base of Oakzanita Peak, and east of Hot Springs Mountain north of San Ignacio. Another Data Base report notes a 1925 CAS herbarium collection from near Pasadena in Los Angeles County; this specimen may be misidentified, given the disjunct locale, and should be re-examined.

Nine herbarium specimens from Baja California are found in the San Diego Natural History Museum; south to 30 43' North at Santa Eulalia in the San Pedro Martir where collected by Moran (SD 100673).

Status: Orcutt's Linanthus populations are apparently stable given the limited historical impacts to potential montane habitat and impacts to known sites. Many of the reported sites lie within state park or national forest lands. All populations should be protected.

Copyright May 1994 Craig H. Reiser.

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