Round-leaved Boykinia [Boykinia rotundifolia Parry]

Round-leaved Boykinia [Boykinia rotundifolia Parry]

Listing CNPS List 4 R-E-D Code 1-1-3

State/Federal. Status -- None SAXIFRAGACEAE Jun.-Jul.

Global Rank G3G4 State Rank S?

Distribution: San Diego County, Orange County, Los Angeles County, Riverside County, Santa Barbara County, San Bernardino County, and Ventura County

Habitat: Lower montane coniferous forest with relatively mesic conditions (e.g., along streamcourses) is a typical habitat for Round-leaved Boykinia. In the Palomar Mountains this perennial herb with large leaves was found growing in deep shade (mapped as Tollhouse rocky coarse sandy loam), near a spring with Symphoricarpos mollis.

Known Sites: This boykinia grows along Palomar Mountain's Highway to the Stars below Nellie. This area was burned during a major Palomar mountain fire in the late 1980's; however, the plant was still present two years later. Herbarium specimens were examined from a stream flowing north from the Agua Tibia Wilderness Area, in Daisy Mae Meadow on Volcan Mountain, and a canyon near the crest of Volcan Mountain. Reported by Roberts in the Santa Ana Mountains of Orange County at Lost Woman Canyon, Holy Jim Canyon, Central Santiago Canyon, and Upper McVicker Canyon. Reported by Smith in the Santa Barbara region at Ozena Campground in upper Cuyuma Valley; also by Raven in Los Angeles County at lower Malibu Canyon. Additional herbarium specimens seen were from Vista Grande Road 1 mile east of the Banning/Idyllwild Road in Riverside County; both Snow Creek and Grapevine Spring on San Gabriel Mountain in San Bernardino County; Mount Baldy and Santa Ana Canyon in the mountains of Los Angeles County. Round-leaf Boykinia is reportedly fairly regular along drainages and in shaded locales on the southern flanks of the San Bernardino Mountains, and is also reported in Day Canyon in the San Gabriel Mountains.

Status: This montane species is presumed stable in Southern California, given the relatively broad known range. However, until more cumulative population information can be gathered, it is recommended that all populations be protected.

Copyright May 1994 Craig H. Reiser.

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