Threatened by development. Seriously attacked by the five-spined ips bark beetle at Torrey Pines SR, but biological control apparently has contained this infestation. See American Forests 91(10):26-29 (1985) for species account, and Systematic Botany 11(1):39-50 (1986) for taxonomic treatment.
California Counties and Islands:name (code) Santa Barbara (SBA), San Diego (SDG)
Quads:name (DWR code) USGS code Del Mar (022B) 32117H2, La Jolla (022C) 32117G2, Rancho Santa Fe (035C) 33117A2, Oceanside (036B) 33117B4, Encinitas (036D) 33117A3, Santa Rosa Island East (SROE) 33119H8
Definitions of codes preceding a county and/or quad:
Uncertain about distribution or identity
Uncertain about distribution, but presumed extirpated if once present
Occurrence confirmed, but possibly extirpated
Species may be present in other areas where conditions are favorable.
32117H2=Del Mar (022B) 32117H2;32117G2=La Jolla (022C) 32117G2;33117A2=Rancho Santa Fe (035C) 33117A2;33117B4=Oceanside (036B) 33117B4;33117A3=Encinitas (036D) 33117A3;33119H8=Santa Rosa Island East (SROE) 33119H8