Global Range: Southern California endemic occuring in San Diego and Riverside Counties (CNDDB 2014).
Regularity: Regularly occurring
Riverside and San Diego counties, California; stems with wide-spreading branches; leaflets pinnatifid into 3-5 oblanceolate segments; nutlets 4 mm long. (Munz, 1959).
Comments: Moist lake shores and wet places, yellow pine forest, 4,500-5,000 ft.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 6 - 20
Comments: Thirty-two occurences but one is extirpated and about 20 haven't been surveyed for over 20 years (CNDDB 2014).
Life History and Behavior
Flowers have same characters as the family (bisexual), but 4 or 5-merous (Bailey and Bailey, 1974).
NatureServe Conservation Status
Rounded Global Status Rank: T2 - Imperiled
Reasons: California endemic with up to 30 extant element occurences. The subspecies is disjunct from var. gracilis, another narrow endemic. Threats include grazing and recreational development.
National NatureServe Conservation Status
Rounded National Status Rank: N2 - Imperiled
Degree of Threat: High - medium
Comments: Threats included alteration of hydrology, grazing, and recreational activities and development (CNDDB 2014; CNPS 2014).
Names and Taxonomy
Comments: Kartesz (1994) treats Limnanthes alba and L. gracilis as distinct taxa. In adddition, Kartesz (1994) recognizes L. gracilis ssp. parishii. FNA vol. 7 (2010) lumps L. alba and L. gracilis, retaining the infraspecific taxon, ssp. parishii, under L. alba.
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