Regularity: Regularly occurring
Global Range: USA, s CA, San Diego Co., Cuyamaca L.; the related var. gracilis is from sw OR, in similar edaphic situations.
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, 4500-5000'.
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 6 - 20
Comments: CNPS data. USFWS says fewer than 20 populations known (1994); state rank by Calif. Heritage is 'S2'.
Life History and Behavior
Flowers have same characters as the family (bisexual), but 4 or 5-merous (Bailey and Bailey, 1974).
National NatureServe Conservation Status
Rounded National Status Rank: N2 - Imperiled
NatureServe Conservation Status
Rounded Global Status Rank: T2 - Imperiled
Reasons: Moderate number of popns, widely disjunct distribution from var. gracilis, another narrow endemic, some threats.
Comments: CNPS considers endangered in part of range; threatened by grazing and recreational development.
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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