Czaplicki: Contact Dermatitis From Eriodictyon parryi: Armed with sticky, glandular hairs coated with
irritating prenylated phenolics, contact with the poodle-
dog bush causes a blistering rash in a manner similar to
plants of the Toxicodendron genus.
[Wikipedia] Description, Taxonomy, Native American Use: Eriodictyon parryi or poodle-dog bush is a tall California mountain shrub with showy purple flowers, which is notable for secreting a severe skin irritant. It is an opportunistic species that grows mostly in areas that have been disturbed by fire. In a dry early spring in Southern California, its semi-dormant leaves can droop and curl into coils like locks of curly hair, hence the popular name based on the metaphor of a poodle's natural hair.
Taxonomy
When first described by Asa Gray, the poodle-dog bush was placed within the genus Nama. It was subsequently moved to a monotypic genus Turricula (having the same name as a genus of sea snails). Molecular phylogenetic analysis carried out by Ferguson (1998) supports treating Turricula as a separate genus within a clade (Ferguson does not use the term "subfamily") that includes Eriodictyon, and also the genera Nama and Wigandia. However, other molecular data support placing the plant in Eriodictyon.[7]
Native Americans used the plant medicinally: Zigmond (1981, p. 68) reports that the Kawaiisu people used an infusion of the leaves to relieve swellings or rheumatism, and Sparkman (1908, p. 230) also reports that the Luiseño people (who knew it as Atovikut) used it medicinally, though he does not specify for what purpose. No clinical trials have been undertaken to support the efficacy of the plant for these clinical conditions, and there is no reliable evidence that it can be used for any type of treatment. (link added by Mary Ann Machi)