Trichostema simulatum is a species of flowering plant in the mint family known by the common name Siskiyou bluecurls.

It is found n the western United States, where it is native to the southern Cascade Range in northern California and southern Oregon, and in the northern Sierra Nevada of California.

It grows in open and generally sandy or gravelly sites of Yellow pine forests and adjacent habitats, at 500–1,600 metres (1,600–5,200 ft) in elevation.

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