Malacothamnus astrotentaculatus is a species of flowering plant in the mallow family known by the common name starry-tentacled bushmallow. It is named after the somewhat tentacle-like outgrowths on the calyx that are covered in stellate trichomes. It is endemic to Shasta and Tehama counties in California.[1] [2]
Malacothamnus astrotentaculatus is distinguished from the rest of the genus by the combination of linear calyx bracts, calyx lobes generally much wider above the base than at the base, and a spike-like inflorescence.