tenuissima - the Mexican feathergrass - is a species of grass in the family Poaceae, native to the south-western United States, northern Mexico and Argentina. It is a deciduous grass growing to 60cm, forming a compact upright tuft of thread-like leaves, with narrow, arching, feathery flowering panicles in summer and autumn. It is sometimes used as an ornamental garden plant but readily escapes, and has become naturalized in the San Francisco area. It is well-matched to climate in Australia and can be harmful to the Australian environment.
